Skip to main content

Main menu

  • Home
  • Content
    • Current Issue
    • Archive
    • Preview Papers
  • About
    • Editorial Board and Staff
    • About the Journal
    • Terms & Privacy
  • More
    • Alerts
    • Contact Us
  • Submit a Manuscript
    • Instructions for Authors
    • Submit a Manuscript
  • Other Publications
    • Plant Physiology
    • The Plant Cell
    • Plant Direct
    • The Arabidopsis Book
    • Teaching Tools in Plant Biology
    • ASPB
    • Plantae

User menu

  • My alerts
  • Log in

Search

  • Advanced search
Plant Cell
  • Other Publications
    • Plant Physiology
    • The Plant Cell
    • Plant Direct
    • The Arabidopsis Book
    • Teaching Tools in Plant Biology
    • ASPB
    • Plantae
  • My alerts
  • Log in
Plant Cell

Advanced Search

  • Home
  • Content
    • Current Issue
    • Archive
    • Preview Papers
  • About
    • Editorial Board and Staff
    • About the Journal
    • Terms & Privacy
  • More
    • Alerts
    • Contact Us
  • Submit a Manuscript
    • Instructions for Authors
    • Submit a Manuscript
  • Follow PlantCell on Twitter
  • Visit PlantCell on Facebook
  • Visit Plantae

Table of Contents

The Plant Cell Online: 19 (3)
Mar 2007
  • A
  • B
  • C
  • D
  • E
  • F
  • G
  • H
  • I
  • J
  • K
  • L
  • M
  • N
  • O
  • P
  • Q
  • R
  • S
  • T
  • U
  • V
  • W
  • X
  • Y
  • Z

A

  1. Adam, Zach

    1. You have accessRestricted Access
      The Thylakoid Lumen Protease Deg1 Is Involved in the Repair of Photosystem II from Photoinhibition in Arabidopsis
      Einat Kapri-Pardes, Leah Naveh, Zach Adam
      Plant Cell Mar 2007, 19 (3) 1039-1047; DOI: https://doi.org/10.1105/tpc.106.046573

      Photosynthesis is accompanied by accumulation of highly oxidizing species and oxygen radicals that cause photodamage within the photosystem II complex. Removal of damaged copies of the D1 protein is a prerequisite for reassembly of this complex. RNAi mutant and other analyses suggest that the lumenal protease Deg1 is involved in degradation of the D1 protein during PSII repair from photoinhibition.

  2. Ali, Rashid

    1. You have accessRestricted Access
      Death Don't Have No Mercy and Neither Does Calcium: Arabidopsis CYCLIC NUCLEOTIDE GATED CHANNEL2 and Innate Immunity
      Rashid Ali, Wei Ma, Fouad Lemtiri-Chlieh, Dimitrios Tsaltas, Qiang Leng, Susannne von Bodman, Gerald A. Berkowitz
      Plant Cell Mar 2007, 19 (3) 1081-1095; DOI: https://doi.org/10.1105/tpc.106.045096

      Plants lacking a Ca2+-conducting channel do not undergo hypersensitive response to pathogens and have impaired nitric oxide generation in response to application of a pathogen-associated molecular pattern elicitor. Patch clamp analysis demonstrated elicitor activation of inward cation currents; this work provides insights regarding early steps in pathogen response signaling in plants.

  3. Anderson, Lisa K.

    1. You have accessRestricted Access
      Impairment of Cellulose Synthases Required for Arabidopsis Secondary Cell Wall Formation Enhances Disease Resistance
      Camilo Hernández-Blanco, Dong Xin Feng, Jian Hu, Andrea Sánchez-Vallet, Laurent Deslandes, Francisco Llorente, Marta Berrocal-Lobo, Harald Keller, Xavier Barlet, Clara Sánchez-Rodríguez, Lisa K. Anderson, Shauna Somerville, Yves Marco, Antonio Molina
      Plant Cell Mar 2007, 19 (3) 890-903; DOI: https://doi.org/10.1105/tpc.106.048058

      Mutations in cellulose synthase subunits required for secondary cell wall formation confer resistance to bacterial and fungal pathogens and upregulate ABA-responsive defense genes. Alteration of secondary cell wall integrity by inhibiting cellulose synthesis may lead to activation of novel defense pathways that create antimicrobial-enriched environments hostile to pathogens.

  4. Arazi, Tzahi

    1. You have accessRestricted Access
      Chlorophyllase Is a Rate-Limiting Enzyme in Chlorophyll Catabolism and Is Posttranslationally Regulated
      Smadar Harpaz-Saad, Tamar Azoulay, Tzahi Arazi, Eran Ben-Yaakov, Anahit Mett, Yoel M. Shiboleth, Stefan Hörtensteiner, David Gidoni, Amit Gal-On, Eliezer E. Goldschmidt, Yoram Eyal
      Plant Cell Mar 2007, 19 (3) 1007-1022; DOI: https://doi.org/10.1105/tpc.107.050633

      Chlorophyll is a central player in photosynthetic light harvesting, but details of chlorophyll catabolism and regulation are unresolved. Here, two different expression systems in two species were used to study the role and regulation of Chlase in chlorophyll catabolism. The results suggest that Chlase is a rate-limiting enzyme in chlorophyll catabolism controlled via posttranslational regulation.

  5. Ariizumi, Tohru

    1. You have accessRestricted Access
      Seed Germination of GA-Insensitive sleepy1 Mutants Does Not Require RGL2 Protein Disappearance in Arabidopsis
      Tohru Ariizumi, Camille M. Steber
      Plant Cell Mar 2007, 19 (3) 791-804; DOI: https://doi.org/10.1105/tpc.106.048009

      Proper regulation of seed dormancy and germination is critical to plant survival. It was thought that disappearance of the negative regulator RGA-LIKE2 (RGL2) protein is required for seed germination. This report finds instead that RGL2 accumulates in germinating sleepy1 (sly1) mutants, suggesting that protein disappearance is not the only mechanism that relieves RGL2 repression of seed germination.

  6. Arnold, Maeva

    1. You have accessRestricted Access
      Single Gene–Mediated Shift in Pollinator Attraction in Petunia
      Maria Elena Hoballah, Thomas Gübitz, Jeroen Stuurman, Larissa Broger, Mario Barone, Therese Mandel, Alexandre Dell'Olivo, Maeva Arnold, Cris Kuhlemeier
      Plant Cell Mar 2007, 19 (3) 779-790; DOI: https://doi.org/10.1105/tpc.106.048694

      Many floral traits appear to be adapted to particular pollinators. AN2 is a well-defined myb-type transcription factor that is a major determinant of flower color variation between two Petunia species. Transformation of one species with AN2 from the other caused a switch in pollinator preference, suggesting that adaptation to a new pollinator may involve a limited number of genes of large effect.

  7. Azoulay, Tamar

    1. You have accessRestricted Access
      Chlorophyllase Is a Rate-Limiting Enzyme in Chlorophyll Catabolism and Is Posttranslationally Regulated
      Smadar Harpaz-Saad, Tamar Azoulay, Tzahi Arazi, Eran Ben-Yaakov, Anahit Mett, Yoel M. Shiboleth, Stefan Hörtensteiner, David Gidoni, Amit Gal-On, Eliezer E. Goldschmidt, Yoram Eyal
      Plant Cell Mar 2007, 19 (3) 1007-1022; DOI: https://doi.org/10.1105/tpc.107.050633

      Chlorophyll is a central player in photosynthetic light harvesting, but details of chlorophyll catabolism and regulation are unresolved. Here, two different expression systems in two species were used to study the role and regulation of Chlase in chlorophyll catabolism. The results suggest that Chlase is a rate-limiting enzyme in chlorophyll catabolism controlled via posttranslational regulation.

B

  1. Baldwin, Ian T.

    1. You have accessRestricted Access
      Herbivory Rapidly Activates MAPK Signaling in Attacked and Unattacked Leaf Regions but Not between Leaves of Nicotiana attenuata
      Jianqiang Wu, Christian Hettenhausen, Stefan Meldau, Ian T. Baldwin
      Plant Cell Mar 2007, 19 (3) 1096-1122; DOI: https://doi.org/10.1105/tpc.106.049353

      Mitogen-activated protein kinase (MAPK) signaling mediates plant responses to herbivore attack, but the transduction of these signals is poorly understood. This work examines how plants deploy defense reactions and demonstrates that herbivore oral secretions (OS) dramatically amplify wound-induced MAPK activity and that fatty acid–amino acid conjugates in herbivore OS are the elicitors.

  2. Barlet, Xavier

    1. You have accessRestricted Access
      Impairment of Cellulose Synthases Required for Arabidopsis Secondary Cell Wall Formation Enhances Disease Resistance
      Camilo Hernández-Blanco, Dong Xin Feng, Jian Hu, Andrea Sánchez-Vallet, Laurent Deslandes, Francisco Llorente, Marta Berrocal-Lobo, Harald Keller, Xavier Barlet, Clara Sánchez-Rodríguez, Lisa K. Anderson, Shauna Somerville, Yves Marco, Antonio Molina
      Plant Cell Mar 2007, 19 (3) 890-903; DOI: https://doi.org/10.1105/tpc.106.048058

      Mutations in cellulose synthase subunits required for secondary cell wall formation confer resistance to bacterial and fungal pathogens and upregulate ABA-responsive defense genes. Alteration of secondary cell wall integrity by inhibiting cellulose synthesis may lead to activation of novel defense pathways that create antimicrobial-enriched environments hostile to pathogens.

  3. Barone, Mario

    1. You have accessRestricted Access
      Single Gene–Mediated Shift in Pollinator Attraction in Petunia
      Maria Elena Hoballah, Thomas Gübitz, Jeroen Stuurman, Larissa Broger, Mario Barone, Therese Mandel, Alexandre Dell'Olivo, Maeva Arnold, Cris Kuhlemeier
      Plant Cell Mar 2007, 19 (3) 779-790; DOI: https://doi.org/10.1105/tpc.106.048694

      Many floral traits appear to be adapted to particular pollinators. AN2 is a well-defined myb-type transcription factor that is a major determinant of flower color variation between two Petunia species. Transformation of one species with AN2 from the other caused a switch in pollinator preference, suggesting that adaptation to a new pollinator may involve a limited number of genes of large effect.

  4. Bassi, Roberto

    1. You have accessRestricted Access
      The Arabidopsis aba4-1 Mutant Reveals a Specific Function for Neoxanthin in Protection against Photooxidative Stress
      Luca Dall'Osto, Stefano Cazzaniga, Helen North, Annie Marion-Poll, Roberto Bassi
      Plant Cell Mar 2007, 19 (3) 1048-1064; DOI: https://doi.org/10.1105/tpc.106.049114

      Carotenoids help protect the chloroplast from photoxidative stress. The aba4-1 mutant lacks neoxanthin but retains all other xanthophyll species. This research shows that neoxanthin plays a specific role in protection of Lhc proteins, the PSII reaction center, and thylakoids from photooxidative stress and protects against the damaging effects of reactive oxygen species, particularly superoxide anions.

  5. Ben-Yaakov, Eran

    1. You have accessRestricted Access
      Chlorophyllase Is a Rate-Limiting Enzyme in Chlorophyll Catabolism and Is Posttranslationally Regulated
      Smadar Harpaz-Saad, Tamar Azoulay, Tzahi Arazi, Eran Ben-Yaakov, Anahit Mett, Yoel M. Shiboleth, Stefan Hörtensteiner, David Gidoni, Amit Gal-On, Eliezer E. Goldschmidt, Yoram Eyal
      Plant Cell Mar 2007, 19 (3) 1007-1022; DOI: https://doi.org/10.1105/tpc.107.050633

      Chlorophyll is a central player in photosynthetic light harvesting, but details of chlorophyll catabolism and regulation are unresolved. Here, two different expression systems in two species were used to study the role and regulation of Chlase in chlorophyll catabolism. The results suggest that Chlase is a rate-limiting enzyme in chlorophyll catabolism controlled via posttranslational regulation.

  6. Berkowitz, Gerald A.

    1. You have accessRestricted Access
      Death Don't Have No Mercy and Neither Does Calcium: Arabidopsis CYCLIC NUCLEOTIDE GATED CHANNEL2 and Innate Immunity
      Rashid Ali, Wei Ma, Fouad Lemtiri-Chlieh, Dimitrios Tsaltas, Qiang Leng, Susannne von Bodman, Gerald A. Berkowitz
      Plant Cell Mar 2007, 19 (3) 1081-1095; DOI: https://doi.org/10.1105/tpc.106.045096

      Plants lacking a Ca2+-conducting channel do not undergo hypersensitive response to pathogens and have impaired nitric oxide generation in response to application of a pathogen-associated molecular pattern elicitor. Patch clamp analysis demonstrated elicitor activation of inward cation currents; this work provides insights regarding early steps in pathogen response signaling in plants.

  7. Berrocal-Lobo, Marta

    1. You have accessRestricted Access
      Impairment of Cellulose Synthases Required for Arabidopsis Secondary Cell Wall Formation Enhances Disease Resistance
      Camilo Hernández-Blanco, Dong Xin Feng, Jian Hu, Andrea Sánchez-Vallet, Laurent Deslandes, Francisco Llorente, Marta Berrocal-Lobo, Harald Keller, Xavier Barlet, Clara Sánchez-Rodríguez, Lisa K. Anderson, Shauna Somerville, Yves Marco, Antonio Molina
      Plant Cell Mar 2007, 19 (3) 890-903; DOI: https://doi.org/10.1105/tpc.106.048058

      Mutations in cellulose synthase subunits required for secondary cell wall formation confer resistance to bacterial and fungal pathogens and upregulate ABA-responsive defense genes. Alteration of secondary cell wall integrity by inhibiting cellulose synthesis may lead to activation of novel defense pathways that create antimicrobial-enriched environments hostile to pathogens.

  8. Bohne, Alexandra-Viola

    1. You have accessRestricted Access
      Arabidopsis Phage-Type RNA Polymerases: Accurate in Vitro Transcription of Organellar Genes
      Kristina Kühn, Alexandra-Viola Bohne, Karsten Liere, Andreas Weihe, Thomas Börner
      Plant Cell Mar 2007, 19 (3) 959-971; DOI: https://doi.org/10.1105/tpc.106.046839

      Three Arabidopsis nuclear-encoded T7 phage-type RNA polymerases (RNAPs) localize to mitochondria, plastids, or both. This study finds that two of them can initiate transcription from both mitochondrial and plastid promoters in vitro without auxiliary factors. The ability for promoter recognition appears to have been conserved over a long period of evolution of organellar RNAPs.

  9. Börner, Thomas

    1. You have accessRestricted Access
      Arabidopsis Phage-Type RNA Polymerases: Accurate in Vitro Transcription of Organellar Genes
      Kristina Kühn, Alexandra-Viola Bohne, Karsten Liere, Andreas Weihe, Thomas Börner
      Plant Cell Mar 2007, 19 (3) 959-971; DOI: https://doi.org/10.1105/tpc.106.046839

      Three Arabidopsis nuclear-encoded T7 phage-type RNA polymerases (RNAPs) localize to mitochondria, plastids, or both. This study finds that two of them can initiate transcription from both mitochondrial and plastid promoters in vitro without auxiliary factors. The ability for promoter recognition appears to have been conserved over a long period of evolution of organellar RNAPs.

  10. Bradley, Desmond

    1. You have accessRestricted Access
      TERMINAL FLOWER1 Is a Mobile Signal Controlling Arabidopsis Architecture
      Lucio Conti, Desmond Bradley
      Plant Cell Mar 2007, 19 (3) 767-778; DOI: https://doi.org/10.1105/tpc.106.049767

      TERMINAL FLOWER1 (TFL1) affects the number and identity of aerial organs. TFL1 mRNA is restricted to the inner cells of the meristem, but this work reveals that the protein is a mobile signal that becomes evenly distributed across the meristem and suggests a model for how floral and shoot meristems establish a feedback loop of expression and protein movement to control inflorescence architecture.

  11. Broger, Larissa

    1. You have accessRestricted Access
      Single Gene–Mediated Shift in Pollinator Attraction in Petunia
      Maria Elena Hoballah, Thomas Gübitz, Jeroen Stuurman, Larissa Broger, Mario Barone, Therese Mandel, Alexandre Dell'Olivo, Maeva Arnold, Cris Kuhlemeier
      Plant Cell Mar 2007, 19 (3) 779-790; DOI: https://doi.org/10.1105/tpc.106.048694

      Many floral traits appear to be adapted to particular pollinators. AN2 is a well-defined myb-type transcription factor that is a major determinant of flower color variation between two Petunia species. Transformation of one species with AN2 from the other caused a switch in pollinator preference, suggesting that adaptation to a new pollinator may involve a limited number of genes of large effect.

C

  1. Cao, Wenguang

    1. You have accessRestricted Access
      The N-Terminal Double-Stranded RNA Binding Domains of Arabidopsis HYPONASTIC LEAVES1 Are Sufficient for Pre-MicroRNA Processing
      Feijie Wu, Lin Yu, Wenguang Cao, Yanfei Mao, Zhongyuan Liu, Yuke He
      Plant Cell Mar 2007, 19 (3) 914-925; DOI: https://doi.org/10.1105/tpc.106.048637

      Some double-stranded RNA binding proteins participate in miRNA biogenesis. A series of deletion mutants demonstrated that the N-terminal region of HYPONASTIC LEAVES1 with two double-stranded RNA binding domains is sufficient for miRNA biogenesis and capable of rescuing the hyl1 phenotype. This study also showed that the putative NLS is a true nuclear localization signal.

  2. Carrington, James C.

    1. Open Access
      Genome-Wide Analysis of the RNA-DEPENDENT RNA POLYMERASE6/DICER-LIKE4 Pathway in Arabidopsis Reveals Dependency on miRNA- and tasiRNA-Directed Targeting
      Miya D. Howell, Noah Fahlgren, Elisabeth J. Chapman, Jason S. Cumbie, Christopher M. Sullivan, Scott A. Givan, Kristin D. Kasschau, James C. Carrington
      Plant Cell Mar 2007, 19 (3) 926-942; DOI: https://doi.org/10.1105/tpc.107.050062

      Using high-throughput sequencing methods, many transcripts were found to be routed through the RDR6/DCL4-dependent silencing pathway after single or dual targeting events by miRNA or tasiRNA. Several members of a rapidly expanding clade of PPR gene transcripts were targeted, suggesting that this silencing pathway may function to buffer the effects of rapidly expanding gene families.

  3. Cascón, Tomas

    1. You have accessRestricted Access
      Oxylipins Produced by the 9-Lipoxygenase Pathway in Arabidopsis Regulate Lateral Root Development and Defense Responses through a Specific Signaling Cascade
      Tamara Vellosillo, Marta Martínez, Miguel Angel López, Jorge Vicente, Tomas Cascón, Liam Dolan, Mats Hamberg, Carmen Castresana
      Plant Cell Mar 2007, 19 (3) 831-846; DOI: https://doi.org/10.1105/tpc.106.046052

      The importance of oxylipins, such as jasmonic acid, in plant defense and adaptation is well known. This work suggests that other oxylipins, such as 9-hydroxyoctadecatrienoic acid, also function in developmental and defense responses, such as callose and pectin deposition and production of reactive oxygen species. Mutant analyses revealed at least three signaling cascades mediating oxylipin action.

  4. Castresana, Carmen

    1. You have accessRestricted Access
      Oxylipins Produced by the 9-Lipoxygenase Pathway in Arabidopsis Regulate Lateral Root Development and Defense Responses through a Specific Signaling Cascade
      Tamara Vellosillo, Marta Martínez, Miguel Angel López, Jorge Vicente, Tomas Cascón, Liam Dolan, Mats Hamberg, Carmen Castresana
      Plant Cell Mar 2007, 19 (3) 831-846; DOI: https://doi.org/10.1105/tpc.106.046052

      The importance of oxylipins, such as jasmonic acid, in plant defense and adaptation is well known. This work suggests that other oxylipins, such as 9-hydroxyoctadecatrienoic acid, also function in developmental and defense responses, such as callose and pectin deposition and production of reactive oxygen species. Mutant analyses revealed at least three signaling cascades mediating oxylipin action.

  5. Catarecha, Pablo

    1. You have accessRestricted Access
      A Mutant of the Arabidopsis Phosphate Transporter PHT1;1 Displays Enhanced Arsenic Accumulation
      Pablo Catarecha, Ma Dolores Segura, José Manuel Franco-Zorrilla, Berenice García-Ponce, Mónica Lanza, Roberto Solano, Javier Paz-Ares, Antonio Leyva
      Plant Cell Mar 2007, 19 (3) 1123-1133; DOI: https://doi.org/10.1105/tpc.106.041871

      Arsenate [As(V)], the most abundant chemical form of the toxic element arsenic, is very similar to phosphate (Pi), which enables its uptake from the soil through the high-affinity Pi transport system. This work identifies a Pi transporter mutant with enhanced ability to accumulate arsenic but with a reduced Pi and As(V) uptake rate, suggesting a protective mechanism operating in arsenic-tolerant plants.

  6. Cazzaniga, Stefano

    1. You have accessRestricted Access
      The Arabidopsis aba4-1 Mutant Reveals a Specific Function for Neoxanthin in Protection against Photooxidative Stress
      Luca Dall'Osto, Stefano Cazzaniga, Helen North, Annie Marion-Poll, Roberto Bassi
      Plant Cell Mar 2007, 19 (3) 1048-1064; DOI: https://doi.org/10.1105/tpc.106.049114

      Carotenoids help protect the chloroplast from photoxidative stress. The aba4-1 mutant lacks neoxanthin but retains all other xanthophyll species. This research shows that neoxanthin plays a specific role in protection of Lhc proteins, the PSII reaction center, and thylakoids from photooxidative stress and protects against the damaging effects of reactive oxygen species, particularly superoxide anions.

  7. Chapman, Elisabeth J.

    1. Open Access
      Genome-Wide Analysis of the RNA-DEPENDENT RNA POLYMERASE6/DICER-LIKE4 Pathway in Arabidopsis Reveals Dependency on miRNA- and tasiRNA-Directed Targeting
      Miya D. Howell, Noah Fahlgren, Elisabeth J. Chapman, Jason S. Cumbie, Christopher M. Sullivan, Scott A. Givan, Kristin D. Kasschau, James C. Carrington
      Plant Cell Mar 2007, 19 (3) 926-942; DOI: https://doi.org/10.1105/tpc.107.050062

      Using high-throughput sequencing methods, many transcripts were found to be routed through the RDR6/DCL4-dependent silencing pathway after single or dual targeting events by miRNA or tasiRNA. Several members of a rapidly expanding clade of PPR gene transcripts were targeted, suggesting that this silencing pathway may function to buffer the effects of rapidly expanding gene families.

  8. Chen, Rongzhi

    1. Open Access
      Rice UDP-Glucose Pyrophosphorylase1 Is Essential for Pollen Callose Deposition and Its Cosuppression Results in a New Type of Thermosensitive Genic Male Sterility
      Rongzhi Chen, Xiao Zhao, Zhe Shao, Zhe Wei, Yuanyuan Wang, Lili Zhu, Jie Zhao, Mengxiang Sun, Ruifeng He, Guangcun He
      Plant Cell Mar 2007, 19 (3) 847-861; DOI: https://doi.org/10.1105/tpc.106.044123

      UDP-glucose pyrophosphorylase functions in carbohydrate metabolism and cell wall biosynthesis. Silencing of rice Ugp1 affects normal callose deposition during pollen mother cell (PMC) meiosis and leads to the degeneration of PMC at the early meiosis stage. This work demonstrates that rice Ugp1 is essential for PMC meiosis and microspore development.

  9. Chen, Zhixiang

    1. You have accessRestricted Access
      Improperly Terminated, Unpolyadenylated mRNA of Sense Transgenes Is Targeted by RDR6-Mediated RNA Silencing in Arabidopsis
      Zhenghua Luo, Zhixiang Chen
      Plant Cell Mar 2007, 19 (3) 943-958; DOI: https://doi.org/10.1105/tpc.106.045724

      RNA silencing induced by sense transgenes may protect against excessively expressed genes, but whether all transcripts or just aberrant ones activate genome surveillance is unclear. Constructs with enhanced or reduced production of aberrant RNAs were tested and showed RNA-DEPENDENT RNA POLYMERASE6–mediated silencing induced by aberrant mRNAs, which probably act as templates for the RNA polymerase.

  10. Conti, Lucio

    1. You have accessRestricted Access
      TERMINAL FLOWER1 Is a Mobile Signal Controlling Arabidopsis Architecture
      Lucio Conti, Desmond Bradley
      Plant Cell Mar 2007, 19 (3) 767-778; DOI: https://doi.org/10.1105/tpc.106.049767

      TERMINAL FLOWER1 (TFL1) affects the number and identity of aerial organs. TFL1 mRNA is restricted to the inner cells of the meristem, but this work reveals that the protein is a mobile signal that becomes evenly distributed across the meristem and suggests a model for how floral and shoot meristems establish a feedback loop of expression and protein movement to control inflorescence architecture.

  11. Cumbie, Jason S.

    1. Open Access
      Genome-Wide Analysis of the RNA-DEPENDENT RNA POLYMERASE6/DICER-LIKE4 Pathway in Arabidopsis Reveals Dependency on miRNA- and tasiRNA-Directed Targeting
      Miya D. Howell, Noah Fahlgren, Elisabeth J. Chapman, Jason S. Cumbie, Christopher M. Sullivan, Scott A. Givan, Kristin D. Kasschau, James C. Carrington
      Plant Cell Mar 2007, 19 (3) 926-942; DOI: https://doi.org/10.1105/tpc.107.050062

      Using high-throughput sequencing methods, many transcripts were found to be routed through the RDR6/DCL4-dependent silencing pathway after single or dual targeting events by miRNA or tasiRNA. Several members of a rapidly expanding clade of PPR gene transcripts were targeted, suggesting that this silencing pathway may function to buffer the effects of rapidly expanding gene families.

D

  1. Dall'Osto, Luca

    1. You have accessRestricted Access
      The Arabidopsis aba4-1 Mutant Reveals a Specific Function for Neoxanthin in Protection against Photooxidative Stress
      Luca Dall'Osto, Stefano Cazzaniga, Helen North, Annie Marion-Poll, Roberto Bassi
      Plant Cell Mar 2007, 19 (3) 1048-1064; DOI: https://doi.org/10.1105/tpc.106.049114

      Carotenoids help protect the chloroplast from photoxidative stress. The aba4-1 mutant lacks neoxanthin but retains all other xanthophyll species. This research shows that neoxanthin plays a specific role in protection of Lhc proteins, the PSII reaction center, and thylakoids from photooxidative stress and protects against the damaging effects of reactive oxygen species, particularly superoxide anions.

  2. Dell'Olivo, Alexandre

    1. You have accessRestricted Access
      Single Gene–Mediated Shift in Pollinator Attraction in Petunia
      Maria Elena Hoballah, Thomas Gübitz, Jeroen Stuurman, Larissa Broger, Mario Barone, Therese Mandel, Alexandre Dell'Olivo, Maeva Arnold, Cris Kuhlemeier
      Plant Cell Mar 2007, 19 (3) 779-790; DOI: https://doi.org/10.1105/tpc.106.048694

      Many floral traits appear to be adapted to particular pollinators. AN2 is a well-defined myb-type transcription factor that is a major determinant of flower color variation between two Petunia species. Transformation of one species with AN2 from the other caused a switch in pollinator preference, suggesting that adaptation to a new pollinator may involve a limited number of genes of large effect.

  3. Deng, Xing Wang

    1. You have accessRestricted Access
      Analysis of Transcription Factor HY5 Genomic Binding Sites Revealed Its Hierarchical Role in Light Regulation of Development
      Jungeun Lee, Kun He, Viktor Stolc, Horim Lee, Pablo Figueroa, Ying Gao, Waraporn Tongprasit, Hongyu Zhao, Ilha Lee, Xing Wang Deng
      Plant Cell Mar 2007, 19 (3) 731-749; DOI: https://doi.org/10.1105/tpc.106.047688

      Light signals induce complex developmental programs in plants. The transcription factor HY5 acts downstream of multiple photoreceptors, but its target genes are not well known. Putative HY5 binding sites were mapped to 3894 genes with diverse developmental functions, including early light-responsive genes. HY5 appears to be an early regulator of the transcriptional cascades for photomorphogenesis.

  4. Deslandes, Laurent

    1. You have accessRestricted Access
      Impairment of Cellulose Synthases Required for Arabidopsis Secondary Cell Wall Formation Enhances Disease Resistance
      Camilo Hernández-Blanco, Dong Xin Feng, Jian Hu, Andrea Sánchez-Vallet, Laurent Deslandes, Francisco Llorente, Marta Berrocal-Lobo, Harald Keller, Xavier Barlet, Clara Sánchez-Rodríguez, Lisa K. Anderson, Shauna Somerville, Yves Marco, Antonio Molina
      Plant Cell Mar 2007, 19 (3) 890-903; DOI: https://doi.org/10.1105/tpc.106.048058

      Mutations in cellulose synthase subunits required for secondary cell wall formation confer resistance to bacterial and fungal pathogens and upregulate ABA-responsive defense genes. Alteration of secondary cell wall integrity by inhibiting cellulose synthesis may lead to activation of novel defense pathways that create antimicrobial-enriched environments hostile to pathogens.

  5. Dissmeyer, Nico

    1. Open Access
      T-Loop Phosphorylation of Arabidopsis CDKA;1 Is Required for Its Function and Can Be Partially Substituted by an Aspartate Residue
      Nico Dissmeyer, Moritz K. Nowack, Stefan Pusch, Hilde Stals, Dirk Inzé, Paul E. Grini, Arp Schnittger
      Plant Cell Mar 2007, 19 (3) 972-985; DOI: https://doi.org/10.1105/tpc.107.050401

      To divide or not is one of the most crucial choices made by cells. As in other eukaryotes, progression through the cell cycle in plants is governed by cyclin-dependent kinases (CDKs), and one of the major regulatory inputs to CDK function is phosphorylation. Here, it is shown that Arabidopsis CDKA;1 is phosphorylated in the T-loop region and that phosphorylation is essential for kinase function.

  6. Doke, Noriyuki

    1. Open Access
      Calcium-Dependent Protein Kinases Regulate the Production of Reactive Oxygen Species by Potato NADPH Oxidase
      Michie Kobayashi, Ikuko Ohura, Kazuhito Kawakita, Naohiko Yokota, Masayuki Fujiwara, Ko Shimamoto, Noriyuki Doke, Hirofumi Yoshioka
      Plant Cell Mar 2007, 19 (3) 1065-1080; DOI: https://doi.org/10.1105/tpc.106.048884

      The NADPH oxidase RBOH and calcium-dependent protein kinases (CDPKs) are implicated in rapid production of reactive oxygen species, or oxidative burst, early in plant–pathogen interactions, but the regulatory mechanisms are unknown. The results of this work suggest that Ca2+-dependent phosphorylation of potato RBOHB by CDPK5 plays a central role in oxidative burst during pathogen infection.

  7. Dolan, Liam

    1. You have accessRestricted Access
      Oxylipins Produced by the 9-Lipoxygenase Pathway in Arabidopsis Regulate Lateral Root Development and Defense Responses through a Specific Signaling Cascade
      Tamara Vellosillo, Marta Martínez, Miguel Angel López, Jorge Vicente, Tomas Cascón, Liam Dolan, Mats Hamberg, Carmen Castresana
      Plant Cell Mar 2007, 19 (3) 831-846; DOI: https://doi.org/10.1105/tpc.106.046052

      The importance of oxylipins, such as jasmonic acid, in plant defense and adaptation is well known. This work suggests that other oxylipins, such as 9-hydroxyoctadecatrienoic acid, also function in developmental and defense responses, such as callose and pectin deposition and production of reactive oxygen species. Mutant analyses revealed at least three signaling cascades mediating oxylipin action.

  8. Duy, Daniela

    1. You have accessRestricted Access
      PIC1, an Ancient Permease in Arabidopsis Chloroplasts, Mediates Iron Transport
      Daniela Duy, Gerhard Wanner, Anderson R. Meda, Nicolaus von Wirén, Jürgen Soll, Katrin Philippar
      Plant Cell Mar 2007, 19 (3) 986-1006; DOI: https://doi.org/10.1105/tpc.106.047407

      Chloroplasts are a major sink for metal ions like iron and copper, which play essential roles in photosynthetic electron transport. However, very little is known about iron uptake by the chloroplast. This study characterized PIC1 from Arabidopsis, which is a transmembrane protein of cyanobacterial origin that most likely functions as a metal ion permease in the chloroplast envelope.

E

  1. Eckardt, Nancy A.

    1. You have accessRestricted Access
      Light Regulation of Plant Development: HY5 Genomic Binding Sites
      Nancy A. Eckardt
      Plant Cell Mar 2007, 19 (3) 727-729; DOI: https://doi.org/10.1105/tpc.107.052233
    2. You have accessRestricted Access
      Focus on Meiotic Crossover Interference
      Nancy A. Eckardt
      Plant Cell Mar 2007, 19 (3) 730a; DOI: https://doi.org/10.1105/tpc.107.190311
    3. You have accessRestricted Access
      Novel Oxylipin Signaling Cascades
      Nancy A. Eckardt
      Plant Cell Mar 2007, 19 (3) 730; DOI: https://doi.org/10.1105/tpc.107.190310
  2. Eyal, Yoram

    1. You have accessRestricted Access
      Chlorophyllase Is a Rate-Limiting Enzyme in Chlorophyll Catabolism and Is Posttranslationally Regulated
      Smadar Harpaz-Saad, Tamar Azoulay, Tzahi Arazi, Eran Ben-Yaakov, Anahit Mett, Yoel M. Shiboleth, Stefan Hörtensteiner, David Gidoni, Amit Gal-On, Eliezer E. Goldschmidt, Yoram Eyal
      Plant Cell Mar 2007, 19 (3) 1007-1022; DOI: https://doi.org/10.1105/tpc.107.050633

      Chlorophyll is a central player in photosynthetic light harvesting, but details of chlorophyll catabolism and regulation are unresolved. Here, two different expression systems in two species were used to study the role and regulation of Chlase in chlorophyll catabolism. The results suggest that Chlase is a rate-limiting enzyme in chlorophyll catabolism controlled via posttranslational regulation.

F

  1. Fahlgren, Noah

    1. Open Access
      Genome-Wide Analysis of the RNA-DEPENDENT RNA POLYMERASE6/DICER-LIKE4 Pathway in Arabidopsis Reveals Dependency on miRNA- and tasiRNA-Directed Targeting
      Miya D. Howell, Noah Fahlgren, Elisabeth J. Chapman, Jason S. Cumbie, Christopher M. Sullivan, Scott A. Givan, Kristin D. Kasschau, James C. Carrington
      Plant Cell Mar 2007, 19 (3) 926-942; DOI: https://doi.org/10.1105/tpc.107.050062

      Using high-throughput sequencing methods, many transcripts were found to be routed through the RDR6/DCL4-dependent silencing pathway after single or dual targeting events by miRNA or tasiRNA. Several members of a rapidly expanding clade of PPR gene transcripts were targeted, suggesting that this silencing pathway may function to buffer the effects of rapidly expanding gene families.

  2. Feng, Dong Xin

    1. You have accessRestricted Access
      Impairment of Cellulose Synthases Required for Arabidopsis Secondary Cell Wall Formation Enhances Disease Resistance
      Camilo Hernández-Blanco, Dong Xin Feng, Jian Hu, Andrea Sánchez-Vallet, Laurent Deslandes, Francisco Llorente, Marta Berrocal-Lobo, Harald Keller, Xavier Barlet, Clara Sánchez-Rodríguez, Lisa K. Anderson, Shauna Somerville, Yves Marco, Antonio Molina
      Plant Cell Mar 2007, 19 (3) 890-903; DOI: https://doi.org/10.1105/tpc.106.048058

      Mutations in cellulose synthase subunits required for secondary cell wall formation confer resistance to bacterial and fungal pathogens and upregulate ABA-responsive defense genes. Alteration of secondary cell wall integrity by inhibiting cellulose synthesis may lead to activation of novel defense pathways that create antimicrobial-enriched environments hostile to pathogens.

  3. Figueroa, Pablo

    1. You have accessRestricted Access
      Analysis of Transcription Factor HY5 Genomic Binding Sites Revealed Its Hierarchical Role in Light Regulation of Development
      Jungeun Lee, Kun He, Viktor Stolc, Horim Lee, Pablo Figueroa, Ying Gao, Waraporn Tongprasit, Hongyu Zhao, Ilha Lee, Xing Wang Deng
      Plant Cell Mar 2007, 19 (3) 731-749; DOI: https://doi.org/10.1105/tpc.106.047688

      Light signals induce complex developmental programs in plants. The transcription factor HY5 acts downstream of multiple photoreceptors, but its target genes are not well known. Putative HY5 binding sites were mapped to 3894 genes with diverse developmental functions, including early light-responsive genes. HY5 appears to be an early regulator of the transcriptional cascades for photomorphogenesis.

  4. Franco-Zorrilla, José Manuel

    1. You have accessRestricted Access
      A Mutant of the Arabidopsis Phosphate Transporter PHT1;1 Displays Enhanced Arsenic Accumulation
      Pablo Catarecha, Ma Dolores Segura, José Manuel Franco-Zorrilla, Berenice García-Ponce, Mónica Lanza, Roberto Solano, Javier Paz-Ares, Antonio Leyva
      Plant Cell Mar 2007, 19 (3) 1123-1133; DOI: https://doi.org/10.1105/tpc.106.041871

      Arsenate [As(V)], the most abundant chemical form of the toxic element arsenic, is very similar to phosphate (Pi), which enables its uptake from the soil through the high-affinity Pi transport system. This work identifies a Pi transporter mutant with enhanced ability to accumulate arsenic but with a reduced Pi and As(V) uptake rate, suggesting a protective mechanism operating in arsenic-tolerant plants.

  5. Fujiwara, Masayuki

    1. Open Access
      Calcium-Dependent Protein Kinases Regulate the Production of Reactive Oxygen Species by Potato NADPH Oxidase
      Michie Kobayashi, Ikuko Ohura, Kazuhito Kawakita, Naohiko Yokota, Masayuki Fujiwara, Ko Shimamoto, Noriyuki Doke, Hirofumi Yoshioka
      Plant Cell Mar 2007, 19 (3) 1065-1080; DOI: https://doi.org/10.1105/tpc.106.048884

      The NADPH oxidase RBOH and calcium-dependent protein kinases (CDPKs) are implicated in rapid production of reactive oxygen species, or oxidative burst, early in plant–pathogen interactions, but the regulatory mechanisms are unknown. The results of this work suggest that Ca2+-dependent phosphorylation of potato RBOHB by CDPK5 plays a central role in oxidative burst during pathogen infection.

G

  1. Gal-On, Amit

    1. You have accessRestricted Access
      Chlorophyllase Is a Rate-Limiting Enzyme in Chlorophyll Catabolism and Is Posttranslationally Regulated
      Smadar Harpaz-Saad, Tamar Azoulay, Tzahi Arazi, Eran Ben-Yaakov, Anahit Mett, Yoel M. Shiboleth, Stefan Hörtensteiner, David Gidoni, Amit Gal-On, Eliezer E. Goldschmidt, Yoram Eyal
      Plant Cell Mar 2007, 19 (3) 1007-1022; DOI: https://doi.org/10.1105/tpc.107.050633

      Chlorophyll is a central player in photosynthetic light harvesting, but details of chlorophyll catabolism and regulation are unresolved. Here, two different expression systems in two species were used to study the role and regulation of Chlase in chlorophyll catabolism. The results suggest that Chlase is a rate-limiting enzyme in chlorophyll catabolism controlled via posttranslational regulation.

  2. Gao, Ying

    1. You have accessRestricted Access
      Analysis of Transcription Factor HY5 Genomic Binding Sites Revealed Its Hierarchical Role in Light Regulation of Development
      Jungeun Lee, Kun He, Viktor Stolc, Horim Lee, Pablo Figueroa, Ying Gao, Waraporn Tongprasit, Hongyu Zhao, Ilha Lee, Xing Wang Deng
      Plant Cell Mar 2007, 19 (3) 731-749; DOI: https://doi.org/10.1105/tpc.106.047688

      Light signals induce complex developmental programs in plants. The transcription factor HY5 acts downstream of multiple photoreceptors, but its target genes are not well known. Putative HY5 binding sites were mapped to 3894 genes with diverse developmental functions, including early light-responsive genes. HY5 appears to be an early regulator of the transcriptional cascades for photomorphogenesis.

  3. García-Ponce, Berenice

    1. You have accessRestricted Access
      A Mutant of the Arabidopsis Phosphate Transporter PHT1;1 Displays Enhanced Arsenic Accumulation
      Pablo Catarecha, Ma Dolores Segura, José Manuel Franco-Zorrilla, Berenice García-Ponce, Mónica Lanza, Roberto Solano, Javier Paz-Ares, Antonio Leyva
      Plant Cell Mar 2007, 19 (3) 1123-1133; DOI: https://doi.org/10.1105/tpc.106.041871

      Arsenate [As(V)], the most abundant chemical form of the toxic element arsenic, is very similar to phosphate (Pi), which enables its uptake from the soil through the high-affinity Pi transport system. This work identifies a Pi transporter mutant with enhanced ability to accumulate arsenic but with a reduced Pi and As(V) uptake rate, suggesting a protective mechanism operating in arsenic-tolerant plants.

  4. Gidoni, David

    1. You have accessRestricted Access
      Chlorophyllase Is a Rate-Limiting Enzyme in Chlorophyll Catabolism and Is Posttranslationally Regulated
      Smadar Harpaz-Saad, Tamar Azoulay, Tzahi Arazi, Eran Ben-Yaakov, Anahit Mett, Yoel M. Shiboleth, Stefan Hörtensteiner, David Gidoni, Amit Gal-On, Eliezer E. Goldschmidt, Yoram Eyal
      Plant Cell Mar 2007, 19 (3) 1007-1022; DOI: https://doi.org/10.1105/tpc.107.050633

      Chlorophyll is a central player in photosynthetic light harvesting, but details of chlorophyll catabolism and regulation are unresolved. Here, two different expression systems in two species were used to study the role and regulation of Chlase in chlorophyll catabolism. The results suggest that Chlase is a rate-limiting enzyme in chlorophyll catabolism controlled via posttranslational regulation.

  5. Givan, Scott A.

    1. Open Access
      Genome-Wide Analysis of the RNA-DEPENDENT RNA POLYMERASE6/DICER-LIKE4 Pathway in Arabidopsis Reveals Dependency on miRNA- and tasiRNA-Directed Targeting
      Miya D. Howell, Noah Fahlgren, Elisabeth J. Chapman, Jason S. Cumbie, Christopher M. Sullivan, Scott A. Givan, Kristin D. Kasschau, James C. Carrington
      Plant Cell Mar 2007, 19 (3) 926-942; DOI: https://doi.org/10.1105/tpc.107.050062

      Using high-throughput sequencing methods, many transcripts were found to be routed through the RDR6/DCL4-dependent silencing pathway after single or dual targeting events by miRNA or tasiRNA. Several members of a rapidly expanding clade of PPR gene transcripts were targeted, suggesting that this silencing pathway may function to buffer the effects of rapidly expanding gene families.

  6. Goldschmidt, Eliezer E.

    1. You have accessRestricted Access
      Chlorophyllase Is a Rate-Limiting Enzyme in Chlorophyll Catabolism and Is Posttranslationally Regulated
      Smadar Harpaz-Saad, Tamar Azoulay, Tzahi Arazi, Eran Ben-Yaakov, Anahit Mett, Yoel M. Shiboleth, Stefan Hörtensteiner, David Gidoni, Amit Gal-On, Eliezer E. Goldschmidt, Yoram Eyal
      Plant Cell Mar 2007, 19 (3) 1007-1022; DOI: https://doi.org/10.1105/tpc.107.050633

      Chlorophyll is a central player in photosynthetic light harvesting, but details of chlorophyll catabolism and regulation are unresolved. Here, two different expression systems in two species were used to study the role and regulation of Chlase in chlorophyll catabolism. The results suggest that Chlase is a rate-limiting enzyme in chlorophyll catabolism controlled via posttranslational regulation.

  7. Gould, Billie

    1. You have accessRestricted Access
      Elaboration of B Gene Function to Include the Identity of Novel Floral Organs in the Lower Eudicot Aquilegia
      Elena M. Kramer, Lynn Holappa, Billie Gould, M. Alejandra Jaramillo, Dimitriy Setnikov, Philip M. Santiago
      Plant Cell Mar 2007, 19 (3) 750-766; DOI: https://doi.org/10.1105/tpc.107.050385

      The classical ABC model postulates three functionally overlapping classes of gene activity to establish the identity of four organ types, but some plants, such as Aquilegia, exhibit variation in floral organ identity that suggests a more complex ABC program. Expression and yeast two-hybrid analyses as well as gene silencing reveal that canonical B class function has been elaborated in Aquilegia.

  8. Grini, Paul E.

    1. Open Access
      T-Loop Phosphorylation of Arabidopsis CDKA;1 Is Required for Its Function and Can Be Partially Substituted by an Aspartate Residue
      Nico Dissmeyer, Moritz K. Nowack, Stefan Pusch, Hilde Stals, Dirk Inzé, Paul E. Grini, Arp Schnittger
      Plant Cell Mar 2007, 19 (3) 972-985; DOI: https://doi.org/10.1105/tpc.107.050401

      To divide or not is one of the most crucial choices made by cells. As in other eukaryotes, progression through the cell cycle in plants is governed by cyclin-dependent kinases (CDKs), and one of the major regulatory inputs to CDK function is phosphorylation. Here, it is shown that Arabidopsis CDKA;1 is phosphorylated in the T-loop region and that phosphorylation is essential for kinase function.

  9. Gübitz, Thomas

    1. You have accessRestricted Access
      Single Gene–Mediated Shift in Pollinator Attraction in Petunia
      Maria Elena Hoballah, Thomas Gübitz, Jeroen Stuurman, Larissa Broger, Mario Barone, Therese Mandel, Alexandre Dell'Olivo, Maeva Arnold, Cris Kuhlemeier
      Plant Cell Mar 2007, 19 (3) 779-790; DOI: https://doi.org/10.1105/tpc.106.048694

      Many floral traits appear to be adapted to particular pollinators. AN2 is a well-defined myb-type transcription factor that is a major determinant of flower color variation between two Petunia species. Transformation of one species with AN2 from the other caused a switch in pollinator preference, suggesting that adaptation to a new pollinator may involve a limited number of genes of large effect.

H

  1. Hamberg, Mats

    1. You have accessRestricted Access
      Oxylipins Produced by the 9-Lipoxygenase Pathway in Arabidopsis Regulate Lateral Root Development and Defense Responses through a Specific Signaling Cascade
      Tamara Vellosillo, Marta Martínez, Miguel Angel López, Jorge Vicente, Tomas Cascón, Liam Dolan, Mats Hamberg, Carmen Castresana
      Plant Cell Mar 2007, 19 (3) 831-846; DOI: https://doi.org/10.1105/tpc.106.046052

      The importance of oxylipins, such as jasmonic acid, in plant defense and adaptation is well known. This work suggests that other oxylipins, such as 9-hydroxyoctadecatrienoic acid, also function in developmental and defense responses, such as callose and pectin deposition and production of reactive oxygen species. Mutant analyses revealed at least three signaling cascades mediating oxylipin action.

  2. Harpaz-Saad, Smadar

    1. You have accessRestricted Access
      Chlorophyllase Is a Rate-Limiting Enzyme in Chlorophyll Catabolism and Is Posttranslationally Regulated
      Smadar Harpaz-Saad, Tamar Azoulay, Tzahi Arazi, Eran Ben-Yaakov, Anahit Mett, Yoel M. Shiboleth, Stefan Hörtensteiner, David Gidoni, Amit Gal-On, Eliezer E. Goldschmidt, Yoram Eyal
      Plant Cell Mar 2007, 19 (3) 1007-1022; DOI: https://doi.org/10.1105/tpc.107.050633

      Chlorophyll is a central player in photosynthetic light harvesting, but details of chlorophyll catabolism and regulation are unresolved. Here, two different expression systems in two species were used to study the role and regulation of Chlase in chlorophyll catabolism. The results suggest that Chlase is a rate-limiting enzyme in chlorophyll catabolism controlled via posttranslational regulation.

  3. He, Guangcun

    1. Open Access
      Rice UDP-Glucose Pyrophosphorylase1 Is Essential for Pollen Callose Deposition and Its Cosuppression Results in a New Type of Thermosensitive Genic Male Sterility
      Rongzhi Chen, Xiao Zhao, Zhe Shao, Zhe Wei, Yuanyuan Wang, Lili Zhu, Jie Zhao, Mengxiang Sun, Ruifeng He, Guangcun He
      Plant Cell Mar 2007, 19 (3) 847-861; DOI: https://doi.org/10.1105/tpc.106.044123

      UDP-glucose pyrophosphorylase functions in carbohydrate metabolism and cell wall biosynthesis. Silencing of rice Ugp1 affects normal callose deposition during pollen mother cell (PMC) meiosis and leads to the degeneration of PMC at the early meiosis stage. This work demonstrates that rice Ugp1 is essential for PMC meiosis and microspore development.

  4. He, Kun

    1. You have accessRestricted Access
      Analysis of Transcription Factor HY5 Genomic Binding Sites Revealed Its Hierarchical Role in Light Regulation of Development
      Jungeun Lee, Kun He, Viktor Stolc, Horim Lee, Pablo Figueroa, Ying Gao, Waraporn Tongprasit, Hongyu Zhao, Ilha Lee, Xing Wang Deng
      Plant Cell Mar 2007, 19 (3) 731-749; DOI: https://doi.org/10.1105/tpc.106.047688

      Light signals induce complex developmental programs in plants. The transcription factor HY5 acts downstream of multiple photoreceptors, but its target genes are not well known. Putative HY5 binding sites were mapped to 3894 genes with diverse developmental functions, including early light-responsive genes. HY5 appears to be an early regulator of the transcriptional cascades for photomorphogenesis.

  5. He, Ruifeng

    1. Open Access
      Rice UDP-Glucose Pyrophosphorylase1 Is Essential for Pollen Callose Deposition and Its Cosuppression Results in a New Type of Thermosensitive Genic Male Sterility
      Rongzhi Chen, Xiao Zhao, Zhe Shao, Zhe Wei, Yuanyuan Wang, Lili Zhu, Jie Zhao, Mengxiang Sun, Ruifeng He, Guangcun He
      Plant Cell Mar 2007, 19 (3) 847-861; DOI: https://doi.org/10.1105/tpc.106.044123

      UDP-glucose pyrophosphorylase functions in carbohydrate metabolism and cell wall biosynthesis. Silencing of rice Ugp1 affects normal callose deposition during pollen mother cell (PMC) meiosis and leads to the degeneration of PMC at the early meiosis stage. This work demonstrates that rice Ugp1 is essential for PMC meiosis and microspore development.

  6. He, Yuke

    1. You have accessRestricted Access
      The N-Terminal Double-Stranded RNA Binding Domains of Arabidopsis HYPONASTIC LEAVES1 Are Sufficient for Pre-MicroRNA Processing
      Feijie Wu, Lin Yu, Wenguang Cao, Yanfei Mao, Zhongyuan Liu, Yuke He
      Plant Cell Mar 2007, 19 (3) 914-925; DOI: https://doi.org/10.1105/tpc.106.048637

      Some double-stranded RNA binding proteins participate in miRNA biogenesis. A series of deletion mutants demonstrated that the N-terminal region of HYPONASTIC LEAVES1 with two double-stranded RNA binding domains is sufficient for miRNA biogenesis and capable of rescuing the hyl1 phenotype. This study also showed that the putative NLS is a true nuclear localization signal.

  7. Hernández-Blanco, Camilo

    1. You have accessRestricted Access
      Impairment of Cellulose Synthases Required for Arabidopsis Secondary Cell Wall Formation Enhances Disease Resistance
      Camilo Hernández-Blanco, Dong Xin Feng, Jian Hu, Andrea Sánchez-Vallet, Laurent Deslandes, Francisco Llorente, Marta Berrocal-Lobo, Harald Keller, Xavier Barlet, Clara Sánchez-Rodríguez, Lisa K. Anderson, Shauna Somerville, Yves Marco, Antonio Molina
      Plant Cell Mar 2007, 19 (3) 890-903; DOI: https://doi.org/10.1105/tpc.106.048058

      Mutations in cellulose synthase subunits required for secondary cell wall formation confer resistance to bacterial and fungal pathogens and upregulate ABA-responsive defense genes. Alteration of secondary cell wall integrity by inhibiting cellulose synthesis may lead to activation of novel defense pathways that create antimicrobial-enriched environments hostile to pathogens.

  8. Hettenhausen, Christian

    1. You have accessRestricted Access
      Herbivory Rapidly Activates MAPK Signaling in Attacked and Unattacked Leaf Regions but Not between Leaves of Nicotiana attenuata
      Jianqiang Wu, Christian Hettenhausen, Stefan Meldau, Ian T. Baldwin
      Plant Cell Mar 2007, 19 (3) 1096-1122; DOI: https://doi.org/10.1105/tpc.106.049353

      Mitogen-activated protein kinase (MAPK) signaling mediates plant responses to herbivore attack, but the transduction of these signals is poorly understood. This work examines how plants deploy defense reactions and demonstrates that herbivore oral secretions (OS) dramatically amplify wound-induced MAPK activity and that fatty acid–amino acid conjugates in herbivore OS are the elicitors.

  9. Heyting, Christa

    1. Open Access
      The Mismatch Repair Protein MLH1 Marks a Subset of Strongly Interfering Crossovers in Tomato
      Franck G.P. Lhuissier, Hildo H. Offenberg, Peter E. Wittich, Norbert O.E. Vischer, Christa Heyting
      Plant Cell Mar 2007, 19 (3) 862-876; DOI: https://doi.org/10.1105/tpc.106.049106

      During meiosis, crossovers (COs) occur between homologous chromosomes, and CO positions are marked by protein complexes named late recombination nodules (LNs). This study shows that the mismatch repair protein MLH1 occurs in a specific subset of LNs and maps the chromosomal positions of the MLH1 foci. The maps of MLH1 foci and LNs could be valuable in various applications, including hybrid genetics.

  10. Hoballah, Maria Elena

    1. You have accessRestricted Access
      Single Gene–Mediated Shift in Pollinator Attraction in Petunia
      Maria Elena Hoballah, Thomas Gübitz, Jeroen Stuurman, Larissa Broger, Mario Barone, Therese Mandel, Alexandre Dell'Olivo, Maeva Arnold, Cris Kuhlemeier
      Plant Cell Mar 2007, 19 (3) 779-790; DOI: https://doi.org/10.1105/tpc.106.048694

      Many floral traits appear to be adapted to particular pollinators. AN2 is a well-defined myb-type transcription factor that is a major determinant of flower color variation between two Petunia species. Transformation of one species with AN2 from the other caused a switch in pollinator preference, suggesting that adaptation to a new pollinator may involve a limited number of genes of large effect.

  11. Holappa, Lynn

    1. You have accessRestricted Access
      Elaboration of B Gene Function to Include the Identity of Novel Floral Organs in the Lower Eudicot Aquilegia
      Elena M. Kramer, Lynn Holappa, Billie Gould, M. Alejandra Jaramillo, Dimitriy Setnikov, Philip M. Santiago
      Plant Cell Mar 2007, 19 (3) 750-766; DOI: https://doi.org/10.1105/tpc.107.050385

      The classical ABC model postulates three functionally overlapping classes of gene activity to establish the identity of four organ types, but some plants, such as Aquilegia, exhibit variation in floral organ identity that suggests a more complex ABC program. Expression and yeast two-hybrid analyses as well as gene silencing reveal that canonical B class function has been elaborated in Aquilegia.

  12. Hooker, Tanya S.

    1. You have accessRestricted Access
      A Core Subunit of the RNA-Processing/Degrading Exosome Specifically Influences Cuticular Wax Biosynthesis in Arabidopsis
      Tanya S. Hooker, Patricia Lam, Huanquan Zheng, Ljerka Kunst
      Plant Cell Mar 2007, 19 (3) 904-913; DOI: https://doi.org/10.1105/tpc.106.049304

      The cuticle, an extracellular matrix of cutin polyester and waxes, covers and protects plant aerial organs, but little is known about the regulation of cuticular wax deposition. Mutant analysis and gene isolation and characterization demonstrate that wax production is controlled, at least in part, by the mRNA stability of a repressor that is recognized and degraded by the CER7 ribonuclease.

  13. Hörtensteiner, Stefan

    1. You have accessRestricted Access
      Chlorophyllase Is a Rate-Limiting Enzyme in Chlorophyll Catabolism and Is Posttranslationally Regulated
      Smadar Harpaz-Saad, Tamar Azoulay, Tzahi Arazi, Eran Ben-Yaakov, Anahit Mett, Yoel M. Shiboleth, Stefan Hörtensteiner, David Gidoni, Amit Gal-On, Eliezer E. Goldschmidt, Yoram Eyal
      Plant Cell Mar 2007, 19 (3) 1007-1022; DOI: https://doi.org/10.1105/tpc.107.050633

      Chlorophyll is a central player in photosynthetic light harvesting, but details of chlorophyll catabolism and regulation are unresolved. Here, two different expression systems in two species were used to study the role and regulation of Chlase in chlorophyll catabolism. The results suggest that Chlase is a rate-limiting enzyme in chlorophyll catabolism controlled via posttranslational regulation.

  14. Howell, Miya D.

    1. Open Access
      Genome-Wide Analysis of the RNA-DEPENDENT RNA POLYMERASE6/DICER-LIKE4 Pathway in Arabidopsis Reveals Dependency on miRNA- and tasiRNA-Directed Targeting
      Miya D. Howell, Noah Fahlgren, Elisabeth J. Chapman, Jason S. Cumbie, Christopher M. Sullivan, Scott A. Givan, Kristin D. Kasschau, James C. Carrington
      Plant Cell Mar 2007, 19 (3) 926-942; DOI: https://doi.org/10.1105/tpc.107.050062

      Using high-throughput sequencing methods, many transcripts were found to be routed through the RDR6/DCL4-dependent silencing pathway after single or dual targeting events by miRNA or tasiRNA. Several members of a rapidly expanding clade of PPR gene transcripts were targeted, suggesting that this silencing pathway may function to buffer the effects of rapidly expanding gene families.

  15. Hu, Jian

    1. You have accessRestricted Access
      Impairment of Cellulose Synthases Required for Arabidopsis Secondary Cell Wall Formation Enhances Disease Resistance
      Camilo Hernández-Blanco, Dong Xin Feng, Jian Hu, Andrea Sánchez-Vallet, Laurent Deslandes, Francisco Llorente, Marta Berrocal-Lobo, Harald Keller, Xavier Barlet, Clara Sánchez-Rodríguez, Lisa K. Anderson, Shauna Somerville, Yves Marco, Antonio Molina
      Plant Cell Mar 2007, 19 (3) 890-903; DOI: https://doi.org/10.1105/tpc.106.048058

      Mutations in cellulose synthase subunits required for secondary cell wall formation confer resistance to bacterial and fungal pathogens and upregulate ABA-responsive defense genes. Alteration of secondary cell wall integrity by inhibiting cellulose synthesis may lead to activation of novel defense pathways that create antimicrobial-enriched environments hostile to pathogens.

I

  1. Ichimura, Kazuya

    1. Open Access
      The Mitogen-Activated Protein Kinase Cascade MKK3–MPK6 Is an Important Part of the Jasmonate Signal Transduction Pathway in Arabidopsis
      Fuminori Takahashi, Riichiro Yoshida, Kazuya Ichimura, Tsuyoshi Mizoguchi, Shigemi Seo, Masahiro Yonezawa, Kyonoshin Maruyama, Kazuko Yamaguchi-Shinozaki, Kazuo Shinozaki
      Plant Cell Mar 2007, 19 (3) 805-818; DOI: https://doi.org/10.1105/tpc.106.046581

      The hormone jasmonic acid (JA) functions in stress responses and plant development. This work identified the mitogen-activated protein kinase cascade, MKK3–MPK6, which is activated by JA, and indicates key roles for this kinase unit in the JA signaling pathway in processes such as root growth and negative regulation of the transcriptional activator ATMYC2.

  2. Inzé, Dirk

    1. Open Access
      T-Loop Phosphorylation of Arabidopsis CDKA;1 Is Required for Its Function and Can Be Partially Substituted by an Aspartate Residue
      Nico Dissmeyer, Moritz K. Nowack, Stefan Pusch, Hilde Stals, Dirk Inzé, Paul E. Grini, Arp Schnittger
      Plant Cell Mar 2007, 19 (3) 972-985; DOI: https://doi.org/10.1105/tpc.107.050401

      To divide or not is one of the most crucial choices made by cells. As in other eukaryotes, progression through the cell cycle in plants is governed by cyclin-dependent kinases (CDKs), and one of the major regulatory inputs to CDK function is phosphorylation. Here, it is shown that Arabidopsis CDKA;1 is phosphorylated in the T-loop region and that phosphorylation is essential for kinase function.

J

  1. Jaramillo, M. Alejandra

    1. You have accessRestricted Access
      Elaboration of B Gene Function to Include the Identity of Novel Floral Organs in the Lower Eudicot Aquilegia
      Elena M. Kramer, Lynn Holappa, Billie Gould, M. Alejandra Jaramillo, Dimitriy Setnikov, Philip M. Santiago
      Plant Cell Mar 2007, 19 (3) 750-766; DOI: https://doi.org/10.1105/tpc.107.050385

      The classical ABC model postulates three functionally overlapping classes of gene activity to establish the identity of four organ types, but some plants, such as Aquilegia, exhibit variation in floral organ identity that suggests a more complex ABC program. Expression and yeast two-hybrid analyses as well as gene silencing reveal that canonical B class function has been elaborated in Aquilegia.

  2. Jin, Lifeng

    1. You have accessRestricted Access
      Arabidopsis MICROTUBULE-ASSOCIATED PROTEIN18 Functions in Directional Cell Growth by Destabilizing Cortical Microtubules
      Xia Wang, Lei Zhu, Baoquan Liu, Che Wang, Lifeng Jin, Qian Zhao, Ming Yuan
      Plant Cell Mar 2007, 19 (3) 877-889; DOI: https://doi.org/10.1105/tpc.106.048579

      Mutations in microtubule-associated proteins (MAPs) result in abnormal plant development and plant cell morphogenesis due to disruption of microtubule (MT) organization. This study identified Arabidopsis MAP18, which binds to microtubules and inhibits tubulin polymerization, destabilizes MTs, and plays an important role in the regulation of MT organization to determine directional plant cell growth.

K

  1. Kapri-Pardes, Einat

    1. You have accessRestricted Access
      The Thylakoid Lumen Protease Deg1 Is Involved in the Repair of Photosystem II from Photoinhibition in Arabidopsis
      Einat Kapri-Pardes, Leah Naveh, Zach Adam
      Plant Cell Mar 2007, 19 (3) 1039-1047; DOI: https://doi.org/10.1105/tpc.106.046573

      Photosynthesis is accompanied by accumulation of highly oxidizing species and oxygen radicals that cause photodamage within the photosystem II complex. Removal of damaged copies of the D1 protein is a prerequisite for reassembly of this complex. RNAi mutant and other analyses suggest that the lumenal protease Deg1 is involved in degradation of the D1 protein during PSII repair from photoinhibition.

  2. Kasschau, Kristin D.

    1. Open Access
      Genome-Wide Analysis of the RNA-DEPENDENT RNA POLYMERASE6/DICER-LIKE4 Pathway in Arabidopsis Reveals Dependency on miRNA- and tasiRNA-Directed Targeting
      Miya D. Howell, Noah Fahlgren, Elisabeth J. Chapman, Jason S. Cumbie, Christopher M. Sullivan, Scott A. Givan, Kristin D. Kasschau, James C. Carrington
      Plant Cell Mar 2007, 19 (3) 926-942; DOI: https://doi.org/10.1105/tpc.107.050062

      Using high-throughput sequencing methods, many transcripts were found to be routed through the RDR6/DCL4-dependent silencing pathway after single or dual targeting events by miRNA or tasiRNA. Several members of a rapidly expanding clade of PPR gene transcripts were targeted, suggesting that this silencing pathway may function to buffer the effects of rapidly expanding gene families.

  3. Kawakita, Kazuhito

    1. Open Access
      Calcium-Dependent Protein Kinases Regulate the Production of Reactive Oxygen Species by Potato NADPH Oxidase
      Michie Kobayashi, Ikuko Ohura, Kazuhito Kawakita, Naohiko Yokota, Masayuki Fujiwara, Ko Shimamoto, Noriyuki Doke, Hirofumi Yoshioka
      Plant Cell Mar 2007, 19 (3) 1065-1080; DOI: https://doi.org/10.1105/tpc.106.048884

      The NADPH oxidase RBOH and calcium-dependent protein kinases (CDPKs) are implicated in rapid production of reactive oxygen species, or oxidative burst, early in plant–pathogen interactions, but the regulatory mechanisms are unknown. The results of this work suggest that Ca2+-dependent phosphorylation of potato RBOHB by CDPK5 plays a central role in oxidative burst during pathogen infection.

  4. Keller, Harald

    1. You have accessRestricted Access
      Impairment of Cellulose Synthases Required for Arabidopsis Secondary Cell Wall Formation Enhances Disease Resistance
      Camilo Hernández-Blanco, Dong Xin Feng, Jian Hu, Andrea Sánchez-Vallet, Laurent Deslandes, Francisco Llorente, Marta Berrocal-Lobo, Harald Keller, Xavier Barlet, Clara Sánchez-Rodríguez, Lisa K. Anderson, Shauna Somerville, Yves Marco, Antonio Molina
      Plant Cell Mar 2007, 19 (3) 890-903; DOI: https://doi.org/10.1105/tpc.106.048058

      Mutations in cellulose synthase subunits required for secondary cell wall formation confer resistance to bacterial and fungal pathogens and upregulate ABA-responsive defense genes. Alteration of secondary cell wall integrity by inhibiting cellulose synthesis may lead to activation of novel defense pathways that create antimicrobial-enriched environments hostile to pathogens.

  5. Kobayashi, Michie

    1. Open Access
      Calcium-Dependent Protein Kinases Regulate the Production of Reactive Oxygen Species by Potato NADPH Oxidase
      Michie Kobayashi, Ikuko Ohura, Kazuhito Kawakita, Naohiko Yokota, Masayuki Fujiwara, Ko Shimamoto, Noriyuki Doke, Hirofumi Yoshioka
      Plant Cell Mar 2007, 19 (3) 1065-1080; DOI: https://doi.org/10.1105/tpc.106.048884

      The NADPH oxidase RBOH and calcium-dependent protein kinases (CDPKs) are implicated in rapid production of reactive oxygen species, or oxidative burst, early in plant–pathogen interactions, but the regulatory mechanisms are unknown. The results of this work suggest that Ca2+-dependent phosphorylation of potato RBOHB by CDPK5 plays a central role in oxidative burst during pathogen infection.

  6. Komine, Yutaka

    1. Open Access
      Integration of Chloroplast Nucleic Acid Metabolism into the Phosphate Deprivation Response in Chlamydomonas reinhardtii
      Shlomit Yehudai-Resheff, Sara L. Zimmer, Yutaka Komine, David B. Stern
      Plant Cell Mar 2007, 19 (3) 1023-1038; DOI: https://doi.org/10.1105/tpc.106.045427

      The role of the chloroplast as a phosphorus (P) reservoir in acclimation to P limitation is not well known. Polynucleotide phosphorylase consumes P through RNA decay, and while P deprivation usually stimulates RNA decay, in Chlamydomonas chloroplasts RNA levels rise but DNA levels fall during acclimation, suggesting that chloroplast polyploidy may be adaptive as a repository for P.

  7. Kramer, Elena M.

    1. You have accessRestricted Access
      Elaboration of B Gene Function to Include the Identity of Novel Floral Organs in the Lower Eudicot Aquilegia
      Elena M. Kramer, Lynn Holappa, Billie Gould, M. Alejandra Jaramillo, Dimitriy Setnikov, Philip M. Santiago
      Plant Cell Mar 2007, 19 (3) 750-766; DOI: https://doi.org/10.1105/tpc.107.050385

      The classical ABC model postulates three functionally overlapping classes of gene activity to establish the identity of four organ types, but some plants, such as Aquilegia, exhibit variation in floral organ identity that suggests a more complex ABC program. Expression and yeast two-hybrid analyses as well as gene silencing reveal that canonical B class function has been elaborated in Aquilegia.

  8. Kuhlemeier, Cris

    1. You have accessRestricted Access
      Single Gene–Mediated Shift in Pollinator Attraction in Petunia
      Maria Elena Hoballah, Thomas Gübitz, Jeroen Stuurman, Larissa Broger, Mario Barone, Therese Mandel, Alexandre Dell'Olivo, Maeva Arnold, Cris Kuhlemeier
      Plant Cell Mar 2007, 19 (3) 779-790; DOI: https://doi.org/10.1105/tpc.106.048694

      Many floral traits appear to be adapted to particular pollinators. AN2 is a well-defined myb-type transcription factor that is a major determinant of flower color variation between two Petunia species. Transformation of one species with AN2 from the other caused a switch in pollinator preference, suggesting that adaptation to a new pollinator may involve a limited number of genes of large effect.

  9. Kühn, Kristina

    1. You have accessRestricted Access
      Arabidopsis Phage-Type RNA Polymerases: Accurate in Vitro Transcription of Organellar Genes
      Kristina Kühn, Alexandra-Viola Bohne, Karsten Liere, Andreas Weihe, Thomas Börner
      Plant Cell Mar 2007, 19 (3) 959-971; DOI: https://doi.org/10.1105/tpc.106.046839

      Three Arabidopsis nuclear-encoded T7 phage-type RNA polymerases (RNAPs) localize to mitochondria, plastids, or both. This study finds that two of them can initiate transcription from both mitochondrial and plastid promoters in vitro without auxiliary factors. The ability for promoter recognition appears to have been conserved over a long period of evolution of organellar RNAPs.

  10. Kunst, Ljerka

    1. You have accessRestricted Access
      A Core Subunit of the RNA-Processing/Degrading Exosome Specifically Influences Cuticular Wax Biosynthesis in Arabidopsis
      Tanya S. Hooker, Patricia Lam, Huanquan Zheng, Ljerka Kunst
      Plant Cell Mar 2007, 19 (3) 904-913; DOI: https://doi.org/10.1105/tpc.106.049304

      The cuticle, an extracellular matrix of cutin polyester and waxes, covers and protects plant aerial organs, but little is known about the regulation of cuticular wax deposition. Mutant analysis and gene isolation and characterization demonstrate that wax production is controlled, at least in part, by the mRNA stability of a repressor that is recognized and degraded by the CER7 ribonuclease.

L

  1. Lam, Patricia

    1. You have accessRestricted Access
      A Core Subunit of the RNA-Processing/Degrading Exosome Specifically Influences Cuticular Wax Biosynthesis in Arabidopsis
      Tanya S. Hooker, Patricia Lam, Huanquan Zheng, Ljerka Kunst
      Plant Cell Mar 2007, 19 (3) 904-913; DOI: https://doi.org/10.1105/tpc.106.049304

      The cuticle, an extracellular matrix of cutin polyester and waxes, covers and protects plant aerial organs, but little is known about the regulation of cuticular wax deposition. Mutant analysis and gene isolation and characterization demonstrate that wax production is controlled, at least in part, by the mRNA stability of a repressor that is recognized and degraded by the CER7 ribonuclease.

  2. Lanza, Mónica

    1. You have accessRestricted Access
      A Mutant of the Arabidopsis Phosphate Transporter PHT1;1 Displays Enhanced Arsenic Accumulation
      Pablo Catarecha, Ma Dolores Segura, José Manuel Franco-Zorrilla, Berenice García-Ponce, Mónica Lanza, Roberto Solano, Javier Paz-Ares, Antonio Leyva
      Plant Cell Mar 2007, 19 (3) 1123-1133; DOI: https://doi.org/10.1105/tpc.106.041871

      Arsenate [As(V)], the most abundant chemical form of the toxic element arsenic, is very similar to phosphate (Pi), which enables its uptake from the soil through the high-affinity Pi transport system. This work identifies a Pi transporter mutant with enhanced ability to accumulate arsenic but with a reduced Pi and As(V) uptake rate, suggesting a protective mechanism operating in arsenic-tolerant plants.

  3. Lee, Horim

    1. You have accessRestricted Access
      Analysis of Transcription Factor HY5 Genomic Binding Sites Revealed Its Hierarchical Role in Light Regulation of Development
      Jungeun Lee, Kun He, Viktor Stolc, Horim Lee, Pablo Figueroa, Ying Gao, Waraporn Tongprasit, Hongyu Zhao, Ilha Lee, Xing Wang Deng
      Plant Cell Mar 2007, 19 (3) 731-749; DOI: https://doi.org/10.1105/tpc.106.047688

      Light signals induce complex developmental programs in plants. The transcription factor HY5 acts downstream of multiple photoreceptors, but its target genes are not well known. Putative HY5 binding sites were mapped to 3894 genes with diverse developmental functions, including early light-responsive genes. HY5 appears to be an early regulator of the transcriptional cascades for photomorphogenesis.

  4. Lee, Ilha

    1. You have accessRestricted Access
      Analysis of Transcription Factor HY5 Genomic Binding Sites Revealed Its Hierarchical Role in Light Regulation of Development
      Jungeun Lee, Kun He, Viktor Stolc, Horim Lee, Pablo Figueroa, Ying Gao, Waraporn Tongprasit, Hongyu Zhao, Ilha Lee, Xing Wang Deng
      Plant Cell Mar 2007, 19 (3) 731-749; DOI: https://doi.org/10.1105/tpc.106.047688

      Light signals induce complex developmental programs in plants. The transcription factor HY5 acts downstream of multiple photoreceptors, but its target genes are not well known. Putative HY5 binding sites were mapped to 3894 genes with diverse developmental functions, including early light-responsive genes. HY5 appears to be an early regulator of the transcriptional cascades for photomorphogenesis.

  5. Lee, Jungeun

    1. You have accessRestricted Access
      Analysis of Transcription Factor HY5 Genomic Binding Sites Revealed Its Hierarchical Role in Light Regulation of Development
      Jungeun Lee, Kun He, Viktor Stolc, Horim Lee, Pablo Figueroa, Ying Gao, Waraporn Tongprasit, Hongyu Zhao, Ilha Lee, Xing Wang Deng
      Plant Cell Mar 2007, 19 (3) 731-749; DOI: https://doi.org/10.1105/tpc.106.047688

      Light signals induce complex developmental programs in plants. The transcription factor HY5 acts downstream of multiple photoreceptors, but its target genes are not well known. Putative HY5 binding sites were mapped to 3894 genes with diverse developmental functions, including early light-responsive genes. HY5 appears to be an early regulator of the transcriptional cascades for photomorphogenesis.

  6. Lemtiri-Chlieh, Fouad

    1. You have accessRestricted Access
      Death Don't Have No Mercy and Neither Does Calcium: Arabidopsis CYCLIC NUCLEOTIDE GATED CHANNEL2 and Innate Immunity
      Rashid Ali, Wei Ma, Fouad Lemtiri-Chlieh, Dimitrios Tsaltas, Qiang Leng, Susannne von Bodman, Gerald A. Berkowitz
      Plant Cell Mar 2007, 19 (3) 1081-1095; DOI: https://doi.org/10.1105/tpc.106.045096

      Plants lacking a Ca2+-conducting channel do not undergo hypersensitive response to pathogens and have impaired nitric oxide generation in response to application of a pathogen-associated molecular pattern elicitor. Patch clamp analysis demonstrated elicitor activation of inward cation currents; this work provides insights regarding early steps in pathogen response signaling in plants.

  7. Leng, Qiang

    1. You have accessRestricted Access
      Death Don't Have No Mercy and Neither Does Calcium: Arabidopsis CYCLIC NUCLEOTIDE GATED CHANNEL2 and Innate Immunity
      Rashid Ali, Wei Ma, Fouad Lemtiri-Chlieh, Dimitrios Tsaltas, Qiang Leng, Susannne von Bodman, Gerald A. Berkowitz
      Plant Cell Mar 2007, 19 (3) 1081-1095; DOI: https://doi.org/10.1105/tpc.106.045096

      Plants lacking a Ca2+-conducting channel do not undergo hypersensitive response to pathogens and have impaired nitric oxide generation in response to application of a pathogen-associated molecular pattern elicitor. Patch clamp analysis demonstrated elicitor activation of inward cation currents; this work provides insights regarding early steps in pathogen response signaling in plants.

  8. Leyva, Antonio

    1. You have accessRestricted Access
      A Mutant of the Arabidopsis Phosphate Transporter PHT1;1 Displays Enhanced Arsenic Accumulation
      Pablo Catarecha, Ma Dolores Segura, José Manuel Franco-Zorrilla, Berenice García-Ponce, Mónica Lanza, Roberto Solano, Javier Paz-Ares, Antonio Leyva
      Plant Cell Mar 2007, 19 (3) 1123-1133; DOI: https://doi.org/10.1105/tpc.106.041871

      Arsenate [As(V)], the most abundant chemical form of the toxic element arsenic, is very similar to phosphate (Pi), which enables its uptake from the soil through the high-affinity Pi transport system. This work identifies a Pi transporter mutant with enhanced ability to accumulate arsenic but with a reduced Pi and As(V) uptake rate, suggesting a protective mechanism operating in arsenic-tolerant plants.

  9. Lhuissier, Franck G.P.

    1. Open Access
      The Mismatch Repair Protein MLH1 Marks a Subset of Strongly Interfering Crossovers in Tomato
      Franck G.P. Lhuissier, Hildo H. Offenberg, Peter E. Wittich, Norbert O.E. Vischer, Christa Heyting
      Plant Cell Mar 2007, 19 (3) 862-876; DOI: https://doi.org/10.1105/tpc.106.049106

      During meiosis, crossovers (COs) occur between homologous chromosomes, and CO positions are marked by protein complexes named late recombination nodules (LNs). This study shows that the mismatch repair protein MLH1 occurs in a specific subset of LNs and maps the chromosomal positions of the MLH1 foci. The maps of MLH1 foci and LNs could be valuable in various applications, including hybrid genetics.

  10. Liere, Karsten

    1. You have accessRestricted Access
      Arabidopsis Phage-Type RNA Polymerases: Accurate in Vitro Transcription of Organellar Genes
      Kristina Kühn, Alexandra-Viola Bohne, Karsten Liere, Andreas Weihe, Thomas Börner
      Plant Cell Mar 2007, 19 (3) 959-971; DOI: https://doi.org/10.1105/tpc.106.046839

      Three Arabidopsis nuclear-encoded T7 phage-type RNA polymerases (RNAPs) localize to mitochondria, plastids, or both. This study finds that two of them can initiate transcription from both mitochondrial and plastid promoters in vitro without auxiliary factors. The ability for promoter recognition appears to have been conserved over a long period of evolution of organellar RNAPs.

  11. Liu, Baoquan

    1. You have accessRestricted Access
      Arabidopsis MICROTUBULE-ASSOCIATED PROTEIN18 Functions in Directional Cell Growth by Destabilizing Cortical Microtubules
      Xia Wang, Lei Zhu, Baoquan Liu, Che Wang, Lifeng Jin, Qian Zhao, Ming Yuan
      Plant Cell Mar 2007, 19 (3) 877-889; DOI: https://doi.org/10.1105/tpc.106.048579

      Mutations in microtubule-associated proteins (MAPs) result in abnormal plant development and plant cell morphogenesis due to disruption of microtubule (MT) organization. This study identified Arabidopsis MAP18, which binds to microtubules and inhibits tubulin polymerization, destabilizes MTs, and plays an important role in the regulation of MT organization to determine directional plant cell growth.

  12. Liu, Zhongyuan

    1. You have accessRestricted Access
      The N-Terminal Double-Stranded RNA Binding Domains of Arabidopsis HYPONASTIC LEAVES1 Are Sufficient for Pre-MicroRNA Processing
      Feijie Wu, Lin Yu, Wenguang Cao, Yanfei Mao, Zhongyuan Liu, Yuke He
      Plant Cell Mar 2007, 19 (3) 914-925; DOI: https://doi.org/10.1105/tpc.106.048637

      Some double-stranded RNA binding proteins participate in miRNA biogenesis. A series of deletion mutants demonstrated that the N-terminal region of HYPONASTIC LEAVES1 with two double-stranded RNA binding domains is sufficient for miRNA biogenesis and capable of rescuing the hyl1 phenotype. This study also showed that the putative NLS is a true nuclear localization signal.

  13. Llorente, Francisco

    1. You have accessRestricted Access
      Impairment of Cellulose Synthases Required for Arabidopsis Secondary Cell Wall Formation Enhances Disease Resistance
      Camilo Hernández-Blanco, Dong Xin Feng, Jian Hu, Andrea Sánchez-Vallet, Laurent Deslandes, Francisco Llorente, Marta Berrocal-Lobo, Harald Keller, Xavier Barlet, Clara Sánchez-Rodríguez, Lisa K. Anderson, Shauna Somerville, Yves Marco, Antonio Molina
      Plant Cell Mar 2007, 19 (3) 890-903; DOI: https://doi.org/10.1105/tpc.106.048058

      Mutations in cellulose synthase subunits required for secondary cell wall formation confer resistance to bacterial and fungal pathogens and upregulate ABA-responsive defense genes. Alteration of secondary cell wall integrity by inhibiting cellulose synthesis may lead to activation of novel defense pathways that create antimicrobial-enriched environments hostile to pathogens.

  14. López, Miguel Angel

    1. You have accessRestricted Access
      Oxylipins Produced by the 9-Lipoxygenase Pathway in Arabidopsis Regulate Lateral Root Development and Defense Responses through a Specific Signaling Cascade
      Tamara Vellosillo, Marta Martínez, Miguel Angel López, Jorge Vicente, Tomas Cascón, Liam Dolan, Mats Hamberg, Carmen Castresana
      Plant Cell Mar 2007, 19 (3) 831-846; DOI: https://doi.org/10.1105/tpc.106.046052

      The importance of oxylipins, such as jasmonic acid, in plant defense and adaptation is well known. This work suggests that other oxylipins, such as 9-hydroxyoctadecatrienoic acid, also function in developmental and defense responses, such as callose and pectin deposition and production of reactive oxygen species. Mutant analyses revealed at least three signaling cascades mediating oxylipin action.

  15. Luo, Zhenghua

    1. You have accessRestricted Access
      Improperly Terminated, Unpolyadenylated mRNA of Sense Transgenes Is Targeted by RDR6-Mediated RNA Silencing in Arabidopsis
      Zhenghua Luo, Zhixiang Chen
      Plant Cell Mar 2007, 19 (3) 943-958; DOI: https://doi.org/10.1105/tpc.106.045724

      RNA silencing induced by sense transgenes may protect against excessively expressed genes, but whether all transcripts or just aberrant ones activate genome surveillance is unclear. Constructs with enhanced or reduced production of aberrant RNAs were tested and showed RNA-DEPENDENT RNA POLYMERASE6–mediated silencing induced by aberrant mRNAs, which probably act as templates for the RNA polymerase.

M

  1. Ma, Wei

    1. You have accessRestricted Access
      Death Don't Have No Mercy and Neither Does Calcium: Arabidopsis CYCLIC NUCLEOTIDE GATED CHANNEL2 and Innate Immunity
      Rashid Ali, Wei Ma, Fouad Lemtiri-Chlieh, Dimitrios Tsaltas, Qiang Leng, Susannne von Bodman, Gerald A. Berkowitz
      Plant Cell Mar 2007, 19 (3) 1081-1095; DOI: https://doi.org/10.1105/tpc.106.045096

      Plants lacking a Ca2+-conducting channel do not undergo hypersensitive response to pathogens and have impaired nitric oxide generation in response to application of a pathogen-associated molecular pattern elicitor. Patch clamp analysis demonstrated elicitor activation of inward cation currents; this work provides insights regarding early steps in pathogen response signaling in plants.

  2. Mandel, Therese

    1. You have accessRestricted Access
      Single Gene–Mediated Shift in Pollinator Attraction in Petunia
      Maria Elena Hoballah, Thomas Gübitz, Jeroen Stuurman, Larissa Broger, Mario Barone, Therese Mandel, Alexandre Dell'Olivo, Maeva Arnold, Cris Kuhlemeier
      Plant Cell Mar 2007, 19 (3) 779-790; DOI: https://doi.org/10.1105/tpc.106.048694

      Many floral traits appear to be adapted to particular pollinators. AN2 is a well-defined myb-type transcription factor that is a major determinant of flower color variation between two Petunia species. Transformation of one species with AN2 from the other caused a switch in pollinator preference, suggesting that adaptation to a new pollinator may involve a limited number of genes of large effect.

  3. Mao, Yanfei

    1. You have accessRestricted Access
      The N-Terminal Double-Stranded RNA Binding Domains of Arabidopsis HYPONASTIC LEAVES1 Are Sufficient for Pre-MicroRNA Processing
      Feijie Wu, Lin Yu, Wenguang Cao, Yanfei Mao, Zhongyuan Liu, Yuke He
      Plant Cell Mar 2007, 19 (3) 914-925; DOI: https://doi.org/10.1105/tpc.106.048637

      Some double-stranded RNA binding proteins participate in miRNA biogenesis. A series of deletion mutants demonstrated that the N-terminal region of HYPONASTIC LEAVES1 with two double-stranded RNA binding domains is sufficient for miRNA biogenesis and capable of rescuing the hyl1 phenotype. This study also showed that the putative NLS is a true nuclear localization signal.

  4. Marco, Yves

    1. You have accessRestricted Access
      Impairment of Cellulose Synthases Required for Arabidopsis Secondary Cell Wall Formation Enhances Disease Resistance
      Camilo Hernández-Blanco, Dong Xin Feng, Jian Hu, Andrea Sánchez-Vallet, Laurent Deslandes, Francisco Llorente, Marta Berrocal-Lobo, Harald Keller, Xavier Barlet, Clara Sánchez-Rodríguez, Lisa K. Anderson, Shauna Somerville, Yves Marco, Antonio Molina
      Plant Cell Mar 2007, 19 (3) 890-903; DOI: https://doi.org/10.1105/tpc.106.048058

      Mutations in cellulose synthase subunits required for secondary cell wall formation confer resistance to bacterial and fungal pathogens and upregulate ABA-responsive defense genes. Alteration of secondary cell wall integrity by inhibiting cellulose synthesis may lead to activation of novel defense pathways that create antimicrobial-enriched environments hostile to pathogens.

  5. Marion-Poll, Annie

    1. You have accessRestricted Access
      The Arabidopsis aba4-1 Mutant Reveals a Specific Function for Neoxanthin in Protection against Photooxidative Stress
      Luca Dall'Osto, Stefano Cazzaniga, Helen North, Annie Marion-Poll, Roberto Bassi
      Plant Cell Mar 2007, 19 (3) 1048-1064; DOI: https://doi.org/10.1105/tpc.106.049114

      Carotenoids help protect the chloroplast from photoxidative stress. The aba4-1 mutant lacks neoxanthin but retains all other xanthophyll species. This research shows that neoxanthin plays a specific role in protection of Lhc proteins, the PSII reaction center, and thylakoids from photooxidative stress and protects against the damaging effects of reactive oxygen species, particularly superoxide anions.

  6. Martínez, Marta

    1. You have accessRestricted Access
      Oxylipins Produced by the 9-Lipoxygenase Pathway in Arabidopsis Regulate Lateral Root Development and Defense Responses through a Specific Signaling Cascade
      Tamara Vellosillo, Marta Martínez, Miguel Angel López, Jorge Vicente, Tomas Cascón, Liam Dolan, Mats Hamberg, Carmen Castresana
      Plant Cell Mar 2007, 19 (3) 831-846; DOI: https://doi.org/10.1105/tpc.106.046052

      The importance of oxylipins, such as jasmonic acid, in plant defense and adaptation is well known. This work suggests that other oxylipins, such as 9-hydroxyoctadecatrienoic acid, also function in developmental and defense responses, such as callose and pectin deposition and production of reactive oxygen species. Mutant analyses revealed at least three signaling cascades mediating oxylipin action.

  7. Maruyama, Kyonoshin

    1. Open Access
      The Mitogen-Activated Protein Kinase Cascade MKK3–MPK6 Is an Important Part of the Jasmonate Signal Transduction Pathway in Arabidopsis
      Fuminori Takahashi, Riichiro Yoshida, Kazuya Ichimura, Tsuyoshi Mizoguchi, Shigemi Seo, Masahiro Yonezawa, Kyonoshin Maruyama, Kazuko Yamaguchi-Shinozaki, Kazuo Shinozaki
      Plant Cell Mar 2007, 19 (3) 805-818; DOI: https://doi.org/10.1105/tpc.106.046581

      The hormone jasmonic acid (JA) functions in stress responses and plant development. This work identified the mitogen-activated protein kinase cascade, MKK3–MPK6, which is activated by JA, and indicates key roles for this kinase unit in the JA signaling pathway in processes such as root growth and negative regulation of the transcriptional activator ATMYC2.

  8. Meda, Anderson R.

    1. You have accessRestricted Access
      PIC1, an Ancient Permease in Arabidopsis Chloroplasts, Mediates Iron Transport
      Daniela Duy, Gerhard Wanner, Anderson R. Meda, Nicolaus von Wirén, Jürgen Soll, Katrin Philippar
      Plant Cell Mar 2007, 19 (3) 986-1006; DOI: https://doi.org/10.1105/tpc.106.047407

      Chloroplasts are a major sink for metal ions like iron and copper, which play essential roles in photosynthetic electron transport. However, very little is known about iron uptake by the chloroplast. This study characterized PIC1 from Arabidopsis, which is a transmembrane protein of cyanobacterial origin that most likely functions as a metal ion permease in the chloroplast envelope.

  9. Meldau, Stefan

    1. You have accessRestricted Access
      Herbivory Rapidly Activates MAPK Signaling in Attacked and Unattacked Leaf Regions but Not between Leaves of Nicotiana attenuata
      Jianqiang Wu, Christian Hettenhausen, Stefan Meldau, Ian T. Baldwin
      Plant Cell Mar 2007, 19 (3) 1096-1122; DOI: https://doi.org/10.1105/tpc.106.049353

      Mitogen-activated protein kinase (MAPK) signaling mediates plant responses to herbivore attack, but the transduction of these signals is poorly understood. This work examines how plants deploy defense reactions and demonstrates that herbivore oral secretions (OS) dramatically amplify wound-induced MAPK activity and that fatty acid–amino acid conjugates in herbivore OS are the elicitors.

  10. Mett, Anahit

    1. You have accessRestricted Access
      Chlorophyllase Is a Rate-Limiting Enzyme in Chlorophyll Catabolism and Is Posttranslationally Regulated
      Smadar Harpaz-Saad, Tamar Azoulay, Tzahi Arazi, Eran Ben-Yaakov, Anahit Mett, Yoel M. Shiboleth, Stefan Hörtensteiner, David Gidoni, Amit Gal-On, Eliezer E. Goldschmidt, Yoram Eyal
      Plant Cell Mar 2007, 19 (3) 1007-1022; DOI: https://doi.org/10.1105/tpc.107.050633

      Chlorophyll is a central player in photosynthetic light harvesting, but details of chlorophyll catabolism and regulation are unresolved. Here, two different expression systems in two species were used to study the role and regulation of Chlase in chlorophyll catabolism. The results suggest that Chlase is a rate-limiting enzyme in chlorophyll catabolism controlled via posttranslational regulation.

  11. Miao, Ying

    1. You have accessRestricted Access
      The Antagonist Function of Arabidopsis WRKY53 and ESR/ESP in Leaf Senescence Is Modulated by the Jasmonic and Salicylic Acid Equilibrium
      Ying Miao, Ulrike Zentgraf
      Plant Cell Mar 2007, 19 (3) 819-830; DOI: https://doi.org/10.1105/tpc.106.042705

      Crosstalk between salicylic acid (SA) and jasmonic acid (JA) in leaf senescence is not well-known. This work shows that the senescence-specific transcription factor WRKY53 is positively regulated by SA and negatively by JA signaling and that the antagonistically regulated EPITHIOSPECIFYING SENESCENCE REGULATOR functions in the cytoplasm in nitrile biosynthesis but in the nucleus as an interaction partner with WRKY53.

  12. Mizoguchi, Tsuyoshi

    1. Open Access
      The Mitogen-Activated Protein Kinase Cascade MKK3–MPK6 Is an Important Part of the Jasmonate Signal Transduction Pathway in Arabidopsis
      Fuminori Takahashi, Riichiro Yoshida, Kazuya Ichimura, Tsuyoshi Mizoguchi, Shigemi Seo, Masahiro Yonezawa, Kyonoshin Maruyama, Kazuko Yamaguchi-Shinozaki, Kazuo Shinozaki
      Plant Cell Mar 2007, 19 (3) 805-818; DOI: https://doi.org/10.1105/tpc.106.046581

      The hormone jasmonic acid (JA) functions in stress responses and plant development. This work identified the mitogen-activated protein kinase cascade, MKK3–MPK6, which is activated by JA, and indicates key roles for this kinase unit in the JA signaling pathway in processes such as root growth and negative regulation of the transcriptional activator ATMYC2.

  13. Molina, Antonio

    1. You have accessRestricted Access
      Impairment of Cellulose Synthases Required for Arabidopsis Secondary Cell Wall Formation Enhances Disease Resistance
      Camilo Hernández-Blanco, Dong Xin Feng, Jian Hu, Andrea Sánchez-Vallet, Laurent Deslandes, Francisco Llorente, Marta Berrocal-Lobo, Harald Keller, Xavier Barlet, Clara Sánchez-Rodríguez, Lisa K. Anderson, Shauna Somerville, Yves Marco, Antonio Molina
      Plant Cell Mar 2007, 19 (3) 890-903; DOI: https://doi.org/10.1105/tpc.106.048058

      Mutations in cellulose synthase subunits required for secondary cell wall formation confer resistance to bacterial and fungal pathogens and upregulate ABA-responsive defense genes. Alteration of secondary cell wall integrity by inhibiting cellulose synthesis may lead to activation of novel defense pathways that create antimicrobial-enriched environments hostile to pathogens.

N

  1. Naveh, Leah

    1. You have accessRestricted Access
      The Thylakoid Lumen Protease Deg1 Is Involved in the Repair of Photosystem II from Photoinhibition in Arabidopsis
      Einat Kapri-Pardes, Leah Naveh, Zach Adam
      Plant Cell Mar 2007, 19 (3) 1039-1047; DOI: https://doi.org/10.1105/tpc.106.046573

      Photosynthesis is accompanied by accumulation of highly oxidizing species and oxygen radicals that cause photodamage within the photosystem II complex. Removal of damaged copies of the D1 protein is a prerequisite for reassembly of this complex. RNAi mutant and other analyses suggest that the lumenal protease Deg1 is involved in degradation of the D1 protein during PSII repair from photoinhibition.

  2. North, Helen

    1. You have accessRestricted Access
      The Arabidopsis aba4-1 Mutant Reveals a Specific Function for Neoxanthin in Protection against Photooxidative Stress
      Luca Dall'Osto, Stefano Cazzaniga, Helen North, Annie Marion-Poll, Roberto Bassi
      Plant Cell Mar 2007, 19 (3) 1048-1064; DOI: https://doi.org/10.1105/tpc.106.049114

      Carotenoids help protect the chloroplast from photoxidative stress. The aba4-1 mutant lacks neoxanthin but retains all other xanthophyll species. This research shows that neoxanthin plays a specific role in protection of Lhc proteins, the PSII reaction center, and thylakoids from photooxidative stress and protects against the damaging effects of reactive oxygen species, particularly superoxide anions.

  3. Nowack, Moritz K.

    1. Open Access
      T-Loop Phosphorylation of Arabidopsis CDKA;1 Is Required for Its Function and Can Be Partially Substituted by an Aspartate Residue
      Nico Dissmeyer, Moritz K. Nowack, Stefan Pusch, Hilde Stals, Dirk Inzé, Paul E. Grini, Arp Schnittger
      Plant Cell Mar 2007, 19 (3) 972-985; DOI: https://doi.org/10.1105/tpc.107.050401

      To divide or not is one of the most crucial choices made by cells. As in other eukaryotes, progression through the cell cycle in plants is governed by cyclin-dependent kinases (CDKs), and one of the major regulatory inputs to CDK function is phosphorylation. Here, it is shown that Arabidopsis CDKA;1 is phosphorylated in the T-loop region and that phosphorylation is essential for kinase function.

O

  1. Offenberg, Hildo H.

    1. Open Access
      The Mismatch Repair Protein MLH1 Marks a Subset of Strongly Interfering Crossovers in Tomato
      Franck G.P. Lhuissier, Hildo H. Offenberg, Peter E. Wittich, Norbert O.E. Vischer, Christa Heyting
      Plant Cell Mar 2007, 19 (3) 862-876; DOI: https://doi.org/10.1105/tpc.106.049106

      During meiosis, crossovers (COs) occur between homologous chromosomes, and CO positions are marked by protein complexes named late recombination nodules (LNs). This study shows that the mismatch repair protein MLH1 occurs in a specific subset of LNs and maps the chromosomal positions of the MLH1 foci. The maps of MLH1 foci and LNs could be valuable in various applications, including hybrid genetics.

  2. Ohura, Ikuko

    1. Open Access
      Calcium-Dependent Protein Kinases Regulate the Production of Reactive Oxygen Species by Potato NADPH Oxidase
      Michie Kobayashi, Ikuko Ohura, Kazuhito Kawakita, Naohiko Yokota, Masayuki Fujiwara, Ko Shimamoto, Noriyuki Doke, Hirofumi Yoshioka
      Plant Cell Mar 2007, 19 (3) 1065-1080; DOI: https://doi.org/10.1105/tpc.106.048884

      The NADPH oxidase RBOH and calcium-dependent protein kinases (CDPKs) are implicated in rapid production of reactive oxygen species, or oxidative burst, early in plant–pathogen interactions, but the regulatory mechanisms are unknown. The results of this work suggest that Ca2+-dependent phosphorylation of potato RBOHB by CDPK5 plays a central role in oxidative burst during pathogen infection.

P

  1. Paz-Ares, Javier

    1. You have accessRestricted Access
      A Mutant of the Arabidopsis Phosphate Transporter PHT1;1 Displays Enhanced Arsenic Accumulation
      Pablo Catarecha, Ma Dolores Segura, José Manuel Franco-Zorrilla, Berenice García-Ponce, Mónica Lanza, Roberto Solano, Javier Paz-Ares, Antonio Leyva
      Plant Cell Mar 2007, 19 (3) 1123-1133; DOI: https://doi.org/10.1105/tpc.106.041871

      Arsenate [As(V)], the most abundant chemical form of the toxic element arsenic, is very similar to phosphate (Pi), which enables its uptake from the soil through the high-affinity Pi transport system. This work identifies a Pi transporter mutant with enhanced ability to accumulate arsenic but with a reduced Pi and As(V) uptake rate, suggesting a protective mechanism operating in arsenic-tolerant plants.

  2. Philippar, Katrin

    1. You have accessRestricted Access
      PIC1, an Ancient Permease in Arabidopsis Chloroplasts, Mediates Iron Transport
      Daniela Duy, Gerhard Wanner, Anderson R. Meda, Nicolaus von Wirén, Jürgen Soll, Katrin Philippar
      Plant Cell Mar 2007, 19 (3) 986-1006; DOI: https://doi.org/10.1105/tpc.106.047407

      Chloroplasts are a major sink for metal ions like iron and copper, which play essential roles in photosynthetic electron transport. However, very little is known about iron uptake by the chloroplast. This study characterized PIC1 from Arabidopsis, which is a transmembrane protein of cyanobacterial origin that most likely functions as a metal ion permease in the chloroplast envelope.

  3. Pusch, Stefan

    1. Open Access
      T-Loop Phosphorylation of Arabidopsis CDKA;1 Is Required for Its Function and Can Be Partially Substituted by an Aspartate Residue
      Nico Dissmeyer, Moritz K. Nowack, Stefan Pusch, Hilde Stals, Dirk Inzé, Paul E. Grini, Arp Schnittger
      Plant Cell Mar 2007, 19 (3) 972-985; DOI: https://doi.org/10.1105/tpc.107.050401

      To divide or not is one of the most crucial choices made by cells. As in other eukaryotes, progression through the cell cycle in plants is governed by cyclin-dependent kinases (CDKs), and one of the major regulatory inputs to CDK function is phosphorylation. Here, it is shown that Arabidopsis CDKA;1 is phosphorylated in the T-loop region and that phosphorylation is essential for kinase function.

S

  1. Sánchez-Rodríguez, Clara

    1. You have accessRestricted Access
      Impairment of Cellulose Synthases Required for Arabidopsis Secondary Cell Wall Formation Enhances Disease Resistance
      Camilo Hernández-Blanco, Dong Xin Feng, Jian Hu, Andrea Sánchez-Vallet, Laurent Deslandes, Francisco Llorente, Marta Berrocal-Lobo, Harald Keller, Xavier Barlet, Clara Sánchez-Rodríguez, Lisa K. Anderson, Shauna Somerville, Yves Marco, Antonio Molina
      Plant Cell Mar 2007, 19 (3) 890-903; DOI: https://doi.org/10.1105/tpc.106.048058

      Mutations in cellulose synthase subunits required for secondary cell wall formation confer resistance to bacterial and fungal pathogens and upregulate ABA-responsive defense genes. Alteration of secondary cell wall integrity by inhibiting cellulose synthesis may lead to activation of novel defense pathways that create antimicrobial-enriched environments hostile to pathogens.

  2. Sánchez-Vallet, Andrea

    1. You have accessRestricted Access
      Impairment of Cellulose Synthases Required for Arabidopsis Secondary Cell Wall Formation Enhances Disease Resistance
      Camilo Hernández-Blanco, Dong Xin Feng, Jian Hu, Andrea Sánchez-Vallet, Laurent Deslandes, Francisco Llorente, Marta Berrocal-Lobo, Harald Keller, Xavier Barlet, Clara Sánchez-Rodríguez, Lisa K. Anderson, Shauna Somerville, Yves Marco, Antonio Molina
      Plant Cell Mar 2007, 19 (3) 890-903; DOI: https://doi.org/10.1105/tpc.106.048058

      Mutations in cellulose synthase subunits required for secondary cell wall formation confer resistance to bacterial and fungal pathogens and upregulate ABA-responsive defense genes. Alteration of secondary cell wall integrity by inhibiting cellulose synthesis may lead to activation of novel defense pathways that create antimicrobial-enriched environments hostile to pathogens.

  3. Santiago, Philip M.

    1. You have accessRestricted Access
      Elaboration of B Gene Function to Include the Identity of Novel Floral Organs in the Lower Eudicot Aquilegia
      Elena M. Kramer, Lynn Holappa, Billie Gould, M. Alejandra Jaramillo, Dimitriy Setnikov, Philip M. Santiago
      Plant Cell Mar 2007, 19 (3) 750-766; DOI: https://doi.org/10.1105/tpc.107.050385

      The classical ABC model postulates three functionally overlapping classes of gene activity to establish the identity of four organ types, but some plants, such as Aquilegia, exhibit variation in floral organ identity that suggests a more complex ABC program. Expression and yeast two-hybrid analyses as well as gene silencing reveal that canonical B class function has been elaborated in Aquilegia.

  4. Schnittger, Arp

    1. Open Access
      T-Loop Phosphorylation of Arabidopsis CDKA;1 Is Required for Its Function and Can Be Partially Substituted by an Aspartate Residue
      Nico Dissmeyer, Moritz K. Nowack, Stefan Pusch, Hilde Stals, Dirk Inzé, Paul E. Grini, Arp Schnittger
      Plant Cell Mar 2007, 19 (3) 972-985; DOI: https://doi.org/10.1105/tpc.107.050401

      To divide or not is one of the most crucial choices made by cells. As in other eukaryotes, progression through the cell cycle in plants is governed by cyclin-dependent kinases (CDKs), and one of the major regulatory inputs to CDK function is phosphorylation. Here, it is shown that Arabidopsis CDKA;1 is phosphorylated in the T-loop region and that phosphorylation is essential for kinase function.

  5. Segura, Ma Dolores

    1. You have accessRestricted Access
      A Mutant of the Arabidopsis Phosphate Transporter PHT1;1 Displays Enhanced Arsenic Accumulation
      Pablo Catarecha, Ma Dolores Segura, José Manuel Franco-Zorrilla, Berenice García-Ponce, Mónica Lanza, Roberto Solano, Javier Paz-Ares, Antonio Leyva
      Plant Cell Mar 2007, 19 (3) 1123-1133; DOI: https://doi.org/10.1105/tpc.106.041871

      Arsenate [As(V)], the most abundant chemical form of the toxic element arsenic, is very similar to phosphate (Pi), which enables its uptake from the soil through the high-affinity Pi transport system. This work identifies a Pi transporter mutant with enhanced ability to accumulate arsenic but with a reduced Pi and As(V) uptake rate, suggesting a protective mechanism operating in arsenic-tolerant plants.

  6. Seo, Shigemi

    1. Open Access
      The Mitogen-Activated Protein Kinase Cascade MKK3–MPK6 Is an Important Part of the Jasmonate Signal Transduction Pathway in Arabidopsis
      Fuminori Takahashi, Riichiro Yoshida, Kazuya Ichimura, Tsuyoshi Mizoguchi, Shigemi Seo, Masahiro Yonezawa, Kyonoshin Maruyama, Kazuko Yamaguchi-Shinozaki, Kazuo Shinozaki
      Plant Cell Mar 2007, 19 (3) 805-818; DOI: https://doi.org/10.1105/tpc.106.046581

      The hormone jasmonic acid (JA) functions in stress responses and plant development. This work identified the mitogen-activated protein kinase cascade, MKK3–MPK6, which is activated by JA, and indicates key roles for this kinase unit in the JA signaling pathway in processes such as root growth and negative regulation of the transcriptional activator ATMYC2.

  7. Setnikov, Dimitriy

    1. You have accessRestricted Access
      Elaboration of B Gene Function to Include the Identity of Novel Floral Organs in the Lower Eudicot Aquilegia
      Elena M. Kramer, Lynn Holappa, Billie Gould, M. Alejandra Jaramillo, Dimitriy Setnikov, Philip M. Santiago
      Plant Cell Mar 2007, 19 (3) 750-766; DOI: https://doi.org/10.1105/tpc.107.050385

      The classical ABC model postulates three functionally overlapping classes of gene activity to establish the identity of four organ types, but some plants, such as Aquilegia, exhibit variation in floral organ identity that suggests a more complex ABC program. Expression and yeast two-hybrid analyses as well as gene silencing reveal that canonical B class function has been elaborated in Aquilegia.

  8. Shao, Zhe

    1. Open Access
      Rice UDP-Glucose Pyrophosphorylase1 Is Essential for Pollen Callose Deposition and Its Cosuppression Results in a New Type of Thermosensitive Genic Male Sterility
      Rongzhi Chen, Xiao Zhao, Zhe Shao, Zhe Wei, Yuanyuan Wang, Lili Zhu, Jie Zhao, Mengxiang Sun, Ruifeng He, Guangcun He
      Plant Cell Mar 2007, 19 (3) 847-861; DOI: https://doi.org/10.1105/tpc.106.044123

      UDP-glucose pyrophosphorylase functions in carbohydrate metabolism and cell wall biosynthesis. Silencing of rice Ugp1 affects normal callose deposition during pollen mother cell (PMC) meiosis and leads to the degeneration of PMC at the early meiosis stage. This work demonstrates that rice Ugp1 is essential for PMC meiosis and microspore development.

  9. Shiboleth, Yoel M.

    1. You have accessRestricted Access
      Chlorophyllase Is a Rate-Limiting Enzyme in Chlorophyll Catabolism and Is Posttranslationally Regulated
      Smadar Harpaz-Saad, Tamar Azoulay, Tzahi Arazi, Eran Ben-Yaakov, Anahit Mett, Yoel M. Shiboleth, Stefan Hörtensteiner, David Gidoni, Amit Gal-On, Eliezer E. Goldschmidt, Yoram Eyal
      Plant Cell Mar 2007, 19 (3) 1007-1022; DOI: https://doi.org/10.1105/tpc.107.050633

      Chlorophyll is a central player in photosynthetic light harvesting, but details of chlorophyll catabolism and regulation are unresolved. Here, two different expression systems in two species were used to study the role and regulation of Chlase in chlorophyll catabolism. The results suggest that Chlase is a rate-limiting enzyme in chlorophyll catabolism controlled via posttranslational regulation.

  10. Shimamoto, Ko

    1. Open Access
      Calcium-Dependent Protein Kinases Regulate the Production of Reactive Oxygen Species by Potato NADPH Oxidase
      Michie Kobayashi, Ikuko Ohura, Kazuhito Kawakita, Naohiko Yokota, Masayuki Fujiwara, Ko Shimamoto, Noriyuki Doke, Hirofumi Yoshioka
      Plant Cell Mar 2007, 19 (3) 1065-1080; DOI: https://doi.org/10.1105/tpc.106.048884

      The NADPH oxidase RBOH and calcium-dependent protein kinases (CDPKs) are implicated in rapid production of reactive oxygen species, or oxidative burst, early in plant–pathogen interactions, but the regulatory mechanisms are unknown. The results of this work suggest that Ca2+-dependent phosphorylation of potato RBOHB by CDPK5 plays a central role in oxidative burst during pathogen infection.

  11. Shinozaki, Kazuo

    1. Open Access
      The Mitogen-Activated Protein Kinase Cascade MKK3–MPK6 Is an Important Part of the Jasmonate Signal Transduction Pathway in Arabidopsis
      Fuminori Takahashi, Riichiro Yoshida, Kazuya Ichimura, Tsuyoshi Mizoguchi, Shigemi Seo, Masahiro Yonezawa, Kyonoshin Maruyama, Kazuko Yamaguchi-Shinozaki, Kazuo Shinozaki
      Plant Cell Mar 2007, 19 (3) 805-818; DOI: https://doi.org/10.1105/tpc.106.046581

      The hormone jasmonic acid (JA) functions in stress responses and plant development. This work identified the mitogen-activated protein kinase cascade, MKK3–MPK6, which is activated by JA, and indicates key roles for this kinase unit in the JA signaling pathway in processes such as root growth and negative regulation of the transcriptional activator ATMYC2.

  12. Solano, Roberto

    1. You have accessRestricted Access
      A Mutant of the Arabidopsis Phosphate Transporter PHT1;1 Displays Enhanced Arsenic Accumulation
      Pablo Catarecha, Ma Dolores Segura, José Manuel Franco-Zorrilla, Berenice García-Ponce, Mónica Lanza, Roberto Solano, Javier Paz-Ares, Antonio Leyva
      Plant Cell Mar 2007, 19 (3) 1123-1133; DOI: https://doi.org/10.1105/tpc.106.041871

      Arsenate [As(V)], the most abundant chemical form of the toxic element arsenic, is very similar to phosphate (Pi), which enables its uptake from the soil through the high-affinity Pi transport system. This work identifies a Pi transporter mutant with enhanced ability to accumulate arsenic but with a reduced Pi and As(V) uptake rate, suggesting a protective mechanism operating in arsenic-tolerant plants.

  13. Soll, Jürgen

    1. You have accessRestricted Access
      PIC1, an Ancient Permease in Arabidopsis Chloroplasts, Mediates Iron Transport
      Daniela Duy, Gerhard Wanner, Anderson R. Meda, Nicolaus von Wirén, Jürgen Soll, Katrin Philippar
      Plant Cell Mar 2007, 19 (3) 986-1006; DOI: https://doi.org/10.1105/tpc.106.047407

      Chloroplasts are a major sink for metal ions like iron and copper, which play essential roles in photosynthetic electron transport. However, very little is known about iron uptake by the chloroplast. This study characterized PIC1 from Arabidopsis, which is a transmembrane protein of cyanobacterial origin that most likely functions as a metal ion permease in the chloroplast envelope.

  14. Somerville, Shauna

    1. You have accessRestricted Access
      Impairment of Cellulose Synthases Required for Arabidopsis Secondary Cell Wall Formation Enhances Disease Resistance
      Camilo Hernández-Blanco, Dong Xin Feng, Jian Hu, Andrea Sánchez-Vallet, Laurent Deslandes, Francisco Llorente, Marta Berrocal-Lobo, Harald Keller, Xavier Barlet, Clara Sánchez-Rodríguez, Lisa K. Anderson, Shauna Somerville, Yves Marco, Antonio Molina
      Plant Cell Mar 2007, 19 (3) 890-903; DOI: https://doi.org/10.1105/tpc.106.048058

      Mutations in cellulose synthase subunits required for secondary cell wall formation confer resistance to bacterial and fungal pathogens and upregulate ABA-responsive defense genes. Alteration of secondary cell wall integrity by inhibiting cellulose synthesis may lead to activation of novel defense pathways that create antimicrobial-enriched environments hostile to pathogens.

  15. Stals, Hilde

    1. Open Access
      T-Loop Phosphorylation of Arabidopsis CDKA;1 Is Required for Its Function and Can Be Partially Substituted by an Aspartate Residue
      Nico Dissmeyer, Moritz K. Nowack, Stefan Pusch, Hilde Stals, Dirk Inzé, Paul E. Grini, Arp Schnittger
      Plant Cell Mar 2007, 19 (3) 972-985; DOI: https://doi.org/10.1105/tpc.107.050401

      To divide or not is one of the most crucial choices made by cells. As in other eukaryotes, progression through the cell cycle in plants is governed by cyclin-dependent kinases (CDKs), and one of the major regulatory inputs to CDK function is phosphorylation. Here, it is shown that Arabidopsis CDKA;1 is phosphorylated in the T-loop region and that phosphorylation is essential for kinase function.

  16. Steber, Camille M.

    1. You have accessRestricted Access
      Seed Germination of GA-Insensitive sleepy1 Mutants Does Not Require RGL2 Protein Disappearance in Arabidopsis
      Tohru Ariizumi, Camille M. Steber
      Plant Cell Mar 2007, 19 (3) 791-804; DOI: https://doi.org/10.1105/tpc.106.048009

      Proper regulation of seed dormancy and germination is critical to plant survival. It was thought that disappearance of the negative regulator RGA-LIKE2 (RGL2) protein is required for seed germination. This report finds instead that RGL2 accumulates in germinating sleepy1 (sly1) mutants, suggesting that protein disappearance is not the only mechanism that relieves RGL2 repression of seed germination.

  17. Stern, David B.

    1. Open Access
      Integration of Chloroplast Nucleic Acid Metabolism into the Phosphate Deprivation Response in Chlamydomonas reinhardtii
      Shlomit Yehudai-Resheff, Sara L. Zimmer, Yutaka Komine, David B. Stern
      Plant Cell Mar 2007, 19 (3) 1023-1038; DOI: https://doi.org/10.1105/tpc.106.045427

      The role of the chloroplast as a phosphorus (P) reservoir in acclimation to P limitation is not well known. Polynucleotide phosphorylase consumes P through RNA decay, and while P deprivation usually stimulates RNA decay, in Chlamydomonas chloroplasts RNA levels rise but DNA levels fall during acclimation, suggesting that chloroplast polyploidy may be adaptive as a repository for P.

  18. Stolc, Viktor

    1. You have accessRestricted Access
      Analysis of Transcription Factor HY5 Genomic Binding Sites Revealed Its Hierarchical Role in Light Regulation of Development
      Jungeun Lee, Kun He, Viktor Stolc, Horim Lee, Pablo Figueroa, Ying Gao, Waraporn Tongprasit, Hongyu Zhao, Ilha Lee, Xing Wang Deng
      Plant Cell Mar 2007, 19 (3) 731-749; DOI: https://doi.org/10.1105/tpc.106.047688

      Light signals induce complex developmental programs in plants. The transcription factor HY5 acts downstream of multiple photoreceptors, but its target genes are not well known. Putative HY5 binding sites were mapped to 3894 genes with diverse developmental functions, including early light-responsive genes. HY5 appears to be an early regulator of the transcriptional cascades for photomorphogenesis.

  19. Stuurman, Jeroen

    1. You have accessRestricted Access
      Single Gene–Mediated Shift in Pollinator Attraction in Petunia
      Maria Elena Hoballah, Thomas Gübitz, Jeroen Stuurman, Larissa Broger, Mario Barone, Therese Mandel, Alexandre Dell'Olivo, Maeva Arnold, Cris Kuhlemeier
      Plant Cell Mar 2007, 19 (3) 779-790; DOI: https://doi.org/10.1105/tpc.106.048694

      Many floral traits appear to be adapted to particular pollinators. AN2 is a well-defined myb-type transcription factor that is a major determinant of flower color variation between two Petunia species. Transformation of one species with AN2 from the other caused a switch in pollinator preference, suggesting that adaptation to a new pollinator may involve a limited number of genes of large effect.

  20. Sullivan, Christopher M.

    1. Open Access
      Genome-Wide Analysis of the RNA-DEPENDENT RNA POLYMERASE6/DICER-LIKE4 Pathway in Arabidopsis Reveals Dependency on miRNA- and tasiRNA-Directed Targeting
      Miya D. Howell, Noah Fahlgren, Elisabeth J. Chapman, Jason S. Cumbie, Christopher M. Sullivan, Scott A. Givan, Kristin D. Kasschau, James C. Carrington
      Plant Cell Mar 2007, 19 (3) 926-942; DOI: https://doi.org/10.1105/tpc.107.050062

      Using high-throughput sequencing methods, many transcripts were found to be routed through the RDR6/DCL4-dependent silencing pathway after single or dual targeting events by miRNA or tasiRNA. Several members of a rapidly expanding clade of PPR gene transcripts were targeted, suggesting that this silencing pathway may function to buffer the effects of rapidly expanding gene families.

  21. Sun, Mengxiang

    1. Open Access
      Rice UDP-Glucose Pyrophosphorylase1 Is Essential for Pollen Callose Deposition and Its Cosuppression Results in a New Type of Thermosensitive Genic Male Sterility
      Rongzhi Chen, Xiao Zhao, Zhe Shao, Zhe Wei, Yuanyuan Wang, Lili Zhu, Jie Zhao, Mengxiang Sun, Ruifeng He, Guangcun He
      Plant Cell Mar 2007, 19 (3) 847-861; DOI: https://doi.org/10.1105/tpc.106.044123

      UDP-glucose pyrophosphorylase functions in carbohydrate metabolism and cell wall biosynthesis. Silencing of rice Ugp1 affects normal callose deposition during pollen mother cell (PMC) meiosis and leads to the degeneration of PMC at the early meiosis stage. This work demonstrates that rice Ugp1 is essential for PMC meiosis and microspore development.

T

  1. Takahashi, Fuminori

    1. Open Access
      The Mitogen-Activated Protein Kinase Cascade MKK3–MPK6 Is an Important Part of the Jasmonate Signal Transduction Pathway in Arabidopsis
      Fuminori Takahashi, Riichiro Yoshida, Kazuya Ichimura, Tsuyoshi Mizoguchi, Shigemi Seo, Masahiro Yonezawa, Kyonoshin Maruyama, Kazuko Yamaguchi-Shinozaki, Kazuo Shinozaki
      Plant Cell Mar 2007, 19 (3) 805-818; DOI: https://doi.org/10.1105/tpc.106.046581

      The hormone jasmonic acid (JA) functions in stress responses and plant development. This work identified the mitogen-activated protein kinase cascade, MKK3–MPK6, which is activated by JA, and indicates key roles for this kinase unit in the JA signaling pathway in processes such as root growth and negative regulation of the transcriptional activator ATMYC2.

  2. Tongprasit, Waraporn

    1. You have accessRestricted Access
      Analysis of Transcription Factor HY5 Genomic Binding Sites Revealed Its Hierarchical Role in Light Regulation of Development
      Jungeun Lee, Kun He, Viktor Stolc, Horim Lee, Pablo Figueroa, Ying Gao, Waraporn Tongprasit, Hongyu Zhao, Ilha Lee, Xing Wang Deng
      Plant Cell Mar 2007, 19 (3) 731-749; DOI: https://doi.org/10.1105/tpc.106.047688

      Light signals induce complex developmental programs in plants. The transcription factor HY5 acts downstream of multiple photoreceptors, but its target genes are not well known. Putative HY5 binding sites were mapped to 3894 genes with diverse developmental functions, including early light-responsive genes. HY5 appears to be an early regulator of the transcriptional cascades for photomorphogenesis.

  3. Tsaltas, Dimitrios

    1. You have accessRestricted Access
      Death Don't Have No Mercy and Neither Does Calcium: Arabidopsis CYCLIC NUCLEOTIDE GATED CHANNEL2 and Innate Immunity
      Rashid Ali, Wei Ma, Fouad Lemtiri-Chlieh, Dimitrios Tsaltas, Qiang Leng, Susannne von Bodman, Gerald A. Berkowitz
      Plant Cell Mar 2007, 19 (3) 1081-1095; DOI: https://doi.org/10.1105/tpc.106.045096

      Plants lacking a Ca2+-conducting channel do not undergo hypersensitive response to pathogens and have impaired nitric oxide generation in response to application of a pathogen-associated molecular pattern elicitor. Patch clamp analysis demonstrated elicitor activation of inward cation currents; this work provides insights regarding early steps in pathogen response signaling in plants.

V

  1. Vellosillo, Tamara

    1. You have accessRestricted Access
      Oxylipins Produced by the 9-Lipoxygenase Pathway in Arabidopsis Regulate Lateral Root Development and Defense Responses through a Specific Signaling Cascade
      Tamara Vellosillo, Marta Martínez, Miguel Angel López, Jorge Vicente, Tomas Cascón, Liam Dolan, Mats Hamberg, Carmen Castresana
      Plant Cell Mar 2007, 19 (3) 831-846; DOI: https://doi.org/10.1105/tpc.106.046052

      The importance of oxylipins, such as jasmonic acid, in plant defense and adaptation is well known. This work suggests that other oxylipins, such as 9-hydroxyoctadecatrienoic acid, also function in developmental and defense responses, such as callose and pectin deposition and production of reactive oxygen species. Mutant analyses revealed at least three signaling cascades mediating oxylipin action.

  2. Vicente, Jorge

    1. You have accessRestricted Access
      Oxylipins Produced by the 9-Lipoxygenase Pathway in Arabidopsis Regulate Lateral Root Development and Defense Responses through a Specific Signaling Cascade
      Tamara Vellosillo, Marta Martínez, Miguel Angel López, Jorge Vicente, Tomas Cascón, Liam Dolan, Mats Hamberg, Carmen Castresana
      Plant Cell Mar 2007, 19 (3) 831-846; DOI: https://doi.org/10.1105/tpc.106.046052

      The importance of oxylipins, such as jasmonic acid, in plant defense and adaptation is well known. This work suggests that other oxylipins, such as 9-hydroxyoctadecatrienoic acid, also function in developmental and defense responses, such as callose and pectin deposition and production of reactive oxygen species. Mutant analyses revealed at least three signaling cascades mediating oxylipin action.

  3. Vischer, Norbert O.E.

    1. Open Access
      The Mismatch Repair Protein MLH1 Marks a Subset of Strongly Interfering Crossovers in Tomato
      Franck G.P. Lhuissier, Hildo H. Offenberg, Peter E. Wittich, Norbert O.E. Vischer, Christa Heyting
      Plant Cell Mar 2007, 19 (3) 862-876; DOI: https://doi.org/10.1105/tpc.106.049106

      During meiosis, crossovers (COs) occur between homologous chromosomes, and CO positions are marked by protein complexes named late recombination nodules (LNs). This study shows that the mismatch repair protein MLH1 occurs in a specific subset of LNs and maps the chromosomal positions of the MLH1 foci. The maps of MLH1 foci and LNs could be valuable in various applications, including hybrid genetics.

  4. von Bodman, Susannne

    1. You have accessRestricted Access
      Death Don't Have No Mercy and Neither Does Calcium: Arabidopsis CYCLIC NUCLEOTIDE GATED CHANNEL2 and Innate Immunity
      Rashid Ali, Wei Ma, Fouad Lemtiri-Chlieh, Dimitrios Tsaltas, Qiang Leng, Susannne von Bodman, Gerald A. Berkowitz
      Plant Cell Mar 2007, 19 (3) 1081-1095; DOI: https://doi.org/10.1105/tpc.106.045096

      Plants lacking a Ca2+-conducting channel do not undergo hypersensitive response to pathogens and have impaired nitric oxide generation in response to application of a pathogen-associated molecular pattern elicitor. Patch clamp analysis demonstrated elicitor activation of inward cation currents; this work provides insights regarding early steps in pathogen response signaling in plants.

  5. von Wirén, Nicolaus

    1. You have accessRestricted Access
      PIC1, an Ancient Permease in Arabidopsis Chloroplasts, Mediates Iron Transport
      Daniela Duy, Gerhard Wanner, Anderson R. Meda, Nicolaus von Wirén, Jürgen Soll, Katrin Philippar
      Plant Cell Mar 2007, 19 (3) 986-1006; DOI: https://doi.org/10.1105/tpc.106.047407

      Chloroplasts are a major sink for metal ions like iron and copper, which play essential roles in photosynthetic electron transport. However, very little is known about iron uptake by the chloroplast. This study characterized PIC1 from Arabidopsis, which is a transmembrane protein of cyanobacterial origin that most likely functions as a metal ion permease in the chloroplast envelope.

W

  1. Wang, Che

    1. You have accessRestricted Access
      Arabidopsis MICROTUBULE-ASSOCIATED PROTEIN18 Functions in Directional Cell Growth by Destabilizing Cortical Microtubules
      Xia Wang, Lei Zhu, Baoquan Liu, Che Wang, Lifeng Jin, Qian Zhao, Ming Yuan
      Plant Cell Mar 2007, 19 (3) 877-889; DOI: https://doi.org/10.1105/tpc.106.048579

      Mutations in microtubule-associated proteins (MAPs) result in abnormal plant development and plant cell morphogenesis due to disruption of microtubule (MT) organization. This study identified Arabidopsis MAP18, which binds to microtubules and inhibits tubulin polymerization, destabilizes MTs, and plays an important role in the regulation of MT organization to determine directional plant cell growth.

  2. Wang, Xia

    1. You have accessRestricted Access
      Arabidopsis MICROTUBULE-ASSOCIATED PROTEIN18 Functions in Directional Cell Growth by Destabilizing Cortical Microtubules
      Xia Wang, Lei Zhu, Baoquan Liu, Che Wang, Lifeng Jin, Qian Zhao, Ming Yuan
      Plant Cell Mar 2007, 19 (3) 877-889; DOI: https://doi.org/10.1105/tpc.106.048579

      Mutations in microtubule-associated proteins (MAPs) result in abnormal plant development and plant cell morphogenesis due to disruption of microtubule (MT) organization. This study identified Arabidopsis MAP18, which binds to microtubules and inhibits tubulin polymerization, destabilizes MTs, and plays an important role in the regulation of MT organization to determine directional plant cell growth.

  3. Wang, Yuanyuan

    1. Open Access
      Rice UDP-Glucose Pyrophosphorylase1 Is Essential for Pollen Callose Deposition and Its Cosuppression Results in a New Type of Thermosensitive Genic Male Sterility
      Rongzhi Chen, Xiao Zhao, Zhe Shao, Zhe Wei, Yuanyuan Wang, Lili Zhu, Jie Zhao, Mengxiang Sun, Ruifeng He, Guangcun He
      Plant Cell Mar 2007, 19 (3) 847-861; DOI: https://doi.org/10.1105/tpc.106.044123

      UDP-glucose pyrophosphorylase functions in carbohydrate metabolism and cell wall biosynthesis. Silencing of rice Ugp1 affects normal callose deposition during pollen mother cell (PMC) meiosis and leads to the degeneration of PMC at the early meiosis stage. This work demonstrates that rice Ugp1 is essential for PMC meiosis and microspore development.

  4. Wanner, Gerhard

    1. You have accessRestricted Access
      PIC1, an Ancient Permease in Arabidopsis Chloroplasts, Mediates Iron Transport
      Daniela Duy, Gerhard Wanner, Anderson R. Meda, Nicolaus von Wirén, Jürgen Soll, Katrin Philippar
      Plant Cell Mar 2007, 19 (3) 986-1006; DOI: https://doi.org/10.1105/tpc.106.047407

      Chloroplasts are a major sink for metal ions like iron and copper, which play essential roles in photosynthetic electron transport. However, very little is known about iron uptake by the chloroplast. This study characterized PIC1 from Arabidopsis, which is a transmembrane protein of cyanobacterial origin that most likely functions as a metal ion permease in the chloroplast envelope.

  5. Wei, Zhe

    1. Open Access
      Rice UDP-Glucose Pyrophosphorylase1 Is Essential for Pollen Callose Deposition and Its Cosuppression Results in a New Type of Thermosensitive Genic Male Sterility
      Rongzhi Chen, Xiao Zhao, Zhe Shao, Zhe Wei, Yuanyuan Wang, Lili Zhu, Jie Zhao, Mengxiang Sun, Ruifeng He, Guangcun He
      Plant Cell Mar 2007, 19 (3) 847-861; DOI: https://doi.org/10.1105/tpc.106.044123

      UDP-glucose pyrophosphorylase functions in carbohydrate metabolism and cell wall biosynthesis. Silencing of rice Ugp1 affects normal callose deposition during pollen mother cell (PMC) meiosis and leads to the degeneration of PMC at the early meiosis stage. This work demonstrates that rice Ugp1 is essential for PMC meiosis and microspore development.

  6. Weihe, Andreas

    1. You have accessRestricted Access
      Arabidopsis Phage-Type RNA Polymerases: Accurate in Vitro Transcription of Organellar Genes
      Kristina Kühn, Alexandra-Viola Bohne, Karsten Liere, Andreas Weihe, Thomas Börner
      Plant Cell Mar 2007, 19 (3) 959-971; DOI: https://doi.org/10.1105/tpc.106.046839

      Three Arabidopsis nuclear-encoded T7 phage-type RNA polymerases (RNAPs) localize to mitochondria, plastids, or both. This study finds that two of them can initiate transcription from both mitochondrial and plastid promoters in vitro without auxiliary factors. The ability for promoter recognition appears to have been conserved over a long period of evolution of organellar RNAPs.

  7. Wittich, Peter E.

    1. Open Access
      The Mismatch Repair Protein MLH1 Marks a Subset of Strongly Interfering Crossovers in Tomato
      Franck G.P. Lhuissier, Hildo H. Offenberg, Peter E. Wittich, Norbert O.E. Vischer, Christa Heyting
      Plant Cell Mar 2007, 19 (3) 862-876; DOI: https://doi.org/10.1105/tpc.106.049106

      During meiosis, crossovers (COs) occur between homologous chromosomes, and CO positions are marked by protein complexes named late recombination nodules (LNs). This study shows that the mismatch repair protein MLH1 occurs in a specific subset of LNs and maps the chromosomal positions of the MLH1 foci. The maps of MLH1 foci and LNs could be valuable in various applications, including hybrid genetics.

  8. Wu, Feijie

    1. You have accessRestricted Access
      The N-Terminal Double-Stranded RNA Binding Domains of Arabidopsis HYPONASTIC LEAVES1 Are Sufficient for Pre-MicroRNA Processing
      Feijie Wu, Lin Yu, Wenguang Cao, Yanfei Mao, Zhongyuan Liu, Yuke He
      Plant Cell Mar 2007, 19 (3) 914-925; DOI: https://doi.org/10.1105/tpc.106.048637

      Some double-stranded RNA binding proteins participate in miRNA biogenesis. A series of deletion mutants demonstrated that the N-terminal region of HYPONASTIC LEAVES1 with two double-stranded RNA binding domains is sufficient for miRNA biogenesis and capable of rescuing the hyl1 phenotype. This study also showed that the putative NLS is a true nuclear localization signal.

  9. Wu, Jianqiang

    1. You have accessRestricted Access
      Herbivory Rapidly Activates MAPK Signaling in Attacked and Unattacked Leaf Regions but Not between Leaves of Nicotiana attenuata
      Jianqiang Wu, Christian Hettenhausen, Stefan Meldau, Ian T. Baldwin
      Plant Cell Mar 2007, 19 (3) 1096-1122; DOI: https://doi.org/10.1105/tpc.106.049353

      Mitogen-activated protein kinase (MAPK) signaling mediates plant responses to herbivore attack, but the transduction of these signals is poorly understood. This work examines how plants deploy defense reactions and demonstrates that herbivore oral secretions (OS) dramatically amplify wound-induced MAPK activity and that fatty acid–amino acid conjugates in herbivore OS are the elicitors.

Y

  1. Yamaguchi-Shinozaki, Kazuko

    1. Open Access
      The Mitogen-Activated Protein Kinase Cascade MKK3–MPK6 Is an Important Part of the Jasmonate Signal Transduction Pathway in Arabidopsis
      Fuminori Takahashi, Riichiro Yoshida, Kazuya Ichimura, Tsuyoshi Mizoguchi, Shigemi Seo, Masahiro Yonezawa, Kyonoshin Maruyama, Kazuko Yamaguchi-Shinozaki, Kazuo Shinozaki
      Plant Cell Mar 2007, 19 (3) 805-818; DOI: https://doi.org/10.1105/tpc.106.046581

      The hormone jasmonic acid (JA) functions in stress responses and plant development. This work identified the mitogen-activated protein kinase cascade, MKK3–MPK6, which is activated by JA, and indicates key roles for this kinase unit in the JA signaling pathway in processes such as root growth and negative regulation of the transcriptional activator ATMYC2.

  2. Yehudai-Resheff, Shlomit

    1. Open Access
      Integration of Chloroplast Nucleic Acid Metabolism into the Phosphate Deprivation Response in Chlamydomonas reinhardtii
      Shlomit Yehudai-Resheff, Sara L. Zimmer, Yutaka Komine, David B. Stern
      Plant Cell Mar 2007, 19 (3) 1023-1038; DOI: https://doi.org/10.1105/tpc.106.045427

      The role of the chloroplast as a phosphorus (P) reservoir in acclimation to P limitation is not well known. Polynucleotide phosphorylase consumes P through RNA decay, and while P deprivation usually stimulates RNA decay, in Chlamydomonas chloroplasts RNA levels rise but DNA levels fall during acclimation, suggesting that chloroplast polyploidy may be adaptive as a repository for P.

  3. Yokota, Naohiko

    1. Open Access
      Calcium-Dependent Protein Kinases Regulate the Production of Reactive Oxygen Species by Potato NADPH Oxidase
      Michie Kobayashi, Ikuko Ohura, Kazuhito Kawakita, Naohiko Yokota, Masayuki Fujiwara, Ko Shimamoto, Noriyuki Doke, Hirofumi Yoshioka
      Plant Cell Mar 2007, 19 (3) 1065-1080; DOI: https://doi.org/10.1105/tpc.106.048884

      The NADPH oxidase RBOH and calcium-dependent protein kinases (CDPKs) are implicated in rapid production of reactive oxygen species, or oxidative burst, early in plant–pathogen interactions, but the regulatory mechanisms are unknown. The results of this work suggest that Ca2+-dependent phosphorylation of potato RBOHB by CDPK5 plays a central role in oxidative burst during pathogen infection.

  4. Yonezawa, Masahiro

    1. Open Access
      The Mitogen-Activated Protein Kinase Cascade MKK3–MPK6 Is an Important Part of the Jasmonate Signal Transduction Pathway in Arabidopsis
      Fuminori Takahashi, Riichiro Yoshida, Kazuya Ichimura, Tsuyoshi Mizoguchi, Shigemi Seo, Masahiro Yonezawa, Kyonoshin Maruyama, Kazuko Yamaguchi-Shinozaki, Kazuo Shinozaki
      Plant Cell Mar 2007, 19 (3) 805-818; DOI: https://doi.org/10.1105/tpc.106.046581

      The hormone jasmonic acid (JA) functions in stress responses and plant development. This work identified the mitogen-activated protein kinase cascade, MKK3–MPK6, which is activated by JA, and indicates key roles for this kinase unit in the JA signaling pathway in processes such as root growth and negative regulation of the transcriptional activator ATMYC2.

  5. Yoshida, Riichiro

    1. Open Access
      The Mitogen-Activated Protein Kinase Cascade MKK3–MPK6 Is an Important Part of the Jasmonate Signal Transduction Pathway in Arabidopsis
      Fuminori Takahashi, Riichiro Yoshida, Kazuya Ichimura, Tsuyoshi Mizoguchi, Shigemi Seo, Masahiro Yonezawa, Kyonoshin Maruyama, Kazuko Yamaguchi-Shinozaki, Kazuo Shinozaki
      Plant Cell Mar 2007, 19 (3) 805-818; DOI: https://doi.org/10.1105/tpc.106.046581

      The hormone jasmonic acid (JA) functions in stress responses and plant development. This work identified the mitogen-activated protein kinase cascade, MKK3–MPK6, which is activated by JA, and indicates key roles for this kinase unit in the JA signaling pathway in processes such as root growth and negative regulation of the transcriptional activator ATMYC2.

  6. Yoshioka, Hirofumi

    1. Open Access
      Calcium-Dependent Protein Kinases Regulate the Production of Reactive Oxygen Species by Potato NADPH Oxidase
      Michie Kobayashi, Ikuko Ohura, Kazuhito Kawakita, Naohiko Yokota, Masayuki Fujiwara, Ko Shimamoto, Noriyuki Doke, Hirofumi Yoshioka
      Plant Cell Mar 2007, 19 (3) 1065-1080; DOI: https://doi.org/10.1105/tpc.106.048884

      The NADPH oxidase RBOH and calcium-dependent protein kinases (CDPKs) are implicated in rapid production of reactive oxygen species, or oxidative burst, early in plant–pathogen interactions, but the regulatory mechanisms are unknown. The results of this work suggest that Ca2+-dependent phosphorylation of potato RBOHB by CDPK5 plays a central role in oxidative burst during pathogen infection.

  7. Yu, Lin

    1. You have accessRestricted Access
      The N-Terminal Double-Stranded RNA Binding Domains of Arabidopsis HYPONASTIC LEAVES1 Are Sufficient for Pre-MicroRNA Processing
      Feijie Wu, Lin Yu, Wenguang Cao, Yanfei Mao, Zhongyuan Liu, Yuke He
      Plant Cell Mar 2007, 19 (3) 914-925; DOI: https://doi.org/10.1105/tpc.106.048637

      Some double-stranded RNA binding proteins participate in miRNA biogenesis. A series of deletion mutants demonstrated that the N-terminal region of HYPONASTIC LEAVES1 with two double-stranded RNA binding domains is sufficient for miRNA biogenesis and capable of rescuing the hyl1 phenotype. This study also showed that the putative NLS is a true nuclear localization signal.

  8. Yuan, Ming

    1. You have accessRestricted Access
      Arabidopsis MICROTUBULE-ASSOCIATED PROTEIN18 Functions in Directional Cell Growth by Destabilizing Cortical Microtubules
      Xia Wang, Lei Zhu, Baoquan Liu, Che Wang, Lifeng Jin, Qian Zhao, Ming Yuan
      Plant Cell Mar 2007, 19 (3) 877-889; DOI: https://doi.org/10.1105/tpc.106.048579

      Mutations in microtubule-associated proteins (MAPs) result in abnormal plant development and plant cell morphogenesis due to disruption of microtubule (MT) organization. This study identified Arabidopsis MAP18, which binds to microtubules and inhibits tubulin polymerization, destabilizes MTs, and plays an important role in the regulation of MT organization to determine directional plant cell growth.

Z

  1. Zentgraf, Ulrike

    1. You have accessRestricted Access
      The Antagonist Function of Arabidopsis WRKY53 and ESR/ESP in Leaf Senescence Is Modulated by the Jasmonic and Salicylic Acid Equilibrium
      Ying Miao, Ulrike Zentgraf
      Plant Cell Mar 2007, 19 (3) 819-830; DOI: https://doi.org/10.1105/tpc.106.042705

      Crosstalk between salicylic acid (SA) and jasmonic acid (JA) in leaf senescence is not well-known. This work shows that the senescence-specific transcription factor WRKY53 is positively regulated by SA and negatively by JA signaling and that the antagonistically regulated EPITHIOSPECIFYING SENESCENCE REGULATOR functions in the cytoplasm in nitrile biosynthesis but in the nucleus as an interaction partner with WRKY53.

  2. Zhao, Hongyu

    1. You have accessRestricted Access
      Analysis of Transcription Factor HY5 Genomic Binding Sites Revealed Its Hierarchical Role in Light Regulation of Development
      Jungeun Lee, Kun He, Viktor Stolc, Horim Lee, Pablo Figueroa, Ying Gao, Waraporn Tongprasit, Hongyu Zhao, Ilha Lee, Xing Wang Deng
      Plant Cell Mar 2007, 19 (3) 731-749; DOI: https://doi.org/10.1105/tpc.106.047688

      Light signals induce complex developmental programs in plants. The transcription factor HY5 acts downstream of multiple photoreceptors, but its target genes are not well known. Putative HY5 binding sites were mapped to 3894 genes with diverse developmental functions, including early light-responsive genes. HY5 appears to be an early regulator of the transcriptional cascades for photomorphogenesis.

  3. Zhao, Jie

    1. Open Access
      Rice UDP-Glucose Pyrophosphorylase1 Is Essential for Pollen Callose Deposition and Its Cosuppression Results in a New Type of Thermosensitive Genic Male Sterility
      Rongzhi Chen, Xiao Zhao, Zhe Shao, Zhe Wei, Yuanyuan Wang, Lili Zhu, Jie Zhao, Mengxiang Sun, Ruifeng He, Guangcun He
      Plant Cell Mar 2007, 19 (3) 847-861; DOI: https://doi.org/10.1105/tpc.106.044123

      UDP-glucose pyrophosphorylase functions in carbohydrate metabolism and cell wall biosynthesis. Silencing of rice Ugp1 affects normal callose deposition during pollen mother cell (PMC) meiosis and leads to the degeneration of PMC at the early meiosis stage. This work demonstrates that rice Ugp1 is essential for PMC meiosis and microspore development.

  4. Zhao, Qian

    1. You have accessRestricted Access
      Arabidopsis MICROTUBULE-ASSOCIATED PROTEIN18 Functions in Directional Cell Growth by Destabilizing Cortical Microtubules
      Xia Wang, Lei Zhu, Baoquan Liu, Che Wang, Lifeng Jin, Qian Zhao, Ming Yuan
      Plant Cell Mar 2007, 19 (3) 877-889; DOI: https://doi.org/10.1105/tpc.106.048579

      Mutations in microtubule-associated proteins (MAPs) result in abnormal plant development and plant cell morphogenesis due to disruption of microtubule (MT) organization. This study identified Arabidopsis MAP18, which binds to microtubules and inhibits tubulin polymerization, destabilizes MTs, and plays an important role in the regulation of MT organization to determine directional plant cell growth.

  5. Zhao, Xiao

    1. Open Access
      Rice UDP-Glucose Pyrophosphorylase1 Is Essential for Pollen Callose Deposition and Its Cosuppression Results in a New Type of Thermosensitive Genic Male Sterility
      Rongzhi Chen, Xiao Zhao, Zhe Shao, Zhe Wei, Yuanyuan Wang, Lili Zhu, Jie Zhao, Mengxiang Sun, Ruifeng He, Guangcun He
      Plant Cell Mar 2007, 19 (3) 847-861; DOI: https://doi.org/10.1105/tpc.106.044123

      UDP-glucose pyrophosphorylase functions in carbohydrate metabolism and cell wall biosynthesis. Silencing of rice Ugp1 affects normal callose deposition during pollen mother cell (PMC) meiosis and leads to the degeneration of PMC at the early meiosis stage. This work demonstrates that rice Ugp1 is essential for PMC meiosis and microspore development.

  6. Zheng, Huanquan

    1. You have accessRestricted Access
      A Core Subunit of the RNA-Processing/Degrading Exosome Specifically Influences Cuticular Wax Biosynthesis in Arabidopsis
      Tanya S. Hooker, Patricia Lam, Huanquan Zheng, Ljerka Kunst
      Plant Cell Mar 2007, 19 (3) 904-913; DOI: https://doi.org/10.1105/tpc.106.049304

      The cuticle, an extracellular matrix of cutin polyester and waxes, covers and protects plant aerial organs, but little is known about the regulation of cuticular wax deposition. Mutant analysis and gene isolation and characterization demonstrate that wax production is controlled, at least in part, by the mRNA stability of a repressor that is recognized and degraded by the CER7 ribonuclease.

  7. Zhu, Lei

    1. You have accessRestricted Access
      Arabidopsis MICROTUBULE-ASSOCIATED PROTEIN18 Functions in Directional Cell Growth by Destabilizing Cortical Microtubules
      Xia Wang, Lei Zhu, Baoquan Liu, Che Wang, Lifeng Jin, Qian Zhao, Ming Yuan
      Plant Cell Mar 2007, 19 (3) 877-889; DOI: https://doi.org/10.1105/tpc.106.048579

      Mutations in microtubule-associated proteins (MAPs) result in abnormal plant development and plant cell morphogenesis due to disruption of microtubule (MT) organization. This study identified Arabidopsis MAP18, which binds to microtubules and inhibits tubulin polymerization, destabilizes MTs, and plays an important role in the regulation of MT organization to determine directional plant cell growth.

  8. Zhu, Lili

    1. Open Access
      Rice UDP-Glucose Pyrophosphorylase1 Is Essential for Pollen Callose Deposition and Its Cosuppression Results in a New Type of Thermosensitive Genic Male Sterility
      Rongzhi Chen, Xiao Zhao, Zhe Shao, Zhe Wei, Yuanyuan Wang, Lili Zhu, Jie Zhao, Mengxiang Sun, Ruifeng He, Guangcun He
      Plant Cell Mar 2007, 19 (3) 847-861; DOI: https://doi.org/10.1105/tpc.106.044123

      UDP-glucose pyrophosphorylase functions in carbohydrate metabolism and cell wall biosynthesis. Silencing of rice Ugp1 affects normal callose deposition during pollen mother cell (PMC) meiosis and leads to the degeneration of PMC at the early meiosis stage. This work demonstrates that rice Ugp1 is essential for PMC meiosis and microspore development.

  9. Zimmer, Sara L.

    1. Open Access
      Integration of Chloroplast Nucleic Acid Metabolism into the Phosphate Deprivation Response in Chlamydomonas reinhardtii
      Shlomit Yehudai-Resheff, Sara L. Zimmer, Yutaka Komine, David B. Stern
      Plant Cell Mar 2007, 19 (3) 1023-1038; DOI: https://doi.org/10.1105/tpc.106.045427

      The role of the chloroplast as a phosphorus (P) reservoir in acclimation to P limitation is not well known. Polynucleotide phosphorylase consumes P through RNA decay, and while P deprivation usually stimulates RNA decay, in Chlamydomonas chloroplasts RNA levels rise but DNA levels fall during acclimation, suggesting that chloroplast polyploidy may be adaptive as a repository for P.

Back to top
PreviousNext

In this issue

The Plant Cell Online: 19 (3)
The Plant Cell
Vol. 19, Issue 3
March 2007
  • Table of Contents
  • Table of Contents (PDF)
  • About the Cover
  • Index by author
  • Advertising (PDF)
  • Back Matter (PDF)
  • Front Matter (PDF)
Sign up for alerts

Our Content

  • Home
  • Current Issue
  • Plant Cell Preview
  • Archive
  • Teaching Tools in Plant Biology
  • Plant Physiology
  • Plant Direct
  • Plantae
  • ASPB

For Authors

  • Instructions
  • Submit a Manuscript
  • Editorial Board and Staff
  • Policies
  • Recognizing our Authors

For Reviewers

  • Instructions
  • Peer Review Reports
  • Journal Miles
  • Transfer of reviews to Plant Direct
  • Policies

Other Services

  • Permissions
  • Librarian resources
  • Advertise in our journals
  • Alerts
  • RSS Feeds
  • Contact Us

Copyright © 2021 by The American Society of Plant Biologists

Powered by HighWire