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Table of Contents

The Plant Cell Online: 20 (6)
Jun 2008
  • 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. Aki, Shiori

    1. Open Access
      Targeted Degradation of the Cyclin-Dependent Kinase Inhibitor ICK4/KRP6 by RING-Type E3 Ligases Is Essential for Mitotic Cell Cycle Progression during Arabidopsis Gametogenesis
      Jingjing Liu, Yiyue Zhang, Genji Qin, Tomohiko Tsuge, Norihiro Sakaguchi, Guo Luo, Kangtai Sun, Dongqiao Shi, Shiori Aki, Nuoyan Zheng, Takashi Aoyama, Atsuhiro Oka, Weicai Yang, Masaaki Umeda, Qi Xie, Hongya Gu, Li-Jia Qu
      Plant Cell Jun 2008, 20 (6) 1538-1554; DOI: https://doi.org/10.1105/tpc.108.059741

      This work uses genetic and biochemical assays to examine two RING-type E3 ligases that interact with and target a specific inhibitor of cyclin-dependent kinases, ICK4/KRP6, for proteasome-mediated degradation. This cell cycle inhibitor is expressed during gametophyte meiosis and must be degraded prior to the subsequent mitotic divisions that form the male and female gametophytes.

  2. Akman, Ozgur E.

    1. You have accessRestricted Access
      Peeking into Pit Fields: A Multiple Twinning Model of Secondary Plasmodesmata Formation in Tobacco
      Christine Faulkner, Ozgur E. Akman, Karen Bell, Chris Jeffree, Karl Oparka
      Plant Cell Jun 2008, 20 (6) 1504-1518; DOI: https://doi.org/10.1105/tpc.107.056903

      Pores called plasmodesmata that connect plant cells arise at cytokinesis and secondarily during wall extension. This work uses a range of imaging and computational approaches to show that secondary plasmodesmata arise in direct contact with existing plasmodesmata during radial wall extension.

  3. Andriopoulou, Athina H.

    1. You have accessRestricted Access
      Spermidine Exodus and Oxidation in the Apoplast Induced by Abiotic Stress Is Responsible for H2O2 Signatures That Direct Tolerance Responses in Tobacco
      Panagiotis N. Moschou, Konstantinos A. Paschalidis, Ioannis D. Delis, Athina H. Andriopoulou, George D. Lagiotis, Dimitrios I. Yakoumakis, Kalliopi A. Roubelakis-Angelakis
      Plant Cell Jun 2008, 20 (6) 1708-1724; DOI: https://doi.org/10.1105/tpc.108.059733

      Polyamines play a protective role against stress challenges in plants. This work shows that abiotic stress induces spermidine secretion into the apoplast, where it is oxidized by polyamine oxidase. Depending on its levels and those of intracellular polyamines, the generated H2O2 induces either tolerance events or programmed cell death.

  4. Aoyama, Takashi

    1. Open Access
      Targeted Degradation of the Cyclin-Dependent Kinase Inhibitor ICK4/KRP6 by RING-Type E3 Ligases Is Essential for Mitotic Cell Cycle Progression during Arabidopsis Gametogenesis
      Jingjing Liu, Yiyue Zhang, Genji Qin, Tomohiko Tsuge, Norihiro Sakaguchi, Guo Luo, Kangtai Sun, Dongqiao Shi, Shiori Aki, Nuoyan Zheng, Takashi Aoyama, Atsuhiro Oka, Weicai Yang, Masaaki Umeda, Qi Xie, Hongya Gu, Li-Jia Qu
      Plant Cell Jun 2008, 20 (6) 1538-1554; DOI: https://doi.org/10.1105/tpc.108.059741

      This work uses genetic and biochemical assays to examine two RING-type E3 ligases that interact with and target a specific inhibitor of cyclin-dependent kinases, ICK4/KRP6, for proteasome-mediated degradation. This cell cycle inhibitor is expressed during gametophyte meiosis and must be degraded prior to the subsequent mitotic divisions that form the male and female gametophytes.

  5. Arimura, Shin-ichi

    1. You have accessRestricted Access
      Arabidopsis ELONGATED MITOCHONDRIA1 Is Required for Localization of DYNAMIN-RELATED PROTEIN3A to Mitochondrial Fission Sites
      Shin-ichi Arimura, Masaru Fujimoto, Yoko Doniwa, Naoki Kadoya, Mikio Nakazono, Wataru Sakamoto, Nobuhiro Tsutsumi
      Plant Cell Jun 2008, 20 (6) 1555-1566; DOI: https://doi.org/10.1105/tpc.108.058578

      Mitochondrial fission is a fundamental but poorly understood process in plant cells. DYNAMIN-RELATED PROTEIN3A is a conserved eukaryotic mitochondrial fission factor found in Arabidopsis that forms a ring around and severs mitochondria. Here, we identify a novel plant-specific factor, ELONGATED MITOCHONDRIA1, that is required for the correct localization of DRP3A.

  6. Asami, Tadao

    1. You have accessRestricted Access
      Antagonistic Interaction between Systemic Acquired Resistance and the Abscisic Acid–Mediated Abiotic Stress Response in Arabidopsis
      Michiko Yasuda, Atsushi Ishikawa, Yusuke Jikumaru, Motoaki Seki, Taishi Umezawa, Tadao Asami, Akiko Maruyama-Nakashita, Toshiaki Kudo, Kazuo Shinozaki, Shigeo Yoshida, Hideo Nakashita
      Plant Cell Jun 2008, 20 (6) 1678-1692; DOI: https://doi.org/10.1105/tpc.107.054296

      Several types of self-protecting systems that involve hormone signaling allow plants to survive various types of external stresses. This work details antagonistic interactions between abscisic acid–mediated responses to environmental stresses and salicylic acid–mediated signaling in the induction of systemic acquired resistance to pathogens.

B

  1. Barthélémy, Julien

    1. You have accessRestricted Access
      High-Resolution Whole-Mount Imaging of Three-Dimensional Tissue Organization and Gene Expression Enables the Study of Phloem Development and Structure in Arabidopsis
      Elisabeth Truernit, Hélène Bauby, Bertrand Dubreucq, Olivier Grandjean, John Runions, Julien Barthélémy, Jean-Christophe Palauqui
      Plant Cell Jun 2008, 20 (6) 1494-1503; DOI: https://doi.org/10.1105/tpc.107.056069

      This work images phloem development using a remarkable improvement in plant tissue staining that, in combination with confocal microscopy, reveals three-dimensional cellular organization of plant tissue with a precision that formerly required tissue sectioning. Furthermore, coupled with staining for β-glucuronidase activity, this method shows gene expression with single-cell resolution.

  2. Bauby, Hélène

    1. You have accessRestricted Access
      High-Resolution Whole-Mount Imaging of Three-Dimensional Tissue Organization and Gene Expression Enables the Study of Phloem Development and Structure in Arabidopsis
      Elisabeth Truernit, Hélène Bauby, Bertrand Dubreucq, Olivier Grandjean, John Runions, Julien Barthélémy, Jean-Christophe Palauqui
      Plant Cell Jun 2008, 20 (6) 1494-1503; DOI: https://doi.org/10.1105/tpc.107.056069

      This work images phloem development using a remarkable improvement in plant tissue staining that, in combination with confocal microscopy, reveals three-dimensional cellular organization of plant tissue with a precision that formerly required tissue sectioning. Furthermore, coupled with staining for β-glucuronidase activity, this method shows gene expression with single-cell resolution.

  3. Bell, Karen

    1. You have accessRestricted Access
      Peeking into Pit Fields: A Multiple Twinning Model of Secondary Plasmodesmata Formation in Tobacco
      Christine Faulkner, Ozgur E. Akman, Karen Bell, Chris Jeffree, Karl Oparka
      Plant Cell Jun 2008, 20 (6) 1504-1518; DOI: https://doi.org/10.1105/tpc.107.056903

      Pores called plasmodesmata that connect plant cells arise at cytokinesis and secondarily during wall extension. This work uses a range of imaging and computational approaches to show that secondary plasmodesmata arise in direct contact with existing plasmodesmata during radial wall extension.

  4. Berthold, Peter

    1. You have accessRestricted Access
      Channelrhodopsin-1 Initiates Phototaxis and Photophobic Responses in Chlamydomonas by Immediate Light-Induced Depolarization
      Peter Berthold, Satoshi P. Tsunoda, Oliver P. Ernst, Wolfgang Mages, Dietrich Gradmann, Peter Hegemann
      Plant Cell Jun 2008, 20 (6) 1665-1677; DOI: https://doi.org/10.1105/tpc.108.057919

      This study reanalyzed channelrhodopsin-1 (CHR1)–based photocurrents in Chlamydomonas and demonstrated that, in addition to H+, ChR1 also conducts other cations. This conductance enables the alga to orient in the light even at alkaline pH.

  5. Bevan, Michael W.

    1. You have accessRestricted Access
      Arabidopsis Reactome: A Foundation Knowledgebase for Plant Systems Biology
      Nicolas Tsesmetzis, Matthew Couchman, Janet Higgins, Alison Smith, John H. Doonan, Georg J. Seifert, Esther E. Schmidt, Imre Vastrik, Ewan Birney, Guanming Wu, Peter D'Eustachio, Lincoln D. Stein, Richard J. Morris, Michael W. Bevan, Sean V. Walsh
      Plant Cell Jun 2008, 20 (6) 1426-1436; DOI: https://doi.org/10.1105/tpc.108.057976
  6. Bigler, Laurent

    1. You have accessRestricted Access
      The Modified Flavonol Glycosylation Profile in the Arabidopsis rol1 Mutants Results in Alterations in Plant Growth and Cell Shape Formation
      Christoph Ringli, Laurent Bigler, Benjamin M. Kuhn, Ruth-Maria Leiber, Anouck Diet, Diana Santelia, Beat Frey, Stephan Pollmann, Markus Klein
      Plant Cell Jun 2008, 20 (6) 1470-1481; DOI: https://doi.org/10.1105/tpc.107.053249

      Flavonoids have been shown to affect growth in a variety of plant species. This work demonstrates that changes in the Arabidopsis flavonol glycosylation profile can interfere with cell development, resulting in defects in cotyledon growth, pavement cell shape, stomatal development, and trichome formation.

  7. Bingham, Scott

    1. You have accessRestricted Access
      Arabidopsis PEROXIN11c-e, FISSION1b, and DYNAMIN-RELATED PROTEIN3A Cooperate in Cell Cycle–Associated Replication of Peroxisomes
      Matthew J. Lingard, Satinder K. Gidda, Scott Bingham, Steven J. Rothstein, Robert T. Mullen, Richard N. Trelease
      Plant Cell Jun 2008, 20 (6) 1567-1585; DOI: https://doi.org/10.1105/tpc.107.057679

      This study examines the molecular interactions of PEROXIN11 isoforms with each other, with FISSION1 isoforms, and with DYNAMIN-RELATED PROTEIN3A (DRP3A) in peroxisome replication during cell division. Gene silencing and protein interaction experiments show that these proteins play distinct but overlapping roles in the elongation and fission of replicating peroxisomes.

  8. Birney, Ewan

    1. You have accessRestricted Access
      Arabidopsis Reactome: A Foundation Knowledgebase for Plant Systems Biology
      Nicolas Tsesmetzis, Matthew Couchman, Janet Higgins, Alison Smith, John H. Doonan, Georg J. Seifert, Esther E. Schmidt, Imre Vastrik, Ewan Birney, Guanming Wu, Peter D'Eustachio, Lincoln D. Stein, Richard J. Morris, Michael W. Bevan, Sean V. Walsh
      Plant Cell Jun 2008, 20 (6) 1426-1436; DOI: https://doi.org/10.1105/tpc.108.057976
  9. Bosch, Dirk

    1. You have accessRestricted Access
      Identification of the Gene Encoding the α1,3-Mannosyltransferase (ALG3) in Arabidopsis and Characterization of Downstream N-Glycan Processing
      Maurice Henquet, Ludwig Lehle, Mariëlle Schreuder, Gerard Rouwendal, Jos Molthoff, Johannes Helsper, Sander van der Krol, Dirk Bosch
      Plant Cell Jun 2008, 20 (6) 1652-1664; DOI: https://doi.org/10.1105/tpc.108.060731

      This work describes the identification of a plant glycosyltransferase that is involved in the initial phase of N-glycan biosynthesis in the endoplasmic reticulum. A detailed analysis of a mutant of this glycosyltransferase provides insights into properties of downstream enzymes in the N-glycan biosynthesis pathway in plants.

  10. Brkljacic, Jelena

    1. You have accessRestricted Access
      Two Distinct Interacting Classes of Nuclear Envelope–Associated Coiled-Coil Proteins Are Required for the Tissue-Specific Nuclear Envelope Targeting of Arabidopsis RanGAP
      Qiao Zhao, Jelena Brkljacic, Iris Meier
      Plant Cell Jun 2008, 20 (6) 1639-1651; DOI: https://doi.org/10.1105/tpc.108.059220

      Tandem affinity purification and mass spectrometry were used to identify a family of novel coiled-coil proteins required for nuclear envelope association of RanGAP1 in Arabidopsis root tip cells. The findings suggest an unanticipated complexity of RanGAP nuclear envelope targeting in higher plant cells, involving at least two families of likely plant-specific nuclear pore–associated proteins.

  11. Burgert, Ingo

    1. Open Access
      Disrupting Two Arabidopsis thaliana Xylosyltransferase Genes Results in Plants Deficient in Xyloglucan, a Major Primary Cell Wall Component
      David M. Cavalier, Olivier Lerouxel, Lutz Neumetzler, Kazuchika Yamauchi, Antje Reinecke, Glenn Freshour, Olga A. Zabotina, Michael G. Hahn, Ingo Burgert, Markus Pauly, Natasha V. Raikhel, Kenneth Keegstra
      Plant Cell Jun 2008, 20 (6) 1519-1537; DOI: https://doi.org/10.1105/tpc.108.059873

      This study adopted a reverse genetics approach to provide evidence that two Arabidopsis xylosyltransferase genes are involved in xyloglucan biosynthesis in vivo. Disrupting both of these genes resulted in plants with a severe root hair phenotype that lacked detectable xyloglucan. These findings challenge conventional models of the plant primary cell wall.

C

  1. Castillon, Alicia

    1. You have accessRestricted Access
      Light-Induced Phosphorylation and Degradation of the Negative Regulator PHYTOCHROME-INTERACTING FACTOR1 from Arabidopsis Depend upon Its Direct Physical Interactions with Photoactivated Phytochromes
      Hui Shen, Ling Zhu, Alicia Castillon, Manoj Majee, Bruce Downie, Enamul Huq
      Plant Cell Jun 2008, 20 (6) 1586-1602; DOI: https://doi.org/10.1105/tpc.108.060020

      PHYTOCHROME INTERACTING FACTOR1 is rapidly phosphorylated, ubiquitinated, and degraded under red and far-red light. Overexpression of a light-stable truncated PIF1 showed a constitutive photomorphogenic phenotype in the dark, suggesting that light-induced proteolytic degradation of negative regulators (e.g. PIFs) might be sufficient to promote photomorphogenesis.

  2. Cavalier, David M.

    1. Open Access
      Disrupting Two Arabidopsis thaliana Xylosyltransferase Genes Results in Plants Deficient in Xyloglucan, a Major Primary Cell Wall Component
      David M. Cavalier, Olivier Lerouxel, Lutz Neumetzler, Kazuchika Yamauchi, Antje Reinecke, Glenn Freshour, Olga A. Zabotina, Michael G. Hahn, Ingo Burgert, Markus Pauly, Natasha V. Raikhel, Kenneth Keegstra
      Plant Cell Jun 2008, 20 (6) 1519-1537; DOI: https://doi.org/10.1105/tpc.108.059873

      This study adopted a reverse genetics approach to provide evidence that two Arabidopsis xylosyltransferase genes are involved in xyloglucan biosynthesis in vivo. Disrupting both of these genes resulted in plants with a severe root hair phenotype that lacked detectable xyloglucan. These findings challenge conventional models of the plant primary cell wall.

  3. Chen, Fangfang

    1. You have accessRestricted Access
      Arabidopsis DDB1-CUL4 ASSOCIATED FACTOR1 Forms a Nuclear E3 Ubiquitin Ligase with DDB1 and CUL4 That Is Involved in Multiple Plant Developmental Processes
      Yu Zhang, Suhua Feng, Fangfang Chen, Haodong Chen, Jia Wang, Chad McCall, Yue Xiong, Xing Wang Deng
      Plant Cell Jun 2008, 20 (6) 1437-1455; DOI: https://doi.org/10.1105/tpc.108.058891

      Protein ubiquitination is a key posttranslational modification in eukaryotes. This study reveals a nuclear CULLIN4-based E3 ubiquitin ligase complex in Arabidopsis that plays a role in numerous plant developmental processes.

  4. Chen, Haodong

    1. You have accessRestricted Access
      Arabidopsis DDB1-CUL4 ASSOCIATED FACTOR1 Forms a Nuclear E3 Ubiquitin Ligase with DDB1 and CUL4 That Is Involved in Multiple Plant Developmental Processes
      Yu Zhang, Suhua Feng, Fangfang Chen, Haodong Chen, Jia Wang, Chad McCall, Yue Xiong, Xing Wang Deng
      Plant Cell Jun 2008, 20 (6) 1437-1455; DOI: https://doi.org/10.1105/tpc.108.058891

      Protein ubiquitination is a key posttranslational modification in eukaryotes. This study reveals a nuclear CULLIN4-based E3 ubiquitin ligase complex in Arabidopsis that plays a role in numerous plant developmental processes.

  5. Chen, Songbiao

    1. You have accessRestricted Access
      SPIN1, a K Homology Domain Protein Negatively Regulated and Ubiquitinated by the E3 Ubiquitin Ligase SPL11, Is Involved in Flowering Time Control in Rice
      Miguel E. Vega-Sánchez, Lirong Zeng, Songbiao Chen, Hei Leung, Guo-Liang Wang
      Plant Cell Jun 2008, 20 (6) 1456-1469; DOI: https://doi.org/10.1105/tpc.108.058610

      Both RNA processing and ubiquitination play important roles in the regulation of flowering. This work implicates the E3 ligase SPOTTED LEAF11 and its substrate SPIN1, a nuclear RNA/DNA binding protein of the STAR family, in rice flowering time control. This study links ubiquitination and RNA/DNA metabolism in flowering time regulation in plants.

  6. Choi, Seungjin

    1. You have accessRestricted Access
      Arabidopsis Nuclear-Encoded Plastid Transit Peptides Contain Multiple Sequence Subgroups with Distinctive Chloroplast-Targeting Sequence Motifs
      Dong Wook Lee, Jong Kyoung Kim, Sumin Lee, Seungjin Choi, Sanguk Kim, Inhwan Hwang
      Plant Cell Jun 2008, 20 (6) 1603-1622; DOI: https://doi.org/10.1105/tpc.108.060541

      This work examines sequences critical for chloroplast protein import by alanine substitution mutagenesis of proteins with very different transit peptide sequences. This approach is complemented by bioinformatic grouping of peptides and motif identification within subgroups, producing a highly accurate algorithm to predict chloroplast localization.

  7. Couchman, Matthew

    1. You have accessRestricted Access
      Arabidopsis Reactome: A Foundation Knowledgebase for Plant Systems Biology
      Nicolas Tsesmetzis, Matthew Couchman, Janet Higgins, Alison Smith, John H. Doonan, Georg J. Seifert, Esther E. Schmidt, Imre Vastrik, Ewan Birney, Guanming Wu, Peter D'Eustachio, Lincoln D. Stein, Richard J. Morris, Michael W. Bevan, Sean V. Walsh
      Plant Cell Jun 2008, 20 (6) 1426-1436; DOI: https://doi.org/10.1105/tpc.108.057976

D

  1. D'Eustachio, Peter

    1. You have accessRestricted Access
      Arabidopsis Reactome: A Foundation Knowledgebase for Plant Systems Biology
      Nicolas Tsesmetzis, Matthew Couchman, Janet Higgins, Alison Smith, John H. Doonan, Georg J. Seifert, Esther E. Schmidt, Imre Vastrik, Ewan Birney, Guanming Wu, Peter D'Eustachio, Lincoln D. Stein, Richard J. Morris, Michael W. Bevan, Sean V. Walsh
      Plant Cell Jun 2008, 20 (6) 1426-1436; DOI: https://doi.org/10.1105/tpc.108.057976
  2. Delis, Ioannis D.

    1. You have accessRestricted Access
      Spermidine Exodus and Oxidation in the Apoplast Induced by Abiotic Stress Is Responsible for H2O2 Signatures That Direct Tolerance Responses in Tobacco
      Panagiotis N. Moschou, Konstantinos A. Paschalidis, Ioannis D. Delis, Athina H. Andriopoulou, George D. Lagiotis, Dimitrios I. Yakoumakis, Kalliopi A. Roubelakis-Angelakis
      Plant Cell Jun 2008, 20 (6) 1708-1724; DOI: https://doi.org/10.1105/tpc.108.059733

      Polyamines play a protective role against stress challenges in plants. This work shows that abiotic stress induces spermidine secretion into the apoplast, where it is oxidized by polyamine oxidase. Depending on its levels and those of intracellular polyamines, the generated H2O2 induces either tolerance events or programmed cell death.

  3. Deng, Xing Wang

    1. You have accessRestricted Access
      Arabidopsis DDB1-CUL4 ASSOCIATED FACTOR1 Forms a Nuclear E3 Ubiquitin Ligase with DDB1 and CUL4 That Is Involved in Multiple Plant Developmental Processes
      Yu Zhang, Suhua Feng, Fangfang Chen, Haodong Chen, Jia Wang, Chad McCall, Yue Xiong, Xing Wang Deng
      Plant Cell Jun 2008, 20 (6) 1437-1455; DOI: https://doi.org/10.1105/tpc.108.058891

      Protein ubiquitination is a key posttranslational modification in eukaryotes. This study reveals a nuclear CULLIN4-based E3 ubiquitin ligase complex in Arabidopsis that plays a role in numerous plant developmental processes.

  4. Diet, Anouck

    1. You have accessRestricted Access
      The Modified Flavonol Glycosylation Profile in the Arabidopsis rol1 Mutants Results in Alterations in Plant Growth and Cell Shape Formation
      Christoph Ringli, Laurent Bigler, Benjamin M. Kuhn, Ruth-Maria Leiber, Anouck Diet, Diana Santelia, Beat Frey, Stephan Pollmann, Markus Klein
      Plant Cell Jun 2008, 20 (6) 1470-1481; DOI: https://doi.org/10.1105/tpc.107.053249

      Flavonoids have been shown to affect growth in a variety of plant species. This work demonstrates that changes in the Arabidopsis flavonol glycosylation profile can interfere with cell development, resulting in defects in cotyledon growth, pavement cell shape, stomatal development, and trichome formation.

  5. Doniwa, Yoko

    1. You have accessRestricted Access
      Arabidopsis ELONGATED MITOCHONDRIA1 Is Required for Localization of DYNAMIN-RELATED PROTEIN3A to Mitochondrial Fission Sites
      Shin-ichi Arimura, Masaru Fujimoto, Yoko Doniwa, Naoki Kadoya, Mikio Nakazono, Wataru Sakamoto, Nobuhiro Tsutsumi
      Plant Cell Jun 2008, 20 (6) 1555-1566; DOI: https://doi.org/10.1105/tpc.108.058578

      Mitochondrial fission is a fundamental but poorly understood process in plant cells. DYNAMIN-RELATED PROTEIN3A is a conserved eukaryotic mitochondrial fission factor found in Arabidopsis that forms a ring around and severs mitochondria. Here, we identify a novel plant-specific factor, ELONGATED MITOCHONDRIA1, that is required for the correct localization of DRP3A.

  6. Doonan, John H.

    1. You have accessRestricted Access
      Arabidopsis Reactome: A Foundation Knowledgebase for Plant Systems Biology
      Nicolas Tsesmetzis, Matthew Couchman, Janet Higgins, Alison Smith, John H. Doonan, Georg J. Seifert, Esther E. Schmidt, Imre Vastrik, Ewan Birney, Guanming Wu, Peter D'Eustachio, Lincoln D. Stein, Richard J. Morris, Michael W. Bevan, Sean V. Walsh
      Plant Cell Jun 2008, 20 (6) 1426-1436; DOI: https://doi.org/10.1105/tpc.108.057976
  7. Downie, Bruce

    1. You have accessRestricted Access
      Light-Induced Phosphorylation and Degradation of the Negative Regulator PHYTOCHROME-INTERACTING FACTOR1 from Arabidopsis Depend upon Its Direct Physical Interactions with Photoactivated Phytochromes
      Hui Shen, Ling Zhu, Alicia Castillon, Manoj Majee, Bruce Downie, Enamul Huq
      Plant Cell Jun 2008, 20 (6) 1586-1602; DOI: https://doi.org/10.1105/tpc.108.060020

      PHYTOCHROME INTERACTING FACTOR1 is rapidly phosphorylated, ubiquitinated, and degraded under red and far-red light. Overexpression of a light-stable truncated PIF1 showed a constitutive photomorphogenic phenotype in the dark, suggesting that light-induced proteolytic degradation of negative regulators (e.g. PIFs) might be sufficient to promote photomorphogenesis.

  8. Dubreucq, Bertrand

    1. You have accessRestricted Access
      High-Resolution Whole-Mount Imaging of Three-Dimensional Tissue Organization and Gene Expression Enables the Study of Phloem Development and Structure in Arabidopsis
      Elisabeth Truernit, Hélène Bauby, Bertrand Dubreucq, Olivier Grandjean, John Runions, Julien Barthélémy, Jean-Christophe Palauqui
      Plant Cell Jun 2008, 20 (6) 1494-1503; DOI: https://doi.org/10.1105/tpc.107.056069

      This work images phloem development using a remarkable improvement in plant tissue staining that, in combination with confocal microscopy, reveals three-dimensional cellular organization of plant tissue with a precision that formerly required tissue sectioning. Furthermore, coupled with staining for β-glucuronidase activity, this method shows gene expression with single-cell resolution.

E

  1. Eckardt, Nancy A.

    1. You have accessRestricted Access
      Role of Xyloglucan in Primary Cell Walls
      Nancy A. Eckardt
      Plant Cell Jun 2008, 20 (6) 1421-1422; DOI: https://doi.org/10.1105/tpc.108.061382
    2. You have accessRestricted Access
      High-Resolution Three-Dimensional Imaging of Plant Tissues
      Nancy A. Eckardt
      Plant Cell Jun 2008, 20 (6) 1423; DOI: https://doi.org/10.1105/tpc.108.200610
  2. Ernst, Oliver P.

    1. You have accessRestricted Access
      Channelrhodopsin-1 Initiates Phototaxis and Photophobic Responses in Chlamydomonas by Immediate Light-Induced Depolarization
      Peter Berthold, Satoshi P. Tsunoda, Oliver P. Ernst, Wolfgang Mages, Dietrich Gradmann, Peter Hegemann
      Plant Cell Jun 2008, 20 (6) 1665-1677; DOI: https://doi.org/10.1105/tpc.108.057919

      This study reanalyzed channelrhodopsin-1 (CHR1)–based photocurrents in Chlamydomonas and demonstrated that, in addition to H+, ChR1 also conducts other cations. This conductance enables the alga to orient in the light even at alkaline pH.

F

  1. Faulkner, Christine

    1. You have accessRestricted Access
      Peeking into Pit Fields: A Multiple Twinning Model of Secondary Plasmodesmata Formation in Tobacco
      Christine Faulkner, Ozgur E. Akman, Karen Bell, Chris Jeffree, Karl Oparka
      Plant Cell Jun 2008, 20 (6) 1504-1518; DOI: https://doi.org/10.1105/tpc.107.056903

      Pores called plasmodesmata that connect plant cells arise at cytokinesis and secondarily during wall extension. This work uses a range of imaging and computational approaches to show that secondary plasmodesmata arise in direct contact with existing plasmodesmata during radial wall extension.

  2. Feng, Suhua

    1. You have accessRestricted Access
      Arabidopsis DDB1-CUL4 ASSOCIATED FACTOR1 Forms a Nuclear E3 Ubiquitin Ligase with DDB1 and CUL4 That Is Involved in Multiple Plant Developmental Processes
      Yu Zhang, Suhua Feng, Fangfang Chen, Haodong Chen, Jia Wang, Chad McCall, Yue Xiong, Xing Wang Deng
      Plant Cell Jun 2008, 20 (6) 1437-1455; DOI: https://doi.org/10.1105/tpc.108.058891

      Protein ubiquitination is a key posttranslational modification in eukaryotes. This study reveals a nuclear CULLIN4-based E3 ubiquitin ligase complex in Arabidopsis that plays a role in numerous plant developmental processes.

  3. Freshour, Glenn

    1. Open Access
      Disrupting Two Arabidopsis thaliana Xylosyltransferase Genes Results in Plants Deficient in Xyloglucan, a Major Primary Cell Wall Component
      David M. Cavalier, Olivier Lerouxel, Lutz Neumetzler, Kazuchika Yamauchi, Antje Reinecke, Glenn Freshour, Olga A. Zabotina, Michael G. Hahn, Ingo Burgert, Markus Pauly, Natasha V. Raikhel, Kenneth Keegstra
      Plant Cell Jun 2008, 20 (6) 1519-1537; DOI: https://doi.org/10.1105/tpc.108.059873

      This study adopted a reverse genetics approach to provide evidence that two Arabidopsis xylosyltransferase genes are involved in xyloglucan biosynthesis in vivo. Disrupting both of these genes resulted in plants with a severe root hair phenotype that lacked detectable xyloglucan. These findings challenge conventional models of the plant primary cell wall.

  4. Frey, Beat

    1. You have accessRestricted Access
      The Modified Flavonol Glycosylation Profile in the Arabidopsis rol1 Mutants Results in Alterations in Plant Growth and Cell Shape Formation
      Christoph Ringli, Laurent Bigler, Benjamin M. Kuhn, Ruth-Maria Leiber, Anouck Diet, Diana Santelia, Beat Frey, Stephan Pollmann, Markus Klein
      Plant Cell Jun 2008, 20 (6) 1470-1481; DOI: https://doi.org/10.1105/tpc.107.053249

      Flavonoids have been shown to affect growth in a variety of plant species. This work demonstrates that changes in the Arabidopsis flavonol glycosylation profile can interfere with cell development, resulting in defects in cotyledon growth, pavement cell shape, stomatal development, and trichome formation.

  5. Fujimoto, Masaru

    1. You have accessRestricted Access
      Arabidopsis ELONGATED MITOCHONDRIA1 Is Required for Localization of DYNAMIN-RELATED PROTEIN3A to Mitochondrial Fission Sites
      Shin-ichi Arimura, Masaru Fujimoto, Yoko Doniwa, Naoki Kadoya, Mikio Nakazono, Wataru Sakamoto, Nobuhiro Tsutsumi
      Plant Cell Jun 2008, 20 (6) 1555-1566; DOI: https://doi.org/10.1105/tpc.108.058578

      Mitochondrial fission is a fundamental but poorly understood process in plant cells. DYNAMIN-RELATED PROTEIN3A is a conserved eukaryotic mitochondrial fission factor found in Arabidopsis that forms a ring around and severs mitochondria. Here, we identify a novel plant-specific factor, ELONGATED MITOCHONDRIA1, that is required for the correct localization of DRP3A.

  6. Fujita, Miki

    1. You have accessRestricted Access
      Arabidopsis DREB2A-Interacting Proteins Function as RING E3 Ligases and Negatively Regulate Plant Drought Stress–Responsive Gene Expression
      Feng Qin, Yoh Sakuma, Lam-Son Phan Tran, Kyonoshin Maruyama, Satoshi Kidokoro, Yasunari Fujita, Miki Fujita, Taishi Umezawa, Yoriko Sawano, Ken-ichi Miyazono, Masaru Tanokura, Kazuo Shinozaki, Kazuko Yamaguchi-Shinozaki
      Plant Cell Jun 2008, 20 (6) 1693-1707; DOI: https://doi.org/10.1105/tpc.107.057380

      Drought-inducible gene expression is controlled by the key transcription factor DREB2A. We identified two C3HC4 RING domain–containing proteins that interact with DREB2A and function as E3 ubiquitin ligases to mediate DREB2A degradation to tightly control DREB2A protein abundance.

  7. Fujita, Yasunari

    1. You have accessRestricted Access
      Arabidopsis DREB2A-Interacting Proteins Function as RING E3 Ligases and Negatively Regulate Plant Drought Stress–Responsive Gene Expression
      Feng Qin, Yoh Sakuma, Lam-Son Phan Tran, Kyonoshin Maruyama, Satoshi Kidokoro, Yasunari Fujita, Miki Fujita, Taishi Umezawa, Yoriko Sawano, Ken-ichi Miyazono, Masaru Tanokura, Kazuo Shinozaki, Kazuko Yamaguchi-Shinozaki
      Plant Cell Jun 2008, 20 (6) 1693-1707; DOI: https://doi.org/10.1105/tpc.107.057380

      Drought-inducible gene expression is controlled by the key transcription factor DREB2A. We identified two C3HC4 RING domain–containing proteins that interact with DREB2A and function as E3 ubiquitin ligases to mediate DREB2A degradation to tightly control DREB2A protein abundance.

G

  1. Gidda, Satinder K.

    1. You have accessRestricted Access
      Arabidopsis PEROXIN11c-e, FISSION1b, and DYNAMIN-RELATED PROTEIN3A Cooperate in Cell Cycle–Associated Replication of Peroxisomes
      Matthew J. Lingard, Satinder K. Gidda, Scott Bingham, Steven J. Rothstein, Robert T. Mullen, Richard N. Trelease
      Plant Cell Jun 2008, 20 (6) 1567-1585; DOI: https://doi.org/10.1105/tpc.107.057679

      This study examines the molecular interactions of PEROXIN11 isoforms with each other, with FISSION1 isoforms, and with DYNAMIN-RELATED PROTEIN3A (DRP3A) in peroxisome replication during cell division. Gene silencing and protein interaction experiments show that these proteins play distinct but overlapping roles in the elongation and fission of replicating peroxisomes.

  2. Gradmann, Dietrich

    1. You have accessRestricted Access
      Channelrhodopsin-1 Initiates Phototaxis and Photophobic Responses in Chlamydomonas by Immediate Light-Induced Depolarization
      Peter Berthold, Satoshi P. Tsunoda, Oliver P. Ernst, Wolfgang Mages, Dietrich Gradmann, Peter Hegemann
      Plant Cell Jun 2008, 20 (6) 1665-1677; DOI: https://doi.org/10.1105/tpc.108.057919

      This study reanalyzed channelrhodopsin-1 (CHR1)–based photocurrents in Chlamydomonas and demonstrated that, in addition to H+, ChR1 also conducts other cations. This conductance enables the alga to orient in the light even at alkaline pH.

  3. Grandjean, Olivier

    1. You have accessRestricted Access
      High-Resolution Whole-Mount Imaging of Three-Dimensional Tissue Organization and Gene Expression Enables the Study of Phloem Development and Structure in Arabidopsis
      Elisabeth Truernit, Hélène Bauby, Bertrand Dubreucq, Olivier Grandjean, John Runions, Julien Barthélémy, Jean-Christophe Palauqui
      Plant Cell Jun 2008, 20 (6) 1494-1503; DOI: https://doi.org/10.1105/tpc.107.056069

      This work images phloem development using a remarkable improvement in plant tissue staining that, in combination with confocal microscopy, reveals three-dimensional cellular organization of plant tissue with a precision that formerly required tissue sectioning. Furthermore, coupled with staining for β-glucuronidase activity, this method shows gene expression with single-cell resolution.

  4. Gu, Hongya

    1. Open Access
      Targeted Degradation of the Cyclin-Dependent Kinase Inhibitor ICK4/KRP6 by RING-Type E3 Ligases Is Essential for Mitotic Cell Cycle Progression during Arabidopsis Gametogenesis
      Jingjing Liu, Yiyue Zhang, Genji Qin, Tomohiko Tsuge, Norihiro Sakaguchi, Guo Luo, Kangtai Sun, Dongqiao Shi, Shiori Aki, Nuoyan Zheng, Takashi Aoyama, Atsuhiro Oka, Weicai Yang, Masaaki Umeda, Qi Xie, Hongya Gu, Li-Jia Qu
      Plant Cell Jun 2008, 20 (6) 1538-1554; DOI: https://doi.org/10.1105/tpc.108.059741

      This work uses genetic and biochemical assays to examine two RING-type E3 ligases that interact with and target a specific inhibitor of cyclin-dependent kinases, ICK4/KRP6, for proteasome-mediated degradation. This cell cycle inhibitor is expressed during gametophyte meiosis and must be degraded prior to the subsequent mitotic divisions that form the male and female gametophytes.

H

  1. Hahn, Michael G.

    1. Open Access
      Disrupting Two Arabidopsis thaliana Xylosyltransferase Genes Results in Plants Deficient in Xyloglucan, a Major Primary Cell Wall Component
      David M. Cavalier, Olivier Lerouxel, Lutz Neumetzler, Kazuchika Yamauchi, Antje Reinecke, Glenn Freshour, Olga A. Zabotina, Michael G. Hahn, Ingo Burgert, Markus Pauly, Natasha V. Raikhel, Kenneth Keegstra
      Plant Cell Jun 2008, 20 (6) 1519-1537; DOI: https://doi.org/10.1105/tpc.108.059873

      This study adopted a reverse genetics approach to provide evidence that two Arabidopsis xylosyltransferase genes are involved in xyloglucan biosynthesis in vivo. Disrupting both of these genes resulted in plants with a severe root hair phenotype that lacked detectable xyloglucan. These findings challenge conventional models of the plant primary cell wall.

    2. Open Access
      Analysis of the Golgi Apparatus in Arabidopsis Seed Coat Cells during Polarized Secretion of Pectin-Rich Mucilage
      Robin E. Young, Heather E. McFarlane, Michael G. Hahn, Tamara L. Western, George W. Haughn, A. Lacey Samuels
      Plant Cell Jun 2008, 20 (6) 1623-1638; DOI: https://doi.org/10.1105/tpc.108.058842

      Golgi stacks in Arabidopsis seed coat cells produce mucilage synchronously at a specific stage of differentiation. The morphology of stacks was dependent on the volume of mucilage produced, but the number was not, suggesting that proliferation of stacks is developmentally programmed. Mucilage-producing Golgi stacks were randomly distributed in the cell and not clustered at the site of secretion.

  2. Han, Pei

    1. Open Access
      Mutation of Arabidopsis BARD1 Causes Meristem Defects by Failing to Confine WUSCHEL Expression to the Organizing Center
      Pei Han, Qing Li, Yu-Xian Zhu
      Plant Cell Jun 2008, 20 (6) 1482-1493; DOI: https://doi.org/10.1105/tpc.108.058867

      BARD1 represses the transcriptional activity of WUSCHEL, a gene essential for maintenance of stem cell fate in Arabidopsis. In a bard1-null mutant, severe shoot apical meristem defects are observed as a result of WUSCHEL expression outside of the meristem organizing center. BARD1 may inhibit a chromatin-remodeling process vital for WUS expression.

  3. Haughn, George W.

    1. Open Access
      Analysis of the Golgi Apparatus in Arabidopsis Seed Coat Cells during Polarized Secretion of Pectin-Rich Mucilage
      Robin E. Young, Heather E. McFarlane, Michael G. Hahn, Tamara L. Western, George W. Haughn, A. Lacey Samuels
      Plant Cell Jun 2008, 20 (6) 1623-1638; DOI: https://doi.org/10.1105/tpc.108.058842

      Golgi stacks in Arabidopsis seed coat cells produce mucilage synchronously at a specific stage of differentiation. The morphology of stacks was dependent on the volume of mucilage produced, but the number was not, suggesting that proliferation of stacks is developmentally programmed. Mucilage-producing Golgi stacks were randomly distributed in the cell and not clustered at the site of secretion.

  4. Hegemann, Peter

    1. You have accessRestricted Access
      Channelrhodopsin-1 Initiates Phototaxis and Photophobic Responses in Chlamydomonas by Immediate Light-Induced Depolarization
      Peter Berthold, Satoshi P. Tsunoda, Oliver P. Ernst, Wolfgang Mages, Dietrich Gradmann, Peter Hegemann
      Plant Cell Jun 2008, 20 (6) 1665-1677; DOI: https://doi.org/10.1105/tpc.108.057919

      This study reanalyzed channelrhodopsin-1 (CHR1)–based photocurrents in Chlamydomonas and demonstrated that, in addition to H+, ChR1 also conducts other cations. This conductance enables the alga to orient in the light even at alkaline pH.

  5. Helsper, Johannes

    1. You have accessRestricted Access
      Identification of the Gene Encoding the α1,3-Mannosyltransferase (ALG3) in Arabidopsis and Characterization of Downstream N-Glycan Processing
      Maurice Henquet, Ludwig Lehle, Mariëlle Schreuder, Gerard Rouwendal, Jos Molthoff, Johannes Helsper, Sander van der Krol, Dirk Bosch
      Plant Cell Jun 2008, 20 (6) 1652-1664; DOI: https://doi.org/10.1105/tpc.108.060731

      This work describes the identification of a plant glycosyltransferase that is involved in the initial phase of N-glycan biosynthesis in the endoplasmic reticulum. A detailed analysis of a mutant of this glycosyltransferase provides insights into properties of downstream enzymes in the N-glycan biosynthesis pathway in plants.

  6. Henquet, Maurice

    1. You have accessRestricted Access
      Identification of the Gene Encoding the α1,3-Mannosyltransferase (ALG3) in Arabidopsis and Characterization of Downstream N-Glycan Processing
      Maurice Henquet, Ludwig Lehle, Mariëlle Schreuder, Gerard Rouwendal, Jos Molthoff, Johannes Helsper, Sander van der Krol, Dirk Bosch
      Plant Cell Jun 2008, 20 (6) 1652-1664; DOI: https://doi.org/10.1105/tpc.108.060731

      This work describes the identification of a plant glycosyltransferase that is involved in the initial phase of N-glycan biosynthesis in the endoplasmic reticulum. A detailed analysis of a mutant of this glycosyltransferase provides insights into properties of downstream enzymes in the N-glycan biosynthesis pathway in plants.

  7. Higgins, Janet

    1. You have accessRestricted Access
      Arabidopsis Reactome: A Foundation Knowledgebase for Plant Systems Biology
      Nicolas Tsesmetzis, Matthew Couchman, Janet Higgins, Alison Smith, John H. Doonan, Georg J. Seifert, Esther E. Schmidt, Imre Vastrik, Ewan Birney, Guanming Wu, Peter D'Eustachio, Lincoln D. Stein, Richard J. Morris, Michael W. Bevan, Sean V. Walsh
      Plant Cell Jun 2008, 20 (6) 1426-1436; DOI: https://doi.org/10.1105/tpc.108.057976
  8. Hofmann, Nancy

    1. You have accessRestricted Access
      Abscisic Acid–Mediated Suppression of Systemic Acquired Resistance Signaling
      Nancy Hofmann
      Plant Cell Jun 2008, 20 (6) 1425; DOI: https://doi.org/10.1105/tpc.108.200612
  9. Huq, Enamul

    1. You have accessRestricted Access
      Light-Induced Phosphorylation and Degradation of the Negative Regulator PHYTOCHROME-INTERACTING FACTOR1 from Arabidopsis Depend upon Its Direct Physical Interactions with Photoactivated Phytochromes
      Hui Shen, Ling Zhu, Alicia Castillon, Manoj Majee, Bruce Downie, Enamul Huq
      Plant Cell Jun 2008, 20 (6) 1586-1602; DOI: https://doi.org/10.1105/tpc.108.060020

      PHYTOCHROME INTERACTING FACTOR1 is rapidly phosphorylated, ubiquitinated, and degraded under red and far-red light. Overexpression of a light-stable truncated PIF1 showed a constitutive photomorphogenic phenotype in the dark, suggesting that light-induced proteolytic degradation of negative regulators (e.g. PIFs) might be sufficient to promote photomorphogenesis.

  10. Hwang, Inhwan

    1. You have accessRestricted Access
      Arabidopsis Nuclear-Encoded Plastid Transit Peptides Contain Multiple Sequence Subgroups with Distinctive Chloroplast-Targeting Sequence Motifs
      Dong Wook Lee, Jong Kyoung Kim, Sumin Lee, Seungjin Choi, Sanguk Kim, Inhwan Hwang
      Plant Cell Jun 2008, 20 (6) 1603-1622; DOI: https://doi.org/10.1105/tpc.108.060541

      This work examines sequences critical for chloroplast protein import by alanine substitution mutagenesis of proteins with very different transit peptide sequences. This approach is complemented by bioinformatic grouping of peptides and motif identification within subgroups, producing a highly accurate algorithm to predict chloroplast localization.

I

  1. Ishikawa, Atsushi

    1. You have accessRestricted Access
      Antagonistic Interaction between Systemic Acquired Resistance and the Abscisic Acid–Mediated Abiotic Stress Response in Arabidopsis
      Michiko Yasuda, Atsushi Ishikawa, Yusuke Jikumaru, Motoaki Seki, Taishi Umezawa, Tadao Asami, Akiko Maruyama-Nakashita, Toshiaki Kudo, Kazuo Shinozaki, Shigeo Yoshida, Hideo Nakashita
      Plant Cell Jun 2008, 20 (6) 1678-1692; DOI: https://doi.org/10.1105/tpc.107.054296

      Several types of self-protecting systems that involve hormone signaling allow plants to survive various types of external stresses. This work details antagonistic interactions between abscisic acid–mediated responses to environmental stresses and salicylic acid–mediated signaling in the induction of systemic acquired resistance to pathogens.

J

  1. Jeffree, Chris

    1. You have accessRestricted Access
      Peeking into Pit Fields: A Multiple Twinning Model of Secondary Plasmodesmata Formation in Tobacco
      Christine Faulkner, Ozgur E. Akman, Karen Bell, Chris Jeffree, Karl Oparka
      Plant Cell Jun 2008, 20 (6) 1504-1518; DOI: https://doi.org/10.1105/tpc.107.056903

      Pores called plasmodesmata that connect plant cells arise at cytokinesis and secondarily during wall extension. This work uses a range of imaging and computational approaches to show that secondary plasmodesmata arise in direct contact with existing plasmodesmata during radial wall extension.

  2. Jikumaru, Yusuke

    1. You have accessRestricted Access
      Antagonistic Interaction between Systemic Acquired Resistance and the Abscisic Acid–Mediated Abiotic Stress Response in Arabidopsis
      Michiko Yasuda, Atsushi Ishikawa, Yusuke Jikumaru, Motoaki Seki, Taishi Umezawa, Tadao Asami, Akiko Maruyama-Nakashita, Toshiaki Kudo, Kazuo Shinozaki, Shigeo Yoshida, Hideo Nakashita
      Plant Cell Jun 2008, 20 (6) 1678-1692; DOI: https://doi.org/10.1105/tpc.107.054296

      Several types of self-protecting systems that involve hormone signaling allow plants to survive various types of external stresses. This work details antagonistic interactions between abscisic acid–mediated responses to environmental stresses and salicylic acid–mediated signaling in the induction of systemic acquired resistance to pathogens.

K

  1. Kadoya, Naoki

    1. You have accessRestricted Access
      Arabidopsis ELONGATED MITOCHONDRIA1 Is Required for Localization of DYNAMIN-RELATED PROTEIN3A to Mitochondrial Fission Sites
      Shin-ichi Arimura, Masaru Fujimoto, Yoko Doniwa, Naoki Kadoya, Mikio Nakazono, Wataru Sakamoto, Nobuhiro Tsutsumi
      Plant Cell Jun 2008, 20 (6) 1555-1566; DOI: https://doi.org/10.1105/tpc.108.058578

      Mitochondrial fission is a fundamental but poorly understood process in plant cells. DYNAMIN-RELATED PROTEIN3A is a conserved eukaryotic mitochondrial fission factor found in Arabidopsis that forms a ring around and severs mitochondria. Here, we identify a novel plant-specific factor, ELONGATED MITOCHONDRIA1, that is required for the correct localization of DRP3A.

  2. Keegstra, Kenneth

    1. Open Access
      Disrupting Two Arabidopsis thaliana Xylosyltransferase Genes Results in Plants Deficient in Xyloglucan, a Major Primary Cell Wall Component
      David M. Cavalier, Olivier Lerouxel, Lutz Neumetzler, Kazuchika Yamauchi, Antje Reinecke, Glenn Freshour, Olga A. Zabotina, Michael G. Hahn, Ingo Burgert, Markus Pauly, Natasha V. Raikhel, Kenneth Keegstra
      Plant Cell Jun 2008, 20 (6) 1519-1537; DOI: https://doi.org/10.1105/tpc.108.059873

      This study adopted a reverse genetics approach to provide evidence that two Arabidopsis xylosyltransferase genes are involved in xyloglucan biosynthesis in vivo. Disrupting both of these genes resulted in plants with a severe root hair phenotype that lacked detectable xyloglucan. These findings challenge conventional models of the plant primary cell wall.

  3. Kidokoro, Satoshi

    1. You have accessRestricted Access
      Arabidopsis DREB2A-Interacting Proteins Function as RING E3 Ligases and Negatively Regulate Plant Drought Stress–Responsive Gene Expression
      Feng Qin, Yoh Sakuma, Lam-Son Phan Tran, Kyonoshin Maruyama, Satoshi Kidokoro, Yasunari Fujita, Miki Fujita, Taishi Umezawa, Yoriko Sawano, Ken-ichi Miyazono, Masaru Tanokura, Kazuo Shinozaki, Kazuko Yamaguchi-Shinozaki
      Plant Cell Jun 2008, 20 (6) 1693-1707; DOI: https://doi.org/10.1105/tpc.107.057380

      Drought-inducible gene expression is controlled by the key transcription factor DREB2A. We identified two C3HC4 RING domain–containing proteins that interact with DREB2A and function as E3 ubiquitin ligases to mediate DREB2A degradation to tightly control DREB2A protein abundance.

  4. Kim, Jong Kyoung

    1. You have accessRestricted Access
      Arabidopsis Nuclear-Encoded Plastid Transit Peptides Contain Multiple Sequence Subgroups with Distinctive Chloroplast-Targeting Sequence Motifs
      Dong Wook Lee, Jong Kyoung Kim, Sumin Lee, Seungjin Choi, Sanguk Kim, Inhwan Hwang
      Plant Cell Jun 2008, 20 (6) 1603-1622; DOI: https://doi.org/10.1105/tpc.108.060541

      This work examines sequences critical for chloroplast protein import by alanine substitution mutagenesis of proteins with very different transit peptide sequences. This approach is complemented by bioinformatic grouping of peptides and motif identification within subgroups, producing a highly accurate algorithm to predict chloroplast localization.

  5. Kim, Sanguk

    1. You have accessRestricted Access
      Arabidopsis Nuclear-Encoded Plastid Transit Peptides Contain Multiple Sequence Subgroups with Distinctive Chloroplast-Targeting Sequence Motifs
      Dong Wook Lee, Jong Kyoung Kim, Sumin Lee, Seungjin Choi, Sanguk Kim, Inhwan Hwang
      Plant Cell Jun 2008, 20 (6) 1603-1622; DOI: https://doi.org/10.1105/tpc.108.060541

      This work examines sequences critical for chloroplast protein import by alanine substitution mutagenesis of proteins with very different transit peptide sequences. This approach is complemented by bioinformatic grouping of peptides and motif identification within subgroups, producing a highly accurate algorithm to predict chloroplast localization.

  6. Klein, Markus

    1. You have accessRestricted Access
      The Modified Flavonol Glycosylation Profile in the Arabidopsis rol1 Mutants Results in Alterations in Plant Growth and Cell Shape Formation
      Christoph Ringli, Laurent Bigler, Benjamin M. Kuhn, Ruth-Maria Leiber, Anouck Diet, Diana Santelia, Beat Frey, Stephan Pollmann, Markus Klein
      Plant Cell Jun 2008, 20 (6) 1470-1481; DOI: https://doi.org/10.1105/tpc.107.053249

      Flavonoids have been shown to affect growth in a variety of plant species. This work demonstrates that changes in the Arabidopsis flavonol glycosylation profile can interfere with cell development, resulting in defects in cotyledon growth, pavement cell shape, stomatal development, and trichome formation.

  7. Kudo, Toshiaki

    1. You have accessRestricted Access
      Antagonistic Interaction between Systemic Acquired Resistance and the Abscisic Acid–Mediated Abiotic Stress Response in Arabidopsis
      Michiko Yasuda, Atsushi Ishikawa, Yusuke Jikumaru, Motoaki Seki, Taishi Umezawa, Tadao Asami, Akiko Maruyama-Nakashita, Toshiaki Kudo, Kazuo Shinozaki, Shigeo Yoshida, Hideo Nakashita
      Plant Cell Jun 2008, 20 (6) 1678-1692; DOI: https://doi.org/10.1105/tpc.107.054296

      Several types of self-protecting systems that involve hormone signaling allow plants to survive various types of external stresses. This work details antagonistic interactions between abscisic acid–mediated responses to environmental stresses and salicylic acid–mediated signaling in the induction of systemic acquired resistance to pathogens.

  8. Kuhn, Benjamin M.

    1. You have accessRestricted Access
      The Modified Flavonol Glycosylation Profile in the Arabidopsis rol1 Mutants Results in Alterations in Plant Growth and Cell Shape Formation
      Christoph Ringli, Laurent Bigler, Benjamin M. Kuhn, Ruth-Maria Leiber, Anouck Diet, Diana Santelia, Beat Frey, Stephan Pollmann, Markus Klein
      Plant Cell Jun 2008, 20 (6) 1470-1481; DOI: https://doi.org/10.1105/tpc.107.053249

      Flavonoids have been shown to affect growth in a variety of plant species. This work demonstrates that changes in the Arabidopsis flavonol glycosylation profile can interfere with cell development, resulting in defects in cotyledon growth, pavement cell shape, stomatal development, and trichome formation.

L

  1. Lagiotis, George D.

    1. You have accessRestricted Access
      Spermidine Exodus and Oxidation in the Apoplast Induced by Abiotic Stress Is Responsible for H2O2 Signatures That Direct Tolerance Responses in Tobacco
      Panagiotis N. Moschou, Konstantinos A. Paschalidis, Ioannis D. Delis, Athina H. Andriopoulou, George D. Lagiotis, Dimitrios I. Yakoumakis, Kalliopi A. Roubelakis-Angelakis
      Plant Cell Jun 2008, 20 (6) 1708-1724; DOI: https://doi.org/10.1105/tpc.108.059733

      Polyamines play a protective role against stress challenges in plants. This work shows that abiotic stress induces spermidine secretion into the apoplast, where it is oxidized by polyamine oxidase. Depending on its levels and those of intracellular polyamines, the generated H2O2 induces either tolerance events or programmed cell death.

  2. Lee, Dong Wook

    1. You have accessRestricted Access
      Arabidopsis Nuclear-Encoded Plastid Transit Peptides Contain Multiple Sequence Subgroups with Distinctive Chloroplast-Targeting Sequence Motifs
      Dong Wook Lee, Jong Kyoung Kim, Sumin Lee, Seungjin Choi, Sanguk Kim, Inhwan Hwang
      Plant Cell Jun 2008, 20 (6) 1603-1622; DOI: https://doi.org/10.1105/tpc.108.060541

      This work examines sequences critical for chloroplast protein import by alanine substitution mutagenesis of proteins with very different transit peptide sequences. This approach is complemented by bioinformatic grouping of peptides and motif identification within subgroups, producing a highly accurate algorithm to predict chloroplast localization.

  3. Lee, Sumin

    1. You have accessRestricted Access
      Arabidopsis Nuclear-Encoded Plastid Transit Peptides Contain Multiple Sequence Subgroups with Distinctive Chloroplast-Targeting Sequence Motifs
      Dong Wook Lee, Jong Kyoung Kim, Sumin Lee, Seungjin Choi, Sanguk Kim, Inhwan Hwang
      Plant Cell Jun 2008, 20 (6) 1603-1622; DOI: https://doi.org/10.1105/tpc.108.060541

      This work examines sequences critical for chloroplast protein import by alanine substitution mutagenesis of proteins with very different transit peptide sequences. This approach is complemented by bioinformatic grouping of peptides and motif identification within subgroups, producing a highly accurate algorithm to predict chloroplast localization.

  4. Lehle, Ludwig

    1. You have accessRestricted Access
      Identification of the Gene Encoding the α1,3-Mannosyltransferase (ALG3) in Arabidopsis and Characterization of Downstream N-Glycan Processing
      Maurice Henquet, Ludwig Lehle, Mariëlle Schreuder, Gerard Rouwendal, Jos Molthoff, Johannes Helsper, Sander van der Krol, Dirk Bosch
      Plant Cell Jun 2008, 20 (6) 1652-1664; DOI: https://doi.org/10.1105/tpc.108.060731

      This work describes the identification of a plant glycosyltransferase that is involved in the initial phase of N-glycan biosynthesis in the endoplasmic reticulum. A detailed analysis of a mutant of this glycosyltransferase provides insights into properties of downstream enzymes in the N-glycan biosynthesis pathway in plants.

  5. Leiber, Ruth-Maria

    1. You have accessRestricted Access
      The Modified Flavonol Glycosylation Profile in the Arabidopsis rol1 Mutants Results in Alterations in Plant Growth and Cell Shape Formation
      Christoph Ringli, Laurent Bigler, Benjamin M. Kuhn, Ruth-Maria Leiber, Anouck Diet, Diana Santelia, Beat Frey, Stephan Pollmann, Markus Klein
      Plant Cell Jun 2008, 20 (6) 1470-1481; DOI: https://doi.org/10.1105/tpc.107.053249

      Flavonoids have been shown to affect growth in a variety of plant species. This work demonstrates that changes in the Arabidopsis flavonol glycosylation profile can interfere with cell development, resulting in defects in cotyledon growth, pavement cell shape, stomatal development, and trichome formation.

  6. Lerouxel, Olivier

    1. Open Access
      Disrupting Two Arabidopsis thaliana Xylosyltransferase Genes Results in Plants Deficient in Xyloglucan, a Major Primary Cell Wall Component
      David M. Cavalier, Olivier Lerouxel, Lutz Neumetzler, Kazuchika Yamauchi, Antje Reinecke, Glenn Freshour, Olga A. Zabotina, Michael G. Hahn, Ingo Burgert, Markus Pauly, Natasha V. Raikhel, Kenneth Keegstra
      Plant Cell Jun 2008, 20 (6) 1519-1537; DOI: https://doi.org/10.1105/tpc.108.059873

      This study adopted a reverse genetics approach to provide evidence that two Arabidopsis xylosyltransferase genes are involved in xyloglucan biosynthesis in vivo. Disrupting both of these genes resulted in plants with a severe root hair phenotype that lacked detectable xyloglucan. These findings challenge conventional models of the plant primary cell wall.

  7. Leung, Hei

    1. You have accessRestricted Access
      SPIN1, a K Homology Domain Protein Negatively Regulated and Ubiquitinated by the E3 Ubiquitin Ligase SPL11, Is Involved in Flowering Time Control in Rice
      Miguel E. Vega-Sánchez, Lirong Zeng, Songbiao Chen, Hei Leung, Guo-Liang Wang
      Plant Cell Jun 2008, 20 (6) 1456-1469; DOI: https://doi.org/10.1105/tpc.108.058610

      Both RNA processing and ubiquitination play important roles in the regulation of flowering. This work implicates the E3 ligase SPOTTED LEAF11 and its substrate SPIN1, a nuclear RNA/DNA binding protein of the STAR family, in rice flowering time control. This study links ubiquitination and RNA/DNA metabolism in flowering time regulation in plants.

  8. Li, Qing

    1. Open Access
      Mutation of Arabidopsis BARD1 Causes Meristem Defects by Failing to Confine WUSCHEL Expression to the Organizing Center
      Pei Han, Qing Li, Yu-Xian Zhu
      Plant Cell Jun 2008, 20 (6) 1482-1493; DOI: https://doi.org/10.1105/tpc.108.058867

      BARD1 represses the transcriptional activity of WUSCHEL, a gene essential for maintenance of stem cell fate in Arabidopsis. In a bard1-null mutant, severe shoot apical meristem defects are observed as a result of WUSCHEL expression outside of the meristem organizing center. BARD1 may inhibit a chromatin-remodeling process vital for WUS expression.

  9. Lingard, Matthew J.

    1. You have accessRestricted Access
      Arabidopsis PEROXIN11c-e, FISSION1b, and DYNAMIN-RELATED PROTEIN3A Cooperate in Cell Cycle–Associated Replication of Peroxisomes
      Matthew J. Lingard, Satinder K. Gidda, Scott Bingham, Steven J. Rothstein, Robert T. Mullen, Richard N. Trelease
      Plant Cell Jun 2008, 20 (6) 1567-1585; DOI: https://doi.org/10.1105/tpc.107.057679

      This study examines the molecular interactions of PEROXIN11 isoforms with each other, with FISSION1 isoforms, and with DYNAMIN-RELATED PROTEIN3A (DRP3A) in peroxisome replication during cell division. Gene silencing and protein interaction experiments show that these proteins play distinct but overlapping roles in the elongation and fission of replicating peroxisomes.

  10. Liu, Jingjing

    1. Open Access
      Targeted Degradation of the Cyclin-Dependent Kinase Inhibitor ICK4/KRP6 by RING-Type E3 Ligases Is Essential for Mitotic Cell Cycle Progression during Arabidopsis Gametogenesis
      Jingjing Liu, Yiyue Zhang, Genji Qin, Tomohiko Tsuge, Norihiro Sakaguchi, Guo Luo, Kangtai Sun, Dongqiao Shi, Shiori Aki, Nuoyan Zheng, Takashi Aoyama, Atsuhiro Oka, Weicai Yang, Masaaki Umeda, Qi Xie, Hongya Gu, Li-Jia Qu
      Plant Cell Jun 2008, 20 (6) 1538-1554; DOI: https://doi.org/10.1105/tpc.108.059741

      This work uses genetic and biochemical assays to examine two RING-type E3 ligases that interact with and target a specific inhibitor of cyclin-dependent kinases, ICK4/KRP6, for proteasome-mediated degradation. This cell cycle inhibitor is expressed during gametophyte meiosis and must be degraded prior to the subsequent mitotic divisions that form the male and female gametophytes.

  11. Luo, Guo

    1. Open Access
      Targeted Degradation of the Cyclin-Dependent Kinase Inhibitor ICK4/KRP6 by RING-Type E3 Ligases Is Essential for Mitotic Cell Cycle Progression during Arabidopsis Gametogenesis
      Jingjing Liu, Yiyue Zhang, Genji Qin, Tomohiko Tsuge, Norihiro Sakaguchi, Guo Luo, Kangtai Sun, Dongqiao Shi, Shiori Aki, Nuoyan Zheng, Takashi Aoyama, Atsuhiro Oka, Weicai Yang, Masaaki Umeda, Qi Xie, Hongya Gu, Li-Jia Qu
      Plant Cell Jun 2008, 20 (6) 1538-1554; DOI: https://doi.org/10.1105/tpc.108.059741

      This work uses genetic and biochemical assays to examine two RING-type E3 ligases that interact with and target a specific inhibitor of cyclin-dependent kinases, ICK4/KRP6, for proteasome-mediated degradation. This cell cycle inhibitor is expressed during gametophyte meiosis and must be degraded prior to the subsequent mitotic divisions that form the male and female gametophytes.

M

  1. Mach, Jennifer

    1. You have accessRestricted Access
      Ubiquitin Ligation RINGs Twice: Redundant Control of Plant Processes by E3 Ubiquitin Ligases
      Jennifer Mach
      Plant Cell Jun 2008, 20 (6) 1424; DOI: https://doi.org/10.1105/tpc.108.200611
  2. Mages, Wolfgang

    1. You have accessRestricted Access
      Channelrhodopsin-1 Initiates Phototaxis and Photophobic Responses in Chlamydomonas by Immediate Light-Induced Depolarization
      Peter Berthold, Satoshi P. Tsunoda, Oliver P. Ernst, Wolfgang Mages, Dietrich Gradmann, Peter Hegemann
      Plant Cell Jun 2008, 20 (6) 1665-1677; DOI: https://doi.org/10.1105/tpc.108.057919

      This study reanalyzed channelrhodopsin-1 (CHR1)–based photocurrents in Chlamydomonas and demonstrated that, in addition to H+, ChR1 also conducts other cations. This conductance enables the alga to orient in the light even at alkaline pH.

  3. Majee, Manoj

    1. You have accessRestricted Access
      Light-Induced Phosphorylation and Degradation of the Negative Regulator PHYTOCHROME-INTERACTING FACTOR1 from Arabidopsis Depend upon Its Direct Physical Interactions with Photoactivated Phytochromes
      Hui Shen, Ling Zhu, Alicia Castillon, Manoj Majee, Bruce Downie, Enamul Huq
      Plant Cell Jun 2008, 20 (6) 1586-1602; DOI: https://doi.org/10.1105/tpc.108.060020

      PHYTOCHROME INTERACTING FACTOR1 is rapidly phosphorylated, ubiquitinated, and degraded under red and far-red light. Overexpression of a light-stable truncated PIF1 showed a constitutive photomorphogenic phenotype in the dark, suggesting that light-induced proteolytic degradation of negative regulators (e.g. PIFs) might be sufficient to promote photomorphogenesis.

  4. Maruyama, Kyonoshin

    1. You have accessRestricted Access
      Arabidopsis DREB2A-Interacting Proteins Function as RING E3 Ligases and Negatively Regulate Plant Drought Stress–Responsive Gene Expression
      Feng Qin, Yoh Sakuma, Lam-Son Phan Tran, Kyonoshin Maruyama, Satoshi Kidokoro, Yasunari Fujita, Miki Fujita, Taishi Umezawa, Yoriko Sawano, Ken-ichi Miyazono, Masaru Tanokura, Kazuo Shinozaki, Kazuko Yamaguchi-Shinozaki
      Plant Cell Jun 2008, 20 (6) 1693-1707; DOI: https://doi.org/10.1105/tpc.107.057380

      Drought-inducible gene expression is controlled by the key transcription factor DREB2A. We identified two C3HC4 RING domain–containing proteins that interact with DREB2A and function as E3 ubiquitin ligases to mediate DREB2A degradation to tightly control DREB2A protein abundance.

  5. Maruyama-Nakashita, Akiko

    1. You have accessRestricted Access
      Antagonistic Interaction between Systemic Acquired Resistance and the Abscisic Acid–Mediated Abiotic Stress Response in Arabidopsis
      Michiko Yasuda, Atsushi Ishikawa, Yusuke Jikumaru, Motoaki Seki, Taishi Umezawa, Tadao Asami, Akiko Maruyama-Nakashita, Toshiaki Kudo, Kazuo Shinozaki, Shigeo Yoshida, Hideo Nakashita
      Plant Cell Jun 2008, 20 (6) 1678-1692; DOI: https://doi.org/10.1105/tpc.107.054296

      Several types of self-protecting systems that involve hormone signaling allow plants to survive various types of external stresses. This work details antagonistic interactions between abscisic acid–mediated responses to environmental stresses and salicylic acid–mediated signaling in the induction of systemic acquired resistance to pathogens.

  6. McCall, Chad

    1. You have accessRestricted Access
      Arabidopsis DDB1-CUL4 ASSOCIATED FACTOR1 Forms a Nuclear E3 Ubiquitin Ligase with DDB1 and CUL4 That Is Involved in Multiple Plant Developmental Processes
      Yu Zhang, Suhua Feng, Fangfang Chen, Haodong Chen, Jia Wang, Chad McCall, Yue Xiong, Xing Wang Deng
      Plant Cell Jun 2008, 20 (6) 1437-1455; DOI: https://doi.org/10.1105/tpc.108.058891

      Protein ubiquitination is a key posttranslational modification in eukaryotes. This study reveals a nuclear CULLIN4-based E3 ubiquitin ligase complex in Arabidopsis that plays a role in numerous plant developmental processes.

  7. McFarlane, Heather E.

    1. Open Access
      Analysis of the Golgi Apparatus in Arabidopsis Seed Coat Cells during Polarized Secretion of Pectin-Rich Mucilage
      Robin E. Young, Heather E. McFarlane, Michael G. Hahn, Tamara L. Western, George W. Haughn, A. Lacey Samuels
      Plant Cell Jun 2008, 20 (6) 1623-1638; DOI: https://doi.org/10.1105/tpc.108.058842

      Golgi stacks in Arabidopsis seed coat cells produce mucilage synchronously at a specific stage of differentiation. The morphology of stacks was dependent on the volume of mucilage produced, but the number was not, suggesting that proliferation of stacks is developmentally programmed. Mucilage-producing Golgi stacks were randomly distributed in the cell and not clustered at the site of secretion.

  8. Meier, Iris

    1. You have accessRestricted Access
      Two Distinct Interacting Classes of Nuclear Envelope–Associated Coiled-Coil Proteins Are Required for the Tissue-Specific Nuclear Envelope Targeting of Arabidopsis RanGAP
      Qiao Zhao, Jelena Brkljacic, Iris Meier
      Plant Cell Jun 2008, 20 (6) 1639-1651; DOI: https://doi.org/10.1105/tpc.108.059220

      Tandem affinity purification and mass spectrometry were used to identify a family of novel coiled-coil proteins required for nuclear envelope association of RanGAP1 in Arabidopsis root tip cells. The findings suggest an unanticipated complexity of RanGAP nuclear envelope targeting in higher plant cells, involving at least two families of likely plant-specific nuclear pore–associated proteins.

  9. Miyazono, Ken-ichi

    1. You have accessRestricted Access
      Arabidopsis DREB2A-Interacting Proteins Function as RING E3 Ligases and Negatively Regulate Plant Drought Stress–Responsive Gene Expression
      Feng Qin, Yoh Sakuma, Lam-Son Phan Tran, Kyonoshin Maruyama, Satoshi Kidokoro, Yasunari Fujita, Miki Fujita, Taishi Umezawa, Yoriko Sawano, Ken-ichi Miyazono, Masaru Tanokura, Kazuo Shinozaki, Kazuko Yamaguchi-Shinozaki
      Plant Cell Jun 2008, 20 (6) 1693-1707; DOI: https://doi.org/10.1105/tpc.107.057380

      Drought-inducible gene expression is controlled by the key transcription factor DREB2A. We identified two C3HC4 RING domain–containing proteins that interact with DREB2A and function as E3 ubiquitin ligases to mediate DREB2A degradation to tightly control DREB2A protein abundance.

  10. Molthoff, Jos

    1. You have accessRestricted Access
      Identification of the Gene Encoding the α1,3-Mannosyltransferase (ALG3) in Arabidopsis and Characterization of Downstream N-Glycan Processing
      Maurice Henquet, Ludwig Lehle, Mariëlle Schreuder, Gerard Rouwendal, Jos Molthoff, Johannes Helsper, Sander van der Krol, Dirk Bosch
      Plant Cell Jun 2008, 20 (6) 1652-1664; DOI: https://doi.org/10.1105/tpc.108.060731

      This work describes the identification of a plant glycosyltransferase that is involved in the initial phase of N-glycan biosynthesis in the endoplasmic reticulum. A detailed analysis of a mutant of this glycosyltransferase provides insights into properties of downstream enzymes in the N-glycan biosynthesis pathway in plants.

  11. Morris, Richard J.

    1. You have accessRestricted Access
      Arabidopsis Reactome: A Foundation Knowledgebase for Plant Systems Biology
      Nicolas Tsesmetzis, Matthew Couchman, Janet Higgins, Alison Smith, John H. Doonan, Georg J. Seifert, Esther E. Schmidt, Imre Vastrik, Ewan Birney, Guanming Wu, Peter D'Eustachio, Lincoln D. Stein, Richard J. Morris, Michael W. Bevan, Sean V. Walsh
      Plant Cell Jun 2008, 20 (6) 1426-1436; DOI: https://doi.org/10.1105/tpc.108.057976
  12. Moschou, Panagiotis N.

    1. You have accessRestricted Access
      Spermidine Exodus and Oxidation in the Apoplast Induced by Abiotic Stress Is Responsible for H2O2 Signatures That Direct Tolerance Responses in Tobacco
      Panagiotis N. Moschou, Konstantinos A. Paschalidis, Ioannis D. Delis, Athina H. Andriopoulou, George D. Lagiotis, Dimitrios I. Yakoumakis, Kalliopi A. Roubelakis-Angelakis
      Plant Cell Jun 2008, 20 (6) 1708-1724; DOI: https://doi.org/10.1105/tpc.108.059733

      Polyamines play a protective role against stress challenges in plants. This work shows that abiotic stress induces spermidine secretion into the apoplast, where it is oxidized by polyamine oxidase. Depending on its levels and those of intracellular polyamines, the generated H2O2 induces either tolerance events or programmed cell death.

  13. Mullen, Robert T.

    1. You have accessRestricted Access
      Arabidopsis PEROXIN11c-e, FISSION1b, and DYNAMIN-RELATED PROTEIN3A Cooperate in Cell Cycle–Associated Replication of Peroxisomes
      Matthew J. Lingard, Satinder K. Gidda, Scott Bingham, Steven J. Rothstein, Robert T. Mullen, Richard N. Trelease
      Plant Cell Jun 2008, 20 (6) 1567-1585; DOI: https://doi.org/10.1105/tpc.107.057679

      This study examines the molecular interactions of PEROXIN11 isoforms with each other, with FISSION1 isoforms, and with DYNAMIN-RELATED PROTEIN3A (DRP3A) in peroxisome replication during cell division. Gene silencing and protein interaction experiments show that these proteins play distinct but overlapping roles in the elongation and fission of replicating peroxisomes.

N

  1. Nakashita, Hideo

    1. You have accessRestricted Access
      Antagonistic Interaction between Systemic Acquired Resistance and the Abscisic Acid–Mediated Abiotic Stress Response in Arabidopsis
      Michiko Yasuda, Atsushi Ishikawa, Yusuke Jikumaru, Motoaki Seki, Taishi Umezawa, Tadao Asami, Akiko Maruyama-Nakashita, Toshiaki Kudo, Kazuo Shinozaki, Shigeo Yoshida, Hideo Nakashita
      Plant Cell Jun 2008, 20 (6) 1678-1692; DOI: https://doi.org/10.1105/tpc.107.054296

      Several types of self-protecting systems that involve hormone signaling allow plants to survive various types of external stresses. This work details antagonistic interactions between abscisic acid–mediated responses to environmental stresses and salicylic acid–mediated signaling in the induction of systemic acquired resistance to pathogens.

  2. Nakazono, Mikio

    1. You have accessRestricted Access
      Arabidopsis ELONGATED MITOCHONDRIA1 Is Required for Localization of DYNAMIN-RELATED PROTEIN3A to Mitochondrial Fission Sites
      Shin-ichi Arimura, Masaru Fujimoto, Yoko Doniwa, Naoki Kadoya, Mikio Nakazono, Wataru Sakamoto, Nobuhiro Tsutsumi
      Plant Cell Jun 2008, 20 (6) 1555-1566; DOI: https://doi.org/10.1105/tpc.108.058578

      Mitochondrial fission is a fundamental but poorly understood process in plant cells. DYNAMIN-RELATED PROTEIN3A is a conserved eukaryotic mitochondrial fission factor found in Arabidopsis that forms a ring around and severs mitochondria. Here, we identify a novel plant-specific factor, ELONGATED MITOCHONDRIA1, that is required for the correct localization of DRP3A.

  3. Neumetzler, Lutz

    1. Open Access
      Disrupting Two Arabidopsis thaliana Xylosyltransferase Genes Results in Plants Deficient in Xyloglucan, a Major Primary Cell Wall Component
      David M. Cavalier, Olivier Lerouxel, Lutz Neumetzler, Kazuchika Yamauchi, Antje Reinecke, Glenn Freshour, Olga A. Zabotina, Michael G. Hahn, Ingo Burgert, Markus Pauly, Natasha V. Raikhel, Kenneth Keegstra
      Plant Cell Jun 2008, 20 (6) 1519-1537; DOI: https://doi.org/10.1105/tpc.108.059873

      This study adopted a reverse genetics approach to provide evidence that two Arabidopsis xylosyltransferase genes are involved in xyloglucan biosynthesis in vivo. Disrupting both of these genes resulted in plants with a severe root hair phenotype that lacked detectable xyloglucan. These findings challenge conventional models of the plant primary cell wall.

O

  1. Oka, Atsuhiro

    1. Open Access
      Targeted Degradation of the Cyclin-Dependent Kinase Inhibitor ICK4/KRP6 by RING-Type E3 Ligases Is Essential for Mitotic Cell Cycle Progression during Arabidopsis Gametogenesis
      Jingjing Liu, Yiyue Zhang, Genji Qin, Tomohiko Tsuge, Norihiro Sakaguchi, Guo Luo, Kangtai Sun, Dongqiao Shi, Shiori Aki, Nuoyan Zheng, Takashi Aoyama, Atsuhiro Oka, Weicai Yang, Masaaki Umeda, Qi Xie, Hongya Gu, Li-Jia Qu
      Plant Cell Jun 2008, 20 (6) 1538-1554; DOI: https://doi.org/10.1105/tpc.108.059741

      This work uses genetic and biochemical assays to examine two RING-type E3 ligases that interact with and target a specific inhibitor of cyclin-dependent kinases, ICK4/KRP6, for proteasome-mediated degradation. This cell cycle inhibitor is expressed during gametophyte meiosis and must be degraded prior to the subsequent mitotic divisions that form the male and female gametophytes.

  2. Oparka, Karl

    1. You have accessRestricted Access
      Peeking into Pit Fields: A Multiple Twinning Model of Secondary Plasmodesmata Formation in Tobacco
      Christine Faulkner, Ozgur E. Akman, Karen Bell, Chris Jeffree, Karl Oparka
      Plant Cell Jun 2008, 20 (6) 1504-1518; DOI: https://doi.org/10.1105/tpc.107.056903

      Pores called plasmodesmata that connect plant cells arise at cytokinesis and secondarily during wall extension. This work uses a range of imaging and computational approaches to show that secondary plasmodesmata arise in direct contact with existing plasmodesmata during radial wall extension.

P

  1. Palauqui, Jean-Christophe

    1. You have accessRestricted Access
      High-Resolution Whole-Mount Imaging of Three-Dimensional Tissue Organization and Gene Expression Enables the Study of Phloem Development and Structure in Arabidopsis
      Elisabeth Truernit, Hélène Bauby, Bertrand Dubreucq, Olivier Grandjean, John Runions, Julien Barthélémy, Jean-Christophe Palauqui
      Plant Cell Jun 2008, 20 (6) 1494-1503; DOI: https://doi.org/10.1105/tpc.107.056069

      This work images phloem development using a remarkable improvement in plant tissue staining that, in combination with confocal microscopy, reveals three-dimensional cellular organization of plant tissue with a precision that formerly required tissue sectioning. Furthermore, coupled with staining for β-glucuronidase activity, this method shows gene expression with single-cell resolution.

  2. Paschalidis, Konstantinos A.

    1. You have accessRestricted Access
      Spermidine Exodus and Oxidation in the Apoplast Induced by Abiotic Stress Is Responsible for H2O2 Signatures That Direct Tolerance Responses in Tobacco
      Panagiotis N. Moschou, Konstantinos A. Paschalidis, Ioannis D. Delis, Athina H. Andriopoulou, George D. Lagiotis, Dimitrios I. Yakoumakis, Kalliopi A. Roubelakis-Angelakis
      Plant Cell Jun 2008, 20 (6) 1708-1724; DOI: https://doi.org/10.1105/tpc.108.059733

      Polyamines play a protective role against stress challenges in plants. This work shows that abiotic stress induces spermidine secretion into the apoplast, where it is oxidized by polyamine oxidase. Depending on its levels and those of intracellular polyamines, the generated H2O2 induces either tolerance events or programmed cell death.

  3. Pauly, Markus

    1. Open Access
      Disrupting Two Arabidopsis thaliana Xylosyltransferase Genes Results in Plants Deficient in Xyloglucan, a Major Primary Cell Wall Component
      David M. Cavalier, Olivier Lerouxel, Lutz Neumetzler, Kazuchika Yamauchi, Antje Reinecke, Glenn Freshour, Olga A. Zabotina, Michael G. Hahn, Ingo Burgert, Markus Pauly, Natasha V. Raikhel, Kenneth Keegstra
      Plant Cell Jun 2008, 20 (6) 1519-1537; DOI: https://doi.org/10.1105/tpc.108.059873

      This study adopted a reverse genetics approach to provide evidence that two Arabidopsis xylosyltransferase genes are involved in xyloglucan biosynthesis in vivo. Disrupting both of these genes resulted in plants with a severe root hair phenotype that lacked detectable xyloglucan. These findings challenge conventional models of the plant primary cell wall.

  4. Pollmann, Stephan

    1. You have accessRestricted Access
      The Modified Flavonol Glycosylation Profile in the Arabidopsis rol1 Mutants Results in Alterations in Plant Growth and Cell Shape Formation
      Christoph Ringli, Laurent Bigler, Benjamin M. Kuhn, Ruth-Maria Leiber, Anouck Diet, Diana Santelia, Beat Frey, Stephan Pollmann, Markus Klein
      Plant Cell Jun 2008, 20 (6) 1470-1481; DOI: https://doi.org/10.1105/tpc.107.053249

      Flavonoids have been shown to affect growth in a variety of plant species. This work demonstrates that changes in the Arabidopsis flavonol glycosylation profile can interfere with cell development, resulting in defects in cotyledon growth, pavement cell shape, stomatal development, and trichome formation.

Q

  1. Qin, Feng

    1. You have accessRestricted Access
      Arabidopsis DREB2A-Interacting Proteins Function as RING E3 Ligases and Negatively Regulate Plant Drought Stress–Responsive Gene Expression
      Feng Qin, Yoh Sakuma, Lam-Son Phan Tran, Kyonoshin Maruyama, Satoshi Kidokoro, Yasunari Fujita, Miki Fujita, Taishi Umezawa, Yoriko Sawano, Ken-ichi Miyazono, Masaru Tanokura, Kazuo Shinozaki, Kazuko Yamaguchi-Shinozaki
      Plant Cell Jun 2008, 20 (6) 1693-1707; DOI: https://doi.org/10.1105/tpc.107.057380

      Drought-inducible gene expression is controlled by the key transcription factor DREB2A. We identified two C3HC4 RING domain–containing proteins that interact with DREB2A and function as E3 ubiquitin ligases to mediate DREB2A degradation to tightly control DREB2A protein abundance.

  2. Qin, Genji

    1. Open Access
      Targeted Degradation of the Cyclin-Dependent Kinase Inhibitor ICK4/KRP6 by RING-Type E3 Ligases Is Essential for Mitotic Cell Cycle Progression during Arabidopsis Gametogenesis
      Jingjing Liu, Yiyue Zhang, Genji Qin, Tomohiko Tsuge, Norihiro Sakaguchi, Guo Luo, Kangtai Sun, Dongqiao Shi, Shiori Aki, Nuoyan Zheng, Takashi Aoyama, Atsuhiro Oka, Weicai Yang, Masaaki Umeda, Qi Xie, Hongya Gu, Li-Jia Qu
      Plant Cell Jun 2008, 20 (6) 1538-1554; DOI: https://doi.org/10.1105/tpc.108.059741

      This work uses genetic and biochemical assays to examine two RING-type E3 ligases that interact with and target a specific inhibitor of cyclin-dependent kinases, ICK4/KRP6, for proteasome-mediated degradation. This cell cycle inhibitor is expressed during gametophyte meiosis and must be degraded prior to the subsequent mitotic divisions that form the male and female gametophytes.

  3. Qu, Li-Jia

    1. Open Access
      Targeted Degradation of the Cyclin-Dependent Kinase Inhibitor ICK4/KRP6 by RING-Type E3 Ligases Is Essential for Mitotic Cell Cycle Progression during Arabidopsis Gametogenesis
      Jingjing Liu, Yiyue Zhang, Genji Qin, Tomohiko Tsuge, Norihiro Sakaguchi, Guo Luo, Kangtai Sun, Dongqiao Shi, Shiori Aki, Nuoyan Zheng, Takashi Aoyama, Atsuhiro Oka, Weicai Yang, Masaaki Umeda, Qi Xie, Hongya Gu, Li-Jia Qu
      Plant Cell Jun 2008, 20 (6) 1538-1554; DOI: https://doi.org/10.1105/tpc.108.059741

      This work uses genetic and biochemical assays to examine two RING-type E3 ligases that interact with and target a specific inhibitor of cyclin-dependent kinases, ICK4/KRP6, for proteasome-mediated degradation. This cell cycle inhibitor is expressed during gametophyte meiosis and must be degraded prior to the subsequent mitotic divisions that form the male and female gametophytes.

R

  1. Raikhel, Natasha V.

    1. Open Access
      Disrupting Two Arabidopsis thaliana Xylosyltransferase Genes Results in Plants Deficient in Xyloglucan, a Major Primary Cell Wall Component
      David M. Cavalier, Olivier Lerouxel, Lutz Neumetzler, Kazuchika Yamauchi, Antje Reinecke, Glenn Freshour, Olga A. Zabotina, Michael G. Hahn, Ingo Burgert, Markus Pauly, Natasha V. Raikhel, Kenneth Keegstra
      Plant Cell Jun 2008, 20 (6) 1519-1537; DOI: https://doi.org/10.1105/tpc.108.059873

      This study adopted a reverse genetics approach to provide evidence that two Arabidopsis xylosyltransferase genes are involved in xyloglucan biosynthesis in vivo. Disrupting both of these genes resulted in plants with a severe root hair phenotype that lacked detectable xyloglucan. These findings challenge conventional models of the plant primary cell wall.

  2. Reinecke, Antje

    1. Open Access
      Disrupting Two Arabidopsis thaliana Xylosyltransferase Genes Results in Plants Deficient in Xyloglucan, a Major Primary Cell Wall Component
      David M. Cavalier, Olivier Lerouxel, Lutz Neumetzler, Kazuchika Yamauchi, Antje Reinecke, Glenn Freshour, Olga A. Zabotina, Michael G. Hahn, Ingo Burgert, Markus Pauly, Natasha V. Raikhel, Kenneth Keegstra
      Plant Cell Jun 2008, 20 (6) 1519-1537; DOI: https://doi.org/10.1105/tpc.108.059873

      This study adopted a reverse genetics approach to provide evidence that two Arabidopsis xylosyltransferase genes are involved in xyloglucan biosynthesis in vivo. Disrupting both of these genes resulted in plants with a severe root hair phenotype that lacked detectable xyloglucan. These findings challenge conventional models of the plant primary cell wall.

  3. Ringli, Christoph

    1. You have accessRestricted Access
      The Modified Flavonol Glycosylation Profile in the Arabidopsis rol1 Mutants Results in Alterations in Plant Growth and Cell Shape Formation
      Christoph Ringli, Laurent Bigler, Benjamin M. Kuhn, Ruth-Maria Leiber, Anouck Diet, Diana Santelia, Beat Frey, Stephan Pollmann, Markus Klein
      Plant Cell Jun 2008, 20 (6) 1470-1481; DOI: https://doi.org/10.1105/tpc.107.053249

      Flavonoids have been shown to affect growth in a variety of plant species. This work demonstrates that changes in the Arabidopsis flavonol glycosylation profile can interfere with cell development, resulting in defects in cotyledon growth, pavement cell shape, stomatal development, and trichome formation.

  4. Rothstein, Steven J.

    1. You have accessRestricted Access
      Arabidopsis PEROXIN11c-e, FISSION1b, and DYNAMIN-RELATED PROTEIN3A Cooperate in Cell Cycle–Associated Replication of Peroxisomes
      Matthew J. Lingard, Satinder K. Gidda, Scott Bingham, Steven J. Rothstein, Robert T. Mullen, Richard N. Trelease
      Plant Cell Jun 2008, 20 (6) 1567-1585; DOI: https://doi.org/10.1105/tpc.107.057679

      This study examines the molecular interactions of PEROXIN11 isoforms with each other, with FISSION1 isoforms, and with DYNAMIN-RELATED PROTEIN3A (DRP3A) in peroxisome replication during cell division. Gene silencing and protein interaction experiments show that these proteins play distinct but overlapping roles in the elongation and fission of replicating peroxisomes.

  5. Roubelakis-Angelakis, Kalliopi A.

    1. You have accessRestricted Access
      Spermidine Exodus and Oxidation in the Apoplast Induced by Abiotic Stress Is Responsible for H2O2 Signatures That Direct Tolerance Responses in Tobacco
      Panagiotis N. Moschou, Konstantinos A. Paschalidis, Ioannis D. Delis, Athina H. Andriopoulou, George D. Lagiotis, Dimitrios I. Yakoumakis, Kalliopi A. Roubelakis-Angelakis
      Plant Cell Jun 2008, 20 (6) 1708-1724; DOI: https://doi.org/10.1105/tpc.108.059733

      Polyamines play a protective role against stress challenges in plants. This work shows that abiotic stress induces spermidine secretion into the apoplast, where it is oxidized by polyamine oxidase. Depending on its levels and those of intracellular polyamines, the generated H2O2 induces either tolerance events or programmed cell death.

  6. Rouwendal, Gerard

    1. You have accessRestricted Access
      Identification of the Gene Encoding the α1,3-Mannosyltransferase (ALG3) in Arabidopsis and Characterization of Downstream N-Glycan Processing
      Maurice Henquet, Ludwig Lehle, Mariëlle Schreuder, Gerard Rouwendal, Jos Molthoff, Johannes Helsper, Sander van der Krol, Dirk Bosch
      Plant Cell Jun 2008, 20 (6) 1652-1664; DOI: https://doi.org/10.1105/tpc.108.060731

      This work describes the identification of a plant glycosyltransferase that is involved in the initial phase of N-glycan biosynthesis in the endoplasmic reticulum. A detailed analysis of a mutant of this glycosyltransferase provides insights into properties of downstream enzymes in the N-glycan biosynthesis pathway in plants.

  7. Runions, John

    1. You have accessRestricted Access
      High-Resolution Whole-Mount Imaging of Three-Dimensional Tissue Organization and Gene Expression Enables the Study of Phloem Development and Structure in Arabidopsis
      Elisabeth Truernit, Hélène Bauby, Bertrand Dubreucq, Olivier Grandjean, John Runions, Julien Barthélémy, Jean-Christophe Palauqui
      Plant Cell Jun 2008, 20 (6) 1494-1503; DOI: https://doi.org/10.1105/tpc.107.056069

      This work images phloem development using a remarkable improvement in plant tissue staining that, in combination with confocal microscopy, reveals three-dimensional cellular organization of plant tissue with a precision that formerly required tissue sectioning. Furthermore, coupled with staining for β-glucuronidase activity, this method shows gene expression with single-cell resolution.

S

  1. Sakaguchi, Norihiro

    1. Open Access
      Targeted Degradation of the Cyclin-Dependent Kinase Inhibitor ICK4/KRP6 by RING-Type E3 Ligases Is Essential for Mitotic Cell Cycle Progression during Arabidopsis Gametogenesis
      Jingjing Liu, Yiyue Zhang, Genji Qin, Tomohiko Tsuge, Norihiro Sakaguchi, Guo Luo, Kangtai Sun, Dongqiao Shi, Shiori Aki, Nuoyan Zheng, Takashi Aoyama, Atsuhiro Oka, Weicai Yang, Masaaki Umeda, Qi Xie, Hongya Gu, Li-Jia Qu
      Plant Cell Jun 2008, 20 (6) 1538-1554; DOI: https://doi.org/10.1105/tpc.108.059741

      This work uses genetic and biochemical assays to examine two RING-type E3 ligases that interact with and target a specific inhibitor of cyclin-dependent kinases, ICK4/KRP6, for proteasome-mediated degradation. This cell cycle inhibitor is expressed during gametophyte meiosis and must be degraded prior to the subsequent mitotic divisions that form the male and female gametophytes.

  2. Sakamoto, Wataru

    1. You have accessRestricted Access
      Arabidopsis ELONGATED MITOCHONDRIA1 Is Required for Localization of DYNAMIN-RELATED PROTEIN3A to Mitochondrial Fission Sites
      Shin-ichi Arimura, Masaru Fujimoto, Yoko Doniwa, Naoki Kadoya, Mikio Nakazono, Wataru Sakamoto, Nobuhiro Tsutsumi
      Plant Cell Jun 2008, 20 (6) 1555-1566; DOI: https://doi.org/10.1105/tpc.108.058578

      Mitochondrial fission is a fundamental but poorly understood process in plant cells. DYNAMIN-RELATED PROTEIN3A is a conserved eukaryotic mitochondrial fission factor found in Arabidopsis that forms a ring around and severs mitochondria. Here, we identify a novel plant-specific factor, ELONGATED MITOCHONDRIA1, that is required for the correct localization of DRP3A.

  3. Sakuma, Yoh

    1. You have accessRestricted Access
      Arabidopsis DREB2A-Interacting Proteins Function as RING E3 Ligases and Negatively Regulate Plant Drought Stress–Responsive Gene Expression
      Feng Qin, Yoh Sakuma, Lam-Son Phan Tran, Kyonoshin Maruyama, Satoshi Kidokoro, Yasunari Fujita, Miki Fujita, Taishi Umezawa, Yoriko Sawano, Ken-ichi Miyazono, Masaru Tanokura, Kazuo Shinozaki, Kazuko Yamaguchi-Shinozaki
      Plant Cell Jun 2008, 20 (6) 1693-1707; DOI: https://doi.org/10.1105/tpc.107.057380

      Drought-inducible gene expression is controlled by the key transcription factor DREB2A. We identified two C3HC4 RING domain–containing proteins that interact with DREB2A and function as E3 ubiquitin ligases to mediate DREB2A degradation to tightly control DREB2A protein abundance.

  4. Samuels, A. Lacey

    1. Open Access
      Analysis of the Golgi Apparatus in Arabidopsis Seed Coat Cells during Polarized Secretion of Pectin-Rich Mucilage
      Robin E. Young, Heather E. McFarlane, Michael G. Hahn, Tamara L. Western, George W. Haughn, A. Lacey Samuels
      Plant Cell Jun 2008, 20 (6) 1623-1638; DOI: https://doi.org/10.1105/tpc.108.058842

      Golgi stacks in Arabidopsis seed coat cells produce mucilage synchronously at a specific stage of differentiation. The morphology of stacks was dependent on the volume of mucilage produced, but the number was not, suggesting that proliferation of stacks is developmentally programmed. Mucilage-producing Golgi stacks were randomly distributed in the cell and not clustered at the site of secretion.

  5. Santelia, Diana

    1. You have accessRestricted Access
      The Modified Flavonol Glycosylation Profile in the Arabidopsis rol1 Mutants Results in Alterations in Plant Growth and Cell Shape Formation
      Christoph Ringli, Laurent Bigler, Benjamin M. Kuhn, Ruth-Maria Leiber, Anouck Diet, Diana Santelia, Beat Frey, Stephan Pollmann, Markus Klein
      Plant Cell Jun 2008, 20 (6) 1470-1481; DOI: https://doi.org/10.1105/tpc.107.053249

      Flavonoids have been shown to affect growth in a variety of plant species. This work demonstrates that changes in the Arabidopsis flavonol glycosylation profile can interfere with cell development, resulting in defects in cotyledon growth, pavement cell shape, stomatal development, and trichome formation.

  6. Sawano, Yoriko

    1. You have accessRestricted Access
      Arabidopsis DREB2A-Interacting Proteins Function as RING E3 Ligases and Negatively Regulate Plant Drought Stress–Responsive Gene Expression
      Feng Qin, Yoh Sakuma, Lam-Son Phan Tran, Kyonoshin Maruyama, Satoshi Kidokoro, Yasunari Fujita, Miki Fujita, Taishi Umezawa, Yoriko Sawano, Ken-ichi Miyazono, Masaru Tanokura, Kazuo Shinozaki, Kazuko Yamaguchi-Shinozaki
      Plant Cell Jun 2008, 20 (6) 1693-1707; DOI: https://doi.org/10.1105/tpc.107.057380

      Drought-inducible gene expression is controlled by the key transcription factor DREB2A. We identified two C3HC4 RING domain–containing proteins that interact with DREB2A and function as E3 ubiquitin ligases to mediate DREB2A degradation to tightly control DREB2A protein abundance.

  7. Schmidt, Esther E.

    1. You have accessRestricted Access
      Arabidopsis Reactome: A Foundation Knowledgebase for Plant Systems Biology
      Nicolas Tsesmetzis, Matthew Couchman, Janet Higgins, Alison Smith, John H. Doonan, Georg J. Seifert, Esther E. Schmidt, Imre Vastrik, Ewan Birney, Guanming Wu, Peter D'Eustachio, Lincoln D. Stein, Richard J. Morris, Michael W. Bevan, Sean V. Walsh
      Plant Cell Jun 2008, 20 (6) 1426-1436; DOI: https://doi.org/10.1105/tpc.108.057976
  8. Schreuder, Mariëlle

    1. You have accessRestricted Access
      Identification of the Gene Encoding the α1,3-Mannosyltransferase (ALG3) in Arabidopsis and Characterization of Downstream N-Glycan Processing
      Maurice Henquet, Ludwig Lehle, Mariëlle Schreuder, Gerard Rouwendal, Jos Molthoff, Johannes Helsper, Sander van der Krol, Dirk Bosch
      Plant Cell Jun 2008, 20 (6) 1652-1664; DOI: https://doi.org/10.1105/tpc.108.060731

      This work describes the identification of a plant glycosyltransferase that is involved in the initial phase of N-glycan biosynthesis in the endoplasmic reticulum. A detailed analysis of a mutant of this glycosyltransferase provides insights into properties of downstream enzymes in the N-glycan biosynthesis pathway in plants.

  9. Seifert, Georg J.

    1. You have accessRestricted Access
      Arabidopsis Reactome: A Foundation Knowledgebase for Plant Systems Biology
      Nicolas Tsesmetzis, Matthew Couchman, Janet Higgins, Alison Smith, John H. Doonan, Georg J. Seifert, Esther E. Schmidt, Imre Vastrik, Ewan Birney, Guanming Wu, Peter D'Eustachio, Lincoln D. Stein, Richard J. Morris, Michael W. Bevan, Sean V. Walsh
      Plant Cell Jun 2008, 20 (6) 1426-1436; DOI: https://doi.org/10.1105/tpc.108.057976
  10. Seki, Motoaki

    1. You have accessRestricted Access
      Antagonistic Interaction between Systemic Acquired Resistance and the Abscisic Acid–Mediated Abiotic Stress Response in Arabidopsis
      Michiko Yasuda, Atsushi Ishikawa, Yusuke Jikumaru, Motoaki Seki, Taishi Umezawa, Tadao Asami, Akiko Maruyama-Nakashita, Toshiaki Kudo, Kazuo Shinozaki, Shigeo Yoshida, Hideo Nakashita
      Plant Cell Jun 2008, 20 (6) 1678-1692; DOI: https://doi.org/10.1105/tpc.107.054296

      Several types of self-protecting systems that involve hormone signaling allow plants to survive various types of external stresses. This work details antagonistic interactions between abscisic acid–mediated responses to environmental stresses and salicylic acid–mediated signaling in the induction of systemic acquired resistance to pathogens.

  11. Shen, Hui

    1. You have accessRestricted Access
      Light-Induced Phosphorylation and Degradation of the Negative Regulator PHYTOCHROME-INTERACTING FACTOR1 from Arabidopsis Depend upon Its Direct Physical Interactions with Photoactivated Phytochromes
      Hui Shen, Ling Zhu, Alicia Castillon, Manoj Majee, Bruce Downie, Enamul Huq
      Plant Cell Jun 2008, 20 (6) 1586-1602; DOI: https://doi.org/10.1105/tpc.108.060020

      PHYTOCHROME INTERACTING FACTOR1 is rapidly phosphorylated, ubiquitinated, and degraded under red and far-red light. Overexpression of a light-stable truncated PIF1 showed a constitutive photomorphogenic phenotype in the dark, suggesting that light-induced proteolytic degradation of negative regulators (e.g. PIFs) might be sufficient to promote photomorphogenesis.

  12. Shi, Dongqiao

    1. Open Access
      Targeted Degradation of the Cyclin-Dependent Kinase Inhibitor ICK4/KRP6 by RING-Type E3 Ligases Is Essential for Mitotic Cell Cycle Progression during Arabidopsis Gametogenesis
      Jingjing Liu, Yiyue Zhang, Genji Qin, Tomohiko Tsuge, Norihiro Sakaguchi, Guo Luo, Kangtai Sun, Dongqiao Shi, Shiori Aki, Nuoyan Zheng, Takashi Aoyama, Atsuhiro Oka, Weicai Yang, Masaaki Umeda, Qi Xie, Hongya Gu, Li-Jia Qu
      Plant Cell Jun 2008, 20 (6) 1538-1554; DOI: https://doi.org/10.1105/tpc.108.059741

      This work uses genetic and biochemical assays to examine two RING-type E3 ligases that interact with and target a specific inhibitor of cyclin-dependent kinases, ICK4/KRP6, for proteasome-mediated degradation. This cell cycle inhibitor is expressed during gametophyte meiosis and must be degraded prior to the subsequent mitotic divisions that form the male and female gametophytes.

  13. Shinozaki, Kazuo

    1. You have accessRestricted Access
      Antagonistic Interaction between Systemic Acquired Resistance and the Abscisic Acid–Mediated Abiotic Stress Response in Arabidopsis
      Michiko Yasuda, Atsushi Ishikawa, Yusuke Jikumaru, Motoaki Seki, Taishi Umezawa, Tadao Asami, Akiko Maruyama-Nakashita, Toshiaki Kudo, Kazuo Shinozaki, Shigeo Yoshida, Hideo Nakashita
      Plant Cell Jun 2008, 20 (6) 1678-1692; DOI: https://doi.org/10.1105/tpc.107.054296

      Several types of self-protecting systems that involve hormone signaling allow plants to survive various types of external stresses. This work details antagonistic interactions between abscisic acid–mediated responses to environmental stresses and salicylic acid–mediated signaling in the induction of systemic acquired resistance to pathogens.

    2. You have accessRestricted Access
      Arabidopsis DREB2A-Interacting Proteins Function as RING E3 Ligases and Negatively Regulate Plant Drought Stress–Responsive Gene Expression
      Feng Qin, Yoh Sakuma, Lam-Son Phan Tran, Kyonoshin Maruyama, Satoshi Kidokoro, Yasunari Fujita, Miki Fujita, Taishi Umezawa, Yoriko Sawano, Ken-ichi Miyazono, Masaru Tanokura, Kazuo Shinozaki, Kazuko Yamaguchi-Shinozaki
      Plant Cell Jun 2008, 20 (6) 1693-1707; DOI: https://doi.org/10.1105/tpc.107.057380

      Drought-inducible gene expression is controlled by the key transcription factor DREB2A. We identified two C3HC4 RING domain–containing proteins that interact with DREB2A and function as E3 ubiquitin ligases to mediate DREB2A degradation to tightly control DREB2A protein abundance.

  14. Smith, Alison

    1. You have accessRestricted Access
      Arabidopsis Reactome: A Foundation Knowledgebase for Plant Systems Biology
      Nicolas Tsesmetzis, Matthew Couchman, Janet Higgins, Alison Smith, John H. Doonan, Georg J. Seifert, Esther E. Schmidt, Imre Vastrik, Ewan Birney, Guanming Wu, Peter D'Eustachio, Lincoln D. Stein, Richard J. Morris, Michael W. Bevan, Sean V. Walsh
      Plant Cell Jun 2008, 20 (6) 1426-1436; DOI: https://doi.org/10.1105/tpc.108.057976
  15. Stein, Lincoln D.

    1. You have accessRestricted Access
      Arabidopsis Reactome: A Foundation Knowledgebase for Plant Systems Biology
      Nicolas Tsesmetzis, Matthew Couchman, Janet Higgins, Alison Smith, John H. Doonan, Georg J. Seifert, Esther E. Schmidt, Imre Vastrik, Ewan Birney, Guanming Wu, Peter D'Eustachio, Lincoln D. Stein, Richard J. Morris, Michael W. Bevan, Sean V. Walsh
      Plant Cell Jun 2008, 20 (6) 1426-1436; DOI: https://doi.org/10.1105/tpc.108.057976
  16. Sun, Kangtai

    1. Open Access
      Targeted Degradation of the Cyclin-Dependent Kinase Inhibitor ICK4/KRP6 by RING-Type E3 Ligases Is Essential for Mitotic Cell Cycle Progression during Arabidopsis Gametogenesis
      Jingjing Liu, Yiyue Zhang, Genji Qin, Tomohiko Tsuge, Norihiro Sakaguchi, Guo Luo, Kangtai Sun, Dongqiao Shi, Shiori Aki, Nuoyan Zheng, Takashi Aoyama, Atsuhiro Oka, Weicai Yang, Masaaki Umeda, Qi Xie, Hongya Gu, Li-Jia Qu
      Plant Cell Jun 2008, 20 (6) 1538-1554; DOI: https://doi.org/10.1105/tpc.108.059741

      This work uses genetic and biochemical assays to examine two RING-type E3 ligases that interact with and target a specific inhibitor of cyclin-dependent kinases, ICK4/KRP6, for proteasome-mediated degradation. This cell cycle inhibitor is expressed during gametophyte meiosis and must be degraded prior to the subsequent mitotic divisions that form the male and female gametophytes.

T

  1. Tanokura, Masaru

    1. You have accessRestricted Access
      Arabidopsis DREB2A-Interacting Proteins Function as RING E3 Ligases and Negatively Regulate Plant Drought Stress–Responsive Gene Expression
      Feng Qin, Yoh Sakuma, Lam-Son Phan Tran, Kyonoshin Maruyama, Satoshi Kidokoro, Yasunari Fujita, Miki Fujita, Taishi Umezawa, Yoriko Sawano, Ken-ichi Miyazono, Masaru Tanokura, Kazuo Shinozaki, Kazuko Yamaguchi-Shinozaki
      Plant Cell Jun 2008, 20 (6) 1693-1707; DOI: https://doi.org/10.1105/tpc.107.057380

      Drought-inducible gene expression is controlled by the key transcription factor DREB2A. We identified two C3HC4 RING domain–containing proteins that interact with DREB2A and function as E3 ubiquitin ligases to mediate DREB2A degradation to tightly control DREB2A protein abundance.

  2. Tran, Lam-Son Phan

    1. You have accessRestricted Access
      Arabidopsis DREB2A-Interacting Proteins Function as RING E3 Ligases and Negatively Regulate Plant Drought Stress–Responsive Gene Expression
      Feng Qin, Yoh Sakuma, Lam-Son Phan Tran, Kyonoshin Maruyama, Satoshi Kidokoro, Yasunari Fujita, Miki Fujita, Taishi Umezawa, Yoriko Sawano, Ken-ichi Miyazono, Masaru Tanokura, Kazuo Shinozaki, Kazuko Yamaguchi-Shinozaki
      Plant Cell Jun 2008, 20 (6) 1693-1707; DOI: https://doi.org/10.1105/tpc.107.057380

      Drought-inducible gene expression is controlled by the key transcription factor DREB2A. We identified two C3HC4 RING domain–containing proteins that interact with DREB2A and function as E3 ubiquitin ligases to mediate DREB2A degradation to tightly control DREB2A protein abundance.

  3. Trelease, Richard N.

    1. You have accessRestricted Access
      Arabidopsis PEROXIN11c-e, FISSION1b, and DYNAMIN-RELATED PROTEIN3A Cooperate in Cell Cycle–Associated Replication of Peroxisomes
      Matthew J. Lingard, Satinder K. Gidda, Scott Bingham, Steven J. Rothstein, Robert T. Mullen, Richard N. Trelease
      Plant Cell Jun 2008, 20 (6) 1567-1585; DOI: https://doi.org/10.1105/tpc.107.057679

      This study examines the molecular interactions of PEROXIN11 isoforms with each other, with FISSION1 isoforms, and with DYNAMIN-RELATED PROTEIN3A (DRP3A) in peroxisome replication during cell division. Gene silencing and protein interaction experiments show that these proteins play distinct but overlapping roles in the elongation and fission of replicating peroxisomes.

  4. Truernit, Elisabeth

    1. You have accessRestricted Access
      High-Resolution Whole-Mount Imaging of Three-Dimensional Tissue Organization and Gene Expression Enables the Study of Phloem Development and Structure in Arabidopsis
      Elisabeth Truernit, Hélène Bauby, Bertrand Dubreucq, Olivier Grandjean, John Runions, Julien Barthélémy, Jean-Christophe Palauqui
      Plant Cell Jun 2008, 20 (6) 1494-1503; DOI: https://doi.org/10.1105/tpc.107.056069

      This work images phloem development using a remarkable improvement in plant tissue staining that, in combination with confocal microscopy, reveals three-dimensional cellular organization of plant tissue with a precision that formerly required tissue sectioning. Furthermore, coupled with staining for β-glucuronidase activity, this method shows gene expression with single-cell resolution.

  5. Tsesmetzis, Nicolas

    1. You have accessRestricted Access
      Arabidopsis Reactome: A Foundation Knowledgebase for Plant Systems Biology
      Nicolas Tsesmetzis, Matthew Couchman, Janet Higgins, Alison Smith, John H. Doonan, Georg J. Seifert, Esther E. Schmidt, Imre Vastrik, Ewan Birney, Guanming Wu, Peter D'Eustachio, Lincoln D. Stein, Richard J. Morris, Michael W. Bevan, Sean V. Walsh
      Plant Cell Jun 2008, 20 (6) 1426-1436; DOI: https://doi.org/10.1105/tpc.108.057976
  6. Tsuge, Tomohiko

    1. Open Access
      Targeted Degradation of the Cyclin-Dependent Kinase Inhibitor ICK4/KRP6 by RING-Type E3 Ligases Is Essential for Mitotic Cell Cycle Progression during Arabidopsis Gametogenesis
      Jingjing Liu, Yiyue Zhang, Genji Qin, Tomohiko Tsuge, Norihiro Sakaguchi, Guo Luo, Kangtai Sun, Dongqiao Shi, Shiori Aki, Nuoyan Zheng, Takashi Aoyama, Atsuhiro Oka, Weicai Yang, Masaaki Umeda, Qi Xie, Hongya Gu, Li-Jia Qu
      Plant Cell Jun 2008, 20 (6) 1538-1554; DOI: https://doi.org/10.1105/tpc.108.059741

      This work uses genetic and biochemical assays to examine two RING-type E3 ligases that interact with and target a specific inhibitor of cyclin-dependent kinases, ICK4/KRP6, for proteasome-mediated degradation. This cell cycle inhibitor is expressed during gametophyte meiosis and must be degraded prior to the subsequent mitotic divisions that form the male and female gametophytes.

  7. Tsunoda, Satoshi P.

    1. You have accessRestricted Access
      Channelrhodopsin-1 Initiates Phototaxis and Photophobic Responses in Chlamydomonas by Immediate Light-Induced Depolarization
      Peter Berthold, Satoshi P. Tsunoda, Oliver P. Ernst, Wolfgang Mages, Dietrich Gradmann, Peter Hegemann
      Plant Cell Jun 2008, 20 (6) 1665-1677; DOI: https://doi.org/10.1105/tpc.108.057919

      This study reanalyzed channelrhodopsin-1 (CHR1)–based photocurrents in Chlamydomonas and demonstrated that, in addition to H+, ChR1 also conducts other cations. This conductance enables the alga to orient in the light even at alkaline pH.

  8. Tsutsumi, Nobuhiro

    1. You have accessRestricted Access
      Arabidopsis ELONGATED MITOCHONDRIA1 Is Required for Localization of DYNAMIN-RELATED PROTEIN3A to Mitochondrial Fission Sites
      Shin-ichi Arimura, Masaru Fujimoto, Yoko Doniwa, Naoki Kadoya, Mikio Nakazono, Wataru Sakamoto, Nobuhiro Tsutsumi
      Plant Cell Jun 2008, 20 (6) 1555-1566; DOI: https://doi.org/10.1105/tpc.108.058578

      Mitochondrial fission is a fundamental but poorly understood process in plant cells. DYNAMIN-RELATED PROTEIN3A is a conserved eukaryotic mitochondrial fission factor found in Arabidopsis that forms a ring around and severs mitochondria. Here, we identify a novel plant-specific factor, ELONGATED MITOCHONDRIA1, that is required for the correct localization of DRP3A.

U

  1. Umeda, Masaaki

    1. Open Access
      Targeted Degradation of the Cyclin-Dependent Kinase Inhibitor ICK4/KRP6 by RING-Type E3 Ligases Is Essential for Mitotic Cell Cycle Progression during Arabidopsis Gametogenesis
      Jingjing Liu, Yiyue Zhang, Genji Qin, Tomohiko Tsuge, Norihiro Sakaguchi, Guo Luo, Kangtai Sun, Dongqiao Shi, Shiori Aki, Nuoyan Zheng, Takashi Aoyama, Atsuhiro Oka, Weicai Yang, Masaaki Umeda, Qi Xie, Hongya Gu, Li-Jia Qu
      Plant Cell Jun 2008, 20 (6) 1538-1554; DOI: https://doi.org/10.1105/tpc.108.059741

      This work uses genetic and biochemical assays to examine two RING-type E3 ligases that interact with and target a specific inhibitor of cyclin-dependent kinases, ICK4/KRP6, for proteasome-mediated degradation. This cell cycle inhibitor is expressed during gametophyte meiosis and must be degraded prior to the subsequent mitotic divisions that form the male and female gametophytes.

  2. Umezawa, Taishi

    1. You have accessRestricted Access
      Antagonistic Interaction between Systemic Acquired Resistance and the Abscisic Acid–Mediated Abiotic Stress Response in Arabidopsis
      Michiko Yasuda, Atsushi Ishikawa, Yusuke Jikumaru, Motoaki Seki, Taishi Umezawa, Tadao Asami, Akiko Maruyama-Nakashita, Toshiaki Kudo, Kazuo Shinozaki, Shigeo Yoshida, Hideo Nakashita
      Plant Cell Jun 2008, 20 (6) 1678-1692; DOI: https://doi.org/10.1105/tpc.107.054296

      Several types of self-protecting systems that involve hormone signaling allow plants to survive various types of external stresses. This work details antagonistic interactions between abscisic acid–mediated responses to environmental stresses and salicylic acid–mediated signaling in the induction of systemic acquired resistance to pathogens.

    2. You have accessRestricted Access
      Arabidopsis DREB2A-Interacting Proteins Function as RING E3 Ligases and Negatively Regulate Plant Drought Stress–Responsive Gene Expression
      Feng Qin, Yoh Sakuma, Lam-Son Phan Tran, Kyonoshin Maruyama, Satoshi Kidokoro, Yasunari Fujita, Miki Fujita, Taishi Umezawa, Yoriko Sawano, Ken-ichi Miyazono, Masaru Tanokura, Kazuo Shinozaki, Kazuko Yamaguchi-Shinozaki
      Plant Cell Jun 2008, 20 (6) 1693-1707; DOI: https://doi.org/10.1105/tpc.107.057380

      Drought-inducible gene expression is controlled by the key transcription factor DREB2A. We identified two C3HC4 RING domain–containing proteins that interact with DREB2A and function as E3 ubiquitin ligases to mediate DREB2A degradation to tightly control DREB2A protein abundance.

V

  1. van der Krol, Sander

    1. You have accessRestricted Access
      Identification of the Gene Encoding the α1,3-Mannosyltransferase (ALG3) in Arabidopsis and Characterization of Downstream N-Glycan Processing
      Maurice Henquet, Ludwig Lehle, Mariëlle Schreuder, Gerard Rouwendal, Jos Molthoff, Johannes Helsper, Sander van der Krol, Dirk Bosch
      Plant Cell Jun 2008, 20 (6) 1652-1664; DOI: https://doi.org/10.1105/tpc.108.060731

      This work describes the identification of a plant glycosyltransferase that is involved in the initial phase of N-glycan biosynthesis in the endoplasmic reticulum. A detailed analysis of a mutant of this glycosyltransferase provides insights into properties of downstream enzymes in the N-glycan biosynthesis pathway in plants.

  2. Vastrik, Imre

    1. You have accessRestricted Access
      Arabidopsis Reactome: A Foundation Knowledgebase for Plant Systems Biology
      Nicolas Tsesmetzis, Matthew Couchman, Janet Higgins, Alison Smith, John H. Doonan, Georg J. Seifert, Esther E. Schmidt, Imre Vastrik, Ewan Birney, Guanming Wu, Peter D'Eustachio, Lincoln D. Stein, Richard J. Morris, Michael W. Bevan, Sean V. Walsh
      Plant Cell Jun 2008, 20 (6) 1426-1436; DOI: https://doi.org/10.1105/tpc.108.057976
  3. Vega-Sánchez, Miguel E.

    1. You have accessRestricted Access
      SPIN1, a K Homology Domain Protein Negatively Regulated and Ubiquitinated by the E3 Ubiquitin Ligase SPL11, Is Involved in Flowering Time Control in Rice
      Miguel E. Vega-Sánchez, Lirong Zeng, Songbiao Chen, Hei Leung, Guo-Liang Wang
      Plant Cell Jun 2008, 20 (6) 1456-1469; DOI: https://doi.org/10.1105/tpc.108.058610

      Both RNA processing and ubiquitination play important roles in the regulation of flowering. This work implicates the E3 ligase SPOTTED LEAF11 and its substrate SPIN1, a nuclear RNA/DNA binding protein of the STAR family, in rice flowering time control. This study links ubiquitination and RNA/DNA metabolism in flowering time regulation in plants.

W

  1. Walsh, Sean V.

    1. You have accessRestricted Access
      Arabidopsis Reactome: A Foundation Knowledgebase for Plant Systems Biology
      Nicolas Tsesmetzis, Matthew Couchman, Janet Higgins, Alison Smith, John H. Doonan, Georg J. Seifert, Esther E. Schmidt, Imre Vastrik, Ewan Birney, Guanming Wu, Peter D'Eustachio, Lincoln D. Stein, Richard J. Morris, Michael W. Bevan, Sean V. Walsh
      Plant Cell Jun 2008, 20 (6) 1426-1436; DOI: https://doi.org/10.1105/tpc.108.057976
  2. Wang, Guo-Liang

    1. You have accessRestricted Access
      SPIN1, a K Homology Domain Protein Negatively Regulated and Ubiquitinated by the E3 Ubiquitin Ligase SPL11, Is Involved in Flowering Time Control in Rice
      Miguel E. Vega-Sánchez, Lirong Zeng, Songbiao Chen, Hei Leung, Guo-Liang Wang
      Plant Cell Jun 2008, 20 (6) 1456-1469; DOI: https://doi.org/10.1105/tpc.108.058610

      Both RNA processing and ubiquitination play important roles in the regulation of flowering. This work implicates the E3 ligase SPOTTED LEAF11 and its substrate SPIN1, a nuclear RNA/DNA binding protein of the STAR family, in rice flowering time control. This study links ubiquitination and RNA/DNA metabolism in flowering time regulation in plants.

  3. Wang, Jia

    1. You have accessRestricted Access
      Arabidopsis DDB1-CUL4 ASSOCIATED FACTOR1 Forms a Nuclear E3 Ubiquitin Ligase with DDB1 and CUL4 That Is Involved in Multiple Plant Developmental Processes
      Yu Zhang, Suhua Feng, Fangfang Chen, Haodong Chen, Jia Wang, Chad McCall, Yue Xiong, Xing Wang Deng
      Plant Cell Jun 2008, 20 (6) 1437-1455; DOI: https://doi.org/10.1105/tpc.108.058891

      Protein ubiquitination is a key posttranslational modification in eukaryotes. This study reveals a nuclear CULLIN4-based E3 ubiquitin ligase complex in Arabidopsis that plays a role in numerous plant developmental processes.

  4. Western, Tamara L.

    1. Open Access
      Analysis of the Golgi Apparatus in Arabidopsis Seed Coat Cells during Polarized Secretion of Pectin-Rich Mucilage
      Robin E. Young, Heather E. McFarlane, Michael G. Hahn, Tamara L. Western, George W. Haughn, A. Lacey Samuels
      Plant Cell Jun 2008, 20 (6) 1623-1638; DOI: https://doi.org/10.1105/tpc.108.058842

      Golgi stacks in Arabidopsis seed coat cells produce mucilage synchronously at a specific stage of differentiation. The morphology of stacks was dependent on the volume of mucilage produced, but the number was not, suggesting that proliferation of stacks is developmentally programmed. Mucilage-producing Golgi stacks were randomly distributed in the cell and not clustered at the site of secretion.

  5. Wu, Guanming

    1. You have accessRestricted Access
      Arabidopsis Reactome: A Foundation Knowledgebase for Plant Systems Biology
      Nicolas Tsesmetzis, Matthew Couchman, Janet Higgins, Alison Smith, John H. Doonan, Georg J. Seifert, Esther E. Schmidt, Imre Vastrik, Ewan Birney, Guanming Wu, Peter D'Eustachio, Lincoln D. Stein, Richard J. Morris, Michael W. Bevan, Sean V. Walsh
      Plant Cell Jun 2008, 20 (6) 1426-1436; DOI: https://doi.org/10.1105/tpc.108.057976

X

  1. Xie, Qi

    1. Open Access
      Targeted Degradation of the Cyclin-Dependent Kinase Inhibitor ICK4/KRP6 by RING-Type E3 Ligases Is Essential for Mitotic Cell Cycle Progression during Arabidopsis Gametogenesis
      Jingjing Liu, Yiyue Zhang, Genji Qin, Tomohiko Tsuge, Norihiro Sakaguchi, Guo Luo, Kangtai Sun, Dongqiao Shi, Shiori Aki, Nuoyan Zheng, Takashi Aoyama, Atsuhiro Oka, Weicai Yang, Masaaki Umeda, Qi Xie, Hongya Gu, Li-Jia Qu
      Plant Cell Jun 2008, 20 (6) 1538-1554; DOI: https://doi.org/10.1105/tpc.108.059741

      This work uses genetic and biochemical assays to examine two RING-type E3 ligases that interact with and target a specific inhibitor of cyclin-dependent kinases, ICK4/KRP6, for proteasome-mediated degradation. This cell cycle inhibitor is expressed during gametophyte meiosis and must be degraded prior to the subsequent mitotic divisions that form the male and female gametophytes.

  2. Xiong, Yue

    1. You have accessRestricted Access
      Arabidopsis DDB1-CUL4 ASSOCIATED FACTOR1 Forms a Nuclear E3 Ubiquitin Ligase with DDB1 and CUL4 That Is Involved in Multiple Plant Developmental Processes
      Yu Zhang, Suhua Feng, Fangfang Chen, Haodong Chen, Jia Wang, Chad McCall, Yue Xiong, Xing Wang Deng
      Plant Cell Jun 2008, 20 (6) 1437-1455; DOI: https://doi.org/10.1105/tpc.108.058891

      Protein ubiquitination is a key posttranslational modification in eukaryotes. This study reveals a nuclear CULLIN4-based E3 ubiquitin ligase complex in Arabidopsis that plays a role in numerous plant developmental processes.

Y

  1. Yakoumakis, Dimitrios I.

    1. You have accessRestricted Access
      Spermidine Exodus and Oxidation in the Apoplast Induced by Abiotic Stress Is Responsible for H2O2 Signatures That Direct Tolerance Responses in Tobacco
      Panagiotis N. Moschou, Konstantinos A. Paschalidis, Ioannis D. Delis, Athina H. Andriopoulou, George D. Lagiotis, Dimitrios I. Yakoumakis, Kalliopi A. Roubelakis-Angelakis
      Plant Cell Jun 2008, 20 (6) 1708-1724; DOI: https://doi.org/10.1105/tpc.108.059733

      Polyamines play a protective role against stress challenges in plants. This work shows that abiotic stress induces spermidine secretion into the apoplast, where it is oxidized by polyamine oxidase. Depending on its levels and those of intracellular polyamines, the generated H2O2 induces either tolerance events or programmed cell death.

  2. Yamaguchi-Shinozaki, Kazuko

    1. You have accessRestricted Access
      Arabidopsis DREB2A-Interacting Proteins Function as RING E3 Ligases and Negatively Regulate Plant Drought Stress–Responsive Gene Expression
      Feng Qin, Yoh Sakuma, Lam-Son Phan Tran, Kyonoshin Maruyama, Satoshi Kidokoro, Yasunari Fujita, Miki Fujita, Taishi Umezawa, Yoriko Sawano, Ken-ichi Miyazono, Masaru Tanokura, Kazuo Shinozaki, Kazuko Yamaguchi-Shinozaki
      Plant Cell Jun 2008, 20 (6) 1693-1707; DOI: https://doi.org/10.1105/tpc.107.057380

      Drought-inducible gene expression is controlled by the key transcription factor DREB2A. We identified two C3HC4 RING domain–containing proteins that interact with DREB2A and function as E3 ubiquitin ligases to mediate DREB2A degradation to tightly control DREB2A protein abundance.

  3. Yamauchi, Kazuchika

    1. Open Access
      Disrupting Two Arabidopsis thaliana Xylosyltransferase Genes Results in Plants Deficient in Xyloglucan, a Major Primary Cell Wall Component
      David M. Cavalier, Olivier Lerouxel, Lutz Neumetzler, Kazuchika Yamauchi, Antje Reinecke, Glenn Freshour, Olga A. Zabotina, Michael G. Hahn, Ingo Burgert, Markus Pauly, Natasha V. Raikhel, Kenneth Keegstra
      Plant Cell Jun 2008, 20 (6) 1519-1537; DOI: https://doi.org/10.1105/tpc.108.059873

      This study adopted a reverse genetics approach to provide evidence that two Arabidopsis xylosyltransferase genes are involved in xyloglucan biosynthesis in vivo. Disrupting both of these genes resulted in plants with a severe root hair phenotype that lacked detectable xyloglucan. These findings challenge conventional models of the plant primary cell wall.

  4. Yang, Weicai

    1. Open Access
      Targeted Degradation of the Cyclin-Dependent Kinase Inhibitor ICK4/KRP6 by RING-Type E3 Ligases Is Essential for Mitotic Cell Cycle Progression during Arabidopsis Gametogenesis
      Jingjing Liu, Yiyue Zhang, Genji Qin, Tomohiko Tsuge, Norihiro Sakaguchi, Guo Luo, Kangtai Sun, Dongqiao Shi, Shiori Aki, Nuoyan Zheng, Takashi Aoyama, Atsuhiro Oka, Weicai Yang, Masaaki Umeda, Qi Xie, Hongya Gu, Li-Jia Qu
      Plant Cell Jun 2008, 20 (6) 1538-1554; DOI: https://doi.org/10.1105/tpc.108.059741

      This work uses genetic and biochemical assays to examine two RING-type E3 ligases that interact with and target a specific inhibitor of cyclin-dependent kinases, ICK4/KRP6, for proteasome-mediated degradation. This cell cycle inhibitor is expressed during gametophyte meiosis and must be degraded prior to the subsequent mitotic divisions that form the male and female gametophytes.

  5. Yasuda, Michiko

    1. You have accessRestricted Access
      Antagonistic Interaction between Systemic Acquired Resistance and the Abscisic Acid–Mediated Abiotic Stress Response in Arabidopsis
      Michiko Yasuda, Atsushi Ishikawa, Yusuke Jikumaru, Motoaki Seki, Taishi Umezawa, Tadao Asami, Akiko Maruyama-Nakashita, Toshiaki Kudo, Kazuo Shinozaki, Shigeo Yoshida, Hideo Nakashita
      Plant Cell Jun 2008, 20 (6) 1678-1692; DOI: https://doi.org/10.1105/tpc.107.054296

      Several types of self-protecting systems that involve hormone signaling allow plants to survive various types of external stresses. This work details antagonistic interactions between abscisic acid–mediated responses to environmental stresses and salicylic acid–mediated signaling in the induction of systemic acquired resistance to pathogens.

  6. Yoshida, Shigeo

    1. You have accessRestricted Access
      Antagonistic Interaction between Systemic Acquired Resistance and the Abscisic Acid–Mediated Abiotic Stress Response in Arabidopsis
      Michiko Yasuda, Atsushi Ishikawa, Yusuke Jikumaru, Motoaki Seki, Taishi Umezawa, Tadao Asami, Akiko Maruyama-Nakashita, Toshiaki Kudo, Kazuo Shinozaki, Shigeo Yoshida, Hideo Nakashita
      Plant Cell Jun 2008, 20 (6) 1678-1692; DOI: https://doi.org/10.1105/tpc.107.054296

      Several types of self-protecting systems that involve hormone signaling allow plants to survive various types of external stresses. This work details antagonistic interactions between abscisic acid–mediated responses to environmental stresses and salicylic acid–mediated signaling in the induction of systemic acquired resistance to pathogens.

  7. Young, Robin E.

    1. Open Access
      Analysis of the Golgi Apparatus in Arabidopsis Seed Coat Cells during Polarized Secretion of Pectin-Rich Mucilage
      Robin E. Young, Heather E. McFarlane, Michael G. Hahn, Tamara L. Western, George W. Haughn, A. Lacey Samuels
      Plant Cell Jun 2008, 20 (6) 1623-1638; DOI: https://doi.org/10.1105/tpc.108.058842

      Golgi stacks in Arabidopsis seed coat cells produce mucilage synchronously at a specific stage of differentiation. The morphology of stacks was dependent on the volume of mucilage produced, but the number was not, suggesting that proliferation of stacks is developmentally programmed. Mucilage-producing Golgi stacks were randomly distributed in the cell and not clustered at the site of secretion.

Z

  1. Zabotina, Olga A.

    1. Open Access
      Disrupting Two Arabidopsis thaliana Xylosyltransferase Genes Results in Plants Deficient in Xyloglucan, a Major Primary Cell Wall Component
      David M. Cavalier, Olivier Lerouxel, Lutz Neumetzler, Kazuchika Yamauchi, Antje Reinecke, Glenn Freshour, Olga A. Zabotina, Michael G. Hahn, Ingo Burgert, Markus Pauly, Natasha V. Raikhel, Kenneth Keegstra
      Plant Cell Jun 2008, 20 (6) 1519-1537; DOI: https://doi.org/10.1105/tpc.108.059873

      This study adopted a reverse genetics approach to provide evidence that two Arabidopsis xylosyltransferase genes are involved in xyloglucan biosynthesis in vivo. Disrupting both of these genes resulted in plants with a severe root hair phenotype that lacked detectable xyloglucan. These findings challenge conventional models of the plant primary cell wall.

  2. Zeng, Lirong

    1. You have accessRestricted Access
      SPIN1, a K Homology Domain Protein Negatively Regulated and Ubiquitinated by the E3 Ubiquitin Ligase SPL11, Is Involved in Flowering Time Control in Rice
      Miguel E. Vega-Sánchez, Lirong Zeng, Songbiao Chen, Hei Leung, Guo-Liang Wang
      Plant Cell Jun 2008, 20 (6) 1456-1469; DOI: https://doi.org/10.1105/tpc.108.058610

      Both RNA processing and ubiquitination play important roles in the regulation of flowering. This work implicates the E3 ligase SPOTTED LEAF11 and its substrate SPIN1, a nuclear RNA/DNA binding protein of the STAR family, in rice flowering time control. This study links ubiquitination and RNA/DNA metabolism in flowering time regulation in plants.

  3. Zhang, Yiyue

    1. Open Access
      Targeted Degradation of the Cyclin-Dependent Kinase Inhibitor ICK4/KRP6 by RING-Type E3 Ligases Is Essential for Mitotic Cell Cycle Progression during Arabidopsis Gametogenesis
      Jingjing Liu, Yiyue Zhang, Genji Qin, Tomohiko Tsuge, Norihiro Sakaguchi, Guo Luo, Kangtai Sun, Dongqiao Shi, Shiori Aki, Nuoyan Zheng, Takashi Aoyama, Atsuhiro Oka, Weicai Yang, Masaaki Umeda, Qi Xie, Hongya Gu, Li-Jia Qu
      Plant Cell Jun 2008, 20 (6) 1538-1554; DOI: https://doi.org/10.1105/tpc.108.059741

      This work uses genetic and biochemical assays to examine two RING-type E3 ligases that interact with and target a specific inhibitor of cyclin-dependent kinases, ICK4/KRP6, for proteasome-mediated degradation. This cell cycle inhibitor is expressed during gametophyte meiosis and must be degraded prior to the subsequent mitotic divisions that form the male and female gametophytes.

  4. Zhang, Yu

    1. You have accessRestricted Access
      Arabidopsis DDB1-CUL4 ASSOCIATED FACTOR1 Forms a Nuclear E3 Ubiquitin Ligase with DDB1 and CUL4 That Is Involved in Multiple Plant Developmental Processes
      Yu Zhang, Suhua Feng, Fangfang Chen, Haodong Chen, Jia Wang, Chad McCall, Yue Xiong, Xing Wang Deng
      Plant Cell Jun 2008, 20 (6) 1437-1455; DOI: https://doi.org/10.1105/tpc.108.058891

      Protein ubiquitination is a key posttranslational modification in eukaryotes. This study reveals a nuclear CULLIN4-based E3 ubiquitin ligase complex in Arabidopsis that plays a role in numerous plant developmental processes.

  5. Zhao, Qiao

    1. You have accessRestricted Access
      Two Distinct Interacting Classes of Nuclear Envelope–Associated Coiled-Coil Proteins Are Required for the Tissue-Specific Nuclear Envelope Targeting of Arabidopsis RanGAP
      Qiao Zhao, Jelena Brkljacic, Iris Meier
      Plant Cell Jun 2008, 20 (6) 1639-1651; DOI: https://doi.org/10.1105/tpc.108.059220

      Tandem affinity purification and mass spectrometry were used to identify a family of novel coiled-coil proteins required for nuclear envelope association of RanGAP1 in Arabidopsis root tip cells. The findings suggest an unanticipated complexity of RanGAP nuclear envelope targeting in higher plant cells, involving at least two families of likely plant-specific nuclear pore–associated proteins.

  6. Zheng, Nuoyan

    1. Open Access
      Targeted Degradation of the Cyclin-Dependent Kinase Inhibitor ICK4/KRP6 by RING-Type E3 Ligases Is Essential for Mitotic Cell Cycle Progression during Arabidopsis Gametogenesis
      Jingjing Liu, Yiyue Zhang, Genji Qin, Tomohiko Tsuge, Norihiro Sakaguchi, Guo Luo, Kangtai Sun, Dongqiao Shi, Shiori Aki, Nuoyan Zheng, Takashi Aoyama, Atsuhiro Oka, Weicai Yang, Masaaki Umeda, Qi Xie, Hongya Gu, Li-Jia Qu
      Plant Cell Jun 2008, 20 (6) 1538-1554; DOI: https://doi.org/10.1105/tpc.108.059741

      This work uses genetic and biochemical assays to examine two RING-type E3 ligases that interact with and target a specific inhibitor of cyclin-dependent kinases, ICK4/KRP6, for proteasome-mediated degradation. This cell cycle inhibitor is expressed during gametophyte meiosis and must be degraded prior to the subsequent mitotic divisions that form the male and female gametophytes.

  7. Zhu, Ling

    1. You have accessRestricted Access
      Light-Induced Phosphorylation and Degradation of the Negative Regulator PHYTOCHROME-INTERACTING FACTOR1 from Arabidopsis Depend upon Its Direct Physical Interactions with Photoactivated Phytochromes
      Hui Shen, Ling Zhu, Alicia Castillon, Manoj Majee, Bruce Downie, Enamul Huq
      Plant Cell Jun 2008, 20 (6) 1586-1602; DOI: https://doi.org/10.1105/tpc.108.060020

      PHYTOCHROME INTERACTING FACTOR1 is rapidly phosphorylated, ubiquitinated, and degraded under red and far-red light. Overexpression of a light-stable truncated PIF1 showed a constitutive photomorphogenic phenotype in the dark, suggesting that light-induced proteolytic degradation of negative regulators (e.g. PIFs) might be sufficient to promote photomorphogenesis.

  8. Zhu, Yu-Xian

    1. Open Access
      Mutation of Arabidopsis BARD1 Causes Meristem Defects by Failing to Confine WUSCHEL Expression to the Organizing Center
      Pei Han, Qing Li, Yu-Xian Zhu
      Plant Cell Jun 2008, 20 (6) 1482-1493; DOI: https://doi.org/10.1105/tpc.108.058867

      BARD1 represses the transcriptional activity of WUSCHEL, a gene essential for maintenance of stem cell fate in Arabidopsis. In a bard1-null mutant, severe shoot apical meristem defects are observed as a result of WUSCHEL expression outside of the meristem organizing center. BARD1 may inhibit a chromatin-remodeling process vital for WUS expression.

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The Plant Cell Online: 20 (6)
The Plant Cell
Vol. 20, Issue 6
June 2008
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