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Table of Contents

The Plant Cell Online: 19 (4)
Apr 2007
  • A
  • B
  • C
  • D
  • E
  • F
  • G
  • H
  • I
  • J
  • K
  • L
  • M
  • N
  • O
  • P
  • Q
  • R
  • S
  • T
  • U
  • V
  • W
  • X
  • Y
  • Z

A

  1. Adachi, Sumiko

    1. You have accessRestricted Access
      The Arabidopsis D-Type Cyclin CYCD4 Controls Cell Division in the Stomatal Lineage of the Hypocotyl Epidermis
      Atsushi Kono, Chikage Umeda-Hara, Sumiko Adachi, Noriko Nagata, Mami Konomi, Tsuyoshi Nakagawa, Hirofumi Uchimiya, Masaaki Umeda
      Plant Cell Apr 2007, 19 (4) 1265-1277; DOI: https://doi.org/10.1105/tpc.106.046763

      D-type cyclins play an essential role in cell cycle progression in response to external signals. This study demonstrates a specific requirement of cyclin D in cell divisions associated with stomatal precursor formation in the hypocotyl.

  2. Albrecht, Verónica

    1. You have accessRestricted Access
      The Balance between Protein Synthesis and Degradation in Chloroplasts Determines Leaf Variegation in Arabidopsis yellow variegated Mutants
      Eiko Miura, Yusuke Kato, Ryo Matsushima, Verónica Albrecht, Soumaya Laalami, Wataru Sakamoto
      Plant Cell Apr 2007, 19 (4) 1313-1328; DOI: https://doi.org/10.1105/tpc.106.049270

      Leaf variegation has long been recognized as a genetic trait, but the question remains as to why and how green and white sectors are formed in the same leaf in a uniform genetic background. In this work, identification of trans-acting mutations that suppress leaf variegation in an Arabidopsis mutant demonstrates a mechanism for variegation associated with chloroplast activities.

  3. Anderson, David

    1. Open Access
      Heterotrimeric G Protein γ Subunits Provide Functional Selectivity in Gβγ Dimer Signaling in Arabidopsis
      Yuri Trusov, James Edward Rookes, Kimberley Tilbrook, David Chakravorty, Michael Glenn Mason, David Anderson, Jin-Gui Chen, Alan M. Jones, José Ramón Botella
      Plant Cell Apr 2007, 19 (4) 1235-1250; DOI: https://doi.org/10.1105/tpc.107.050096

      G proteins are important signaling molecules in plants and animal systems. This work provides evidence that plant heterotrimeric G proteins use both Gγ subunits to convey functional selectivity to the Gβγ dimers and reveals a mechanism underlying the complexity of G protein–mediated signaling in plants.

  4. Arrieta-Montiel, Maria

    1. Open Access
      Plant Mitochondrial Recombination Surveillance Requires Unusual RecA and MutS Homologs
      Vikas Shedge, Maria Arrieta-Montiel, Alan C. Christensen, Sally A. Mackenzie
      Plant Cell Apr 2007, 19 (4) 1251-1264; DOI: https://doi.org/10.1105/tpc.106.048355

      Substoichiometric shifting (SSS) is the amplification or suppression of subgenomic molecules in plant mitochondrial genomes. This report describes two nuclear genes, MSH1 and RECA3, that regulate SSS in Arabidopsis by controlling illegitimate recombination and presents the cellular and developmental implications of msh1 and recA3 mutant-associated mitochondrial genome instability in plants.

  5. Ashworth, Edward N.

    1. Open Access
      SIZ1-Mediated Sumoylation of ICE1 Controls CBF3/DREB1A Expression and Freezing Tolerance in Arabidopsis
      Kenji Miura, Jing Bo Jin, Jiyoung Lee, Chan Yul Yoo, Vicki Stirm, Tomoko Miura, Edward N. Ashworth, Ray A. Bressan, Dae-Jin Yun, Paul M. Hasegawa
      Plant Cell Apr 2007, 19 (4) 1403-1414; DOI: https://doi.org/10.1105/tpc.106.048397

      Low temperatures initiate signaling pathways that control gene expression necessary for cold acclimation and chilling and freezing tolerances. This work establishes that SIZ1 is a regulator of cold acclimation through sumoylation of ICE1, which induces expression of CBF/DREB1 and its regulon and facilitates freezing tolerance.

B

  1. Barton, M. Kathryn

    1. You have accessRestricted Access
      Making Holes in Leaves: Promoting Cell State Transitions in Stomatal Development
      M. Kathryn Barton
      Plant Cell Apr 2007, 19 (4) 1140-1143; DOI: https://doi.org/10.1105/tpc.107.051177
  2. Botella, José Ramón

    1. Open Access
      Heterotrimeric G Protein γ Subunits Provide Functional Selectivity in Gβγ Dimer Signaling in Arabidopsis
      Yuri Trusov, James Edward Rookes, Kimberley Tilbrook, David Chakravorty, Michael Glenn Mason, David Anderson, Jin-Gui Chen, Alan M. Jones, José Ramón Botella
      Plant Cell Apr 2007, 19 (4) 1235-1250; DOI: https://doi.org/10.1105/tpc.107.050096

      G proteins are important signaling molecules in plants and animal systems. This work provides evidence that plant heterotrimeric G proteins use both Gγ subunits to convey functional selectivity to the Gβγ dimers and reveals a mechanism underlying the complexity of G protein–mediated signaling in plants.

  3. Branigan, Caroline

    1. You have accessRestricted Access
      The Transcription Factor WIN1/SHN1 Regulates Cutin Biosynthesis in Arabidopsis thaliana
      Rubini Kannangara, Caroline Branigan, Yan Liu, Teresa Penfield, Vijaya Rao, Grégory Mouille, Herman Höfte, Markus Pauly, José Luis Riechmann, Pierre Broun
      Plant Cell Apr 2007, 19 (4) 1278-1294; DOI: https://doi.org/10.1105/tpc.106.047076

      The protective role of a plant's cuticle in abiotic stress and biotic interactions depends on its permeability. These results suggest that the transcription factor WAX INDUCER1 controls cuticle formation by directly or collaboratively activating the transcription of cutin biosynthesis genes and modulates cuticle permeability through its influence on cutin composition.

  4. Bressan, Ray A.

    1. Open Access
      SIZ1-Mediated Sumoylation of ICE1 Controls CBF3/DREB1A Expression and Freezing Tolerance in Arabidopsis
      Kenji Miura, Jing Bo Jin, Jiyoung Lee, Chan Yul Yoo, Vicki Stirm, Tomoko Miura, Edward N. Ashworth, Ray A. Bressan, Dae-Jin Yun, Paul M. Hasegawa
      Plant Cell Apr 2007, 19 (4) 1403-1414; DOI: https://doi.org/10.1105/tpc.106.048397

      Low temperatures initiate signaling pathways that control gene expression necessary for cold acclimation and chilling and freezing tolerances. This work establishes that SIZ1 is a regulator of cold acclimation through sumoylation of ICE1, which induces expression of CBF/DREB1 and its regulon and facilitates freezing tolerance.

  5. Broun, Pierre

    1. You have accessRestricted Access
      The Transcription Factor WIN1/SHN1 Regulates Cutin Biosynthesis in Arabidopsis thaliana
      Rubini Kannangara, Caroline Branigan, Yan Liu, Teresa Penfield, Vijaya Rao, Grégory Mouille, Herman Höfte, Markus Pauly, José Luis Riechmann, Pierre Broun
      Plant Cell Apr 2007, 19 (4) 1278-1294; DOI: https://doi.org/10.1105/tpc.106.047076

      The protective role of a plant's cuticle in abiotic stress and biotic interactions depends on its permeability. These results suggest that the transcription factor WAX INDUCER1 controls cuticle formation by directly or collaboratively activating the transcription of cutin biosynthesis genes and modulates cuticle permeability through its influence on cutin composition.

C

  1. Calderon-Villalobos, Luz Irina A.

    1. You have accessRestricted Access
      Characterization of the VIER F-BOX PROTEINE Genes from Arabidopsis Reveals Their Importance for Plant Growth and Development
      Katja M. Schwager, Luz Irina A. Calderon-Villalobos, Esther M.N. Dohmann, Björn C. Willige, Stephan Knierer, Carola Nill, Claus Schwechheimer
      Plant Cell Apr 2007, 19 (4) 1163-1178; DOI: https://doi.org/10.1105/tpc.105.040675

      E3 ubiquitin ligases target proteins for ubiquitin proteasome–mediated degradation, with substrate specificity conferred by F-box protein subunits. Plants have apparently recruited F-box proteins of the C subfamily to regulate phytohormone responses, axillary branching, and senescence, and this study suggests that VIER F-BOX PROTEINE family members function in lateral root formation and plant growth.

  2. Cao, Wanhong

    1. Open Access
      SCABP8/CBL10, a Putative Calcium Sensor, Interacts with the Protein Kinase SOS2 to Protect Arabidopsis Shoots from Salt Stress
      Ruidang Quan, Huixin Lin, Imelda Mendoza, Yuguo Zhang, Wanhong Cao, Yongqing Yang, Mei Shang, Shouyi Chen, José M. Pardo, Yan Guo
      Plant Cell Apr 2007, 19 (4) 1415-1431; DOI: https://doi.org/10.1105/tpc.106.042291

      Functionally equivalent genes often display spatial and temporal differences in transcriptional regulation but may also have unique functions. As shown here, the similar calcium binding proteins SCABP8 and SOS3 protect shoot and root tissues, respectively, from salt stress by activating and recruiting the SOS2 kinase, but they also differ in additional regulatory mechanisms specific to each protein.

  3. Chakravorty, David

    1. Open Access
      Heterotrimeric G Protein γ Subunits Provide Functional Selectivity in Gβγ Dimer Signaling in Arabidopsis
      Yuri Trusov, James Edward Rookes, Kimberley Tilbrook, David Chakravorty, Michael Glenn Mason, David Anderson, Jin-Gui Chen, Alan M. Jones, José Ramón Botella
      Plant Cell Apr 2007, 19 (4) 1235-1250; DOI: https://doi.org/10.1105/tpc.107.050096

      G proteins are important signaling molecules in plants and animal systems. This work provides evidence that plant heterotrimeric G proteins use both Gγ subunits to convey functional selectivity to the Gβγ dimers and reveals a mechanism underlying the complexity of G protein–mediated signaling in plants.

  4. Chen, Jin-Gui

    1. Open Access
      Heterotrimeric G Protein γ Subunits Provide Functional Selectivity in Gβγ Dimer Signaling in Arabidopsis
      Yuri Trusov, James Edward Rookes, Kimberley Tilbrook, David Chakravorty, Michael Glenn Mason, David Anderson, Jin-Gui Chen, Alan M. Jones, José Ramón Botella
      Plant Cell Apr 2007, 19 (4) 1235-1250; DOI: https://doi.org/10.1105/tpc.107.050096

      G proteins are important signaling molecules in plants and animal systems. This work provides evidence that plant heterotrimeric G proteins use both Gγ subunits to convey functional selectivity to the Gβγ dimers and reveals a mechanism underlying the complexity of G protein–mediated signaling in plants.

  5. Chen, Shouyi

    1. Open Access
      SCABP8/CBL10, a Putative Calcium Sensor, Interacts with the Protein Kinase SOS2 to Protect Arabidopsis Shoots from Salt Stress
      Ruidang Quan, Huixin Lin, Imelda Mendoza, Yuguo Zhang, Wanhong Cao, Yongqing Yang, Mei Shang, Shouyi Chen, José M. Pardo, Yan Guo
      Plant Cell Apr 2007, 19 (4) 1415-1431; DOI: https://doi.org/10.1105/tpc.106.042291

      Functionally equivalent genes often display spatial and temporal differences in transcriptional regulation but may also have unique functions. As shown here, the similar calcium binding proteins SCABP8 and SOS3 protect shoot and root tissues, respectively, from salt stress by activating and recruiting the SOS2 kinase, but they also differ in additional regulatory mechanisms specific to each protein.

  6. Chen, Zhixiang

    1. You have accessRestricted Access
      Roles of Arabidopsis Cyclin-Dependent Kinase C Complexes in Cauliflower Mosaic Virus Infection, Plant Growth, and Development
      Xiaofeng Cui, Baofang Fan, James Scholz, Zhixiang Chen
      Plant Cell Apr 2007, 19 (4) 1388-1402; DOI: https://doi.org/10.1105/tpc.107.051375

      Arabidopsis cyclin-dependent kinase CDKC;2 and its cyclin T partner CYCT1;5 encode two interacting proteins that form a complex with an important role in cauliflower mosaic virus (CaMV) infection. This report establishes these CDKC kinase complexes as important host targets of CaMV for transcriptional activation of viral genes and critical regulators of plant growth and development.

  7. Chi, Wei

    1. You have accessRestricted Access
      Formation of DEG5 and DEG8 Complexes and Their Involvement in the Degradation of Photodamaged Photosystem II Reaction Center D1 Protein in Arabidopsis
      Xuwu Sun, Lianwei Peng, Jinkui Guo, Wei Chi, Jinfang Ma, Congming Lu, Lixin Zhang
      Plant Cell Apr 2007, 19 (4) 1347-1361; DOI: https://doi.org/10.1105/tpc.106.049510

      The widely distributed DEGP proteases play important roles in the degradation of damaged and misfolded proteins. This report reveals that Arabidopsis DEG5 and DEG8 form a hexamer in the thylakoid lumen and are important for efficient turnover of the photosystem II D1 protein and for protection against photoinhibition in vivo.

  8. Choi, Giltsu

    1. You have accessRestricted Access
      PIL5, a Phytochrome-Interacting bHLH Protein, Regulates Gibberellin Responsiveness by Binding Directly to the GAI and RGA Promoters in Arabidopsis Seeds
      Eunkyoo Oh, Shinjiro Yamaguchi, Jianhong Hu, Jikumaru Yusuke, Byunghyuck Jung, Inyup Paik, Hee-Seung Lee, Tai-ping Sun, Yuji Kamiya, Giltsu Choi
      Plant Cell Apr 2007, 19 (4) 1192-1208; DOI: https://doi.org/10.1105/tpc.107.050153

      In plants, the proper decision to germinate is critical for plant survival. Light promotes seed germination by removing PIL5, a phytochrome-interacting light-labile bHLH transcription factor. It is shown here that PIL5 regulates gibberellin (GA) signaling genes by directly binding to their promoters and that PIL5-mediated light signaling regulates not only GA but also abscisic acid metabolism.

  9. Christensen, Alan C.

    1. Open Access
      Plant Mitochondrial Recombination Surveillance Requires Unusual RecA and MutS Homologs
      Vikas Shedge, Maria Arrieta-Montiel, Alan C. Christensen, Sally A. Mackenzie
      Plant Cell Apr 2007, 19 (4) 1251-1264; DOI: https://doi.org/10.1105/tpc.106.048355

      Substoichiometric shifting (SSS) is the amplification or suppression of subgenomic molecules in plant mitochondrial genomes. This report describes two nuclear genes, MSH1 and RECA3, that regulate SSS in Arabidopsis by controlling illegitimate recombination and presents the cellular and developmental implications of msh1 and recA3 mutant-associated mitochondrial genome instability in plants.

  10. Cook, Doug R.

    1. You have accessRestricted Access
      An ERF Transcription Factor in Medicago truncatula That Is Essential for Nod Factor Signal Transduction
      Patrick H. Middleton, Júlia Jakab, R. Varma Penmetsa, Colby G. Starker, Jake Doll, Péter Kaló, Radhika Prabhu, John F. Marsh, Raka M. Mitra, Attila Kereszt, Brigitta Dudas, Kathryn VandenBosch, Sharon R. Long, Doug R. Cook, Gyorgy B. Kiss, Giles E.D. Oldroyd
      Plant Cell Apr 2007, 19 (4) 1221-1234; DOI: https://doi.org/10.1105/tpc.106.048264

      Legume/rhizobial symbiosis is a key player in the global nitrogen cycle by fixing atmospheric nitrogen. Recognition of bacteria by legumes requires the bacterial signaling molecule Nod factor, which induces early plant root responses in nodulation. This work identifies the transcription factor ERF Required for Nodulation as an important component of the Nod factor signal transduction pathway.

  11. Cui, Xiaofeng

    1. You have accessRestricted Access
      Roles of Arabidopsis Cyclin-Dependent Kinase C Complexes in Cauliflower Mosaic Virus Infection, Plant Growth, and Development
      Xiaofeng Cui, Baofang Fan, James Scholz, Zhixiang Chen
      Plant Cell Apr 2007, 19 (4) 1388-1402; DOI: https://doi.org/10.1105/tpc.107.051375

      Arabidopsis cyclin-dependent kinase CDKC;2 and its cyclin T partner CYCT1;5 encode two interacting proteins that form a complex with an important role in cauliflower mosaic virus (CaMV) infection. This report establishes these CDKC kinase complexes as important host targets of CaMV for transcriptional activation of viral genes and critical regulators of plant growth and development.

D

  1. Dohmann, Esther M.N.

    1. You have accessRestricted Access
      Characterization of the VIER F-BOX PROTEINE Genes from Arabidopsis Reveals Their Importance for Plant Growth and Development
      Katja M. Schwager, Luz Irina A. Calderon-Villalobos, Esther M.N. Dohmann, Björn C. Willige, Stephan Knierer, Carola Nill, Claus Schwechheimer
      Plant Cell Apr 2007, 19 (4) 1163-1178; DOI: https://doi.org/10.1105/tpc.105.040675

      E3 ubiquitin ligases target proteins for ubiquitin proteasome–mediated degradation, with substrate specificity conferred by F-box protein subunits. Plants have apparently recruited F-box proteins of the C subfamily to regulate phytohormone responses, axillary branching, and senescence, and this study suggests that VIER F-BOX PROTEINE family members function in lateral root formation and plant growth.

    2. You have accessRestricted Access
      The DELLA Domain of GA INSENSITIVE Mediates the Interaction with the GA INSENSITIVE DWARF1A Gibberellin Receptor of Arabidopsis
      Björn C. Willige, Soumya Ghosh, Carola Nill, Melina Zourelidou, Esther M.N. Dohmann, Andreas Maier, Claus Schwechheimer
      Plant Cell Apr 2007, 19 (4) 1209-1220; DOI: https://doi.org/10.1105/tpc.107.051441

      Gibberellic acid (GA) responses are repressed by proteins with a DELLA domain, which is essential for GA-dependent proteasomal degradation of the DELLA repressors. This work reveals that DELLA domain mutations described for a range of dwarfing alleles impair GA receptor interactions and that the DELLA domain of the repressor GIBBERELLIC ACID INSENSITIVE is sufficient for this interaction.

  2. Doll, Jake

    1. You have accessRestricted Access
      An ERF Transcription Factor in Medicago truncatula That Is Essential for Nod Factor Signal Transduction
      Patrick H. Middleton, Júlia Jakab, R. Varma Penmetsa, Colby G. Starker, Jake Doll, Péter Kaló, Radhika Prabhu, John F. Marsh, Raka M. Mitra, Attila Kereszt, Brigitta Dudas, Kathryn VandenBosch, Sharon R. Long, Doug R. Cook, Gyorgy B. Kiss, Giles E.D. Oldroyd
      Plant Cell Apr 2007, 19 (4) 1221-1234; DOI: https://doi.org/10.1105/tpc.106.048264

      Legume/rhizobial symbiosis is a key player in the global nitrogen cycle by fixing atmospheric nitrogen. Recognition of bacteria by legumes requires the bacterial signaling molecule Nod factor, which induces early plant root responses in nodulation. This work identifies the transcription factor ERF Required for Nodulation as an important component of the Nod factor signal transduction pathway.

  3. Donn, Guenter

    1. You have accessRestricted Access
      Maize Histone Deacetylase hda101 Is Involved in Plant Development, Gene Transcription, and Sequence-Specific Modulation of Histone Modification of Genes and Repeats
      Vincenzo Rossi, Sabrina Locatelli, Serena Varotto, Guenter Donn, Raul Pirona, David A. Henderson, Hans Hartings, Mario Motto
      Plant Cell Apr 2007, 19 (4) 1145-1162; DOI: https://doi.org/10.1105/tpc.106.042549

      The modulation of chromatin structure is mediated by enzymes such as histone acetyltransferases and deacetylases (HDACs). This functional characterization of a maize HDAC, HDA101, shows that it reversibly regulates histone acetylation, thus controlling gene and repeat activity, setting the histone code, and modulating developmental programs.

  4. Dudas, Brigitta

    1. You have accessRestricted Access
      An ERF Transcription Factor in Medicago truncatula That Is Essential for Nod Factor Signal Transduction
      Patrick H. Middleton, Júlia Jakab, R. Varma Penmetsa, Colby G. Starker, Jake Doll, Péter Kaló, Radhika Prabhu, John F. Marsh, Raka M. Mitra, Attila Kereszt, Brigitta Dudas, Kathryn VandenBosch, Sharon R. Long, Doug R. Cook, Gyorgy B. Kiss, Giles E.D. Oldroyd
      Plant Cell Apr 2007, 19 (4) 1221-1234; DOI: https://doi.org/10.1105/tpc.106.048264

      Legume/rhizobial symbiosis is a key player in the global nitrogen cycle by fixing atmospheric nitrogen. Recognition of bacteria by legumes requires the bacterial signaling molecule Nod factor, which induces early plant root responses in nodulation. This work identifies the transcription factor ERF Required for Nodulation as an important component of the Nod factor signal transduction pathway.

E

  1. Eastmond, Peter J.

    1. You have accessRestricted Access
      MONODEHYROASCORBATE REDUCTASE4 Is Required for Seed Storage Oil Hydrolysis and Postgerminative Growth in Arabidopsis
      Peter J. Eastmond
      Plant Cell Apr 2007, 19 (4) 1376-1387; DOI: https://doi.org/10.1105/tpc.106.043992

      This study reveals that a component of the peroxisomal membrane antioxidant system called MDAR4 is required for triacylglycerol breakdown and therefore postgerminative growth in the oilseed Arabidopsis. Evidence is presented to suggest that this system protects the oil body lipase SDP1 against hydrogen peroxide that is generated within the peroxisome as a by-product of fatty acid β-oxidation.

  2. Ebine, Kazuo

    1. You have accessRestricted Access
      The Arabidopsis AAA ATPase SKD1 Is Involved in Multivesicular Endosome Function and Interacts with Its Positive Regulator LYST-INTERACTING PROTEIN5
      Thomas J. Haas, Marek K. Sliwinski, Dana E. Martínez, Mary Preuss, Kazuo Ebine, Takashi Ueda, Erik Nielsen, Greg Odorizzi, Marisa S. Otegui
      Plant Cell Apr 2007, 19 (4) 1295-1312; DOI: https://doi.org/10.1105/tpc.106.049346

      Class E vacuolar protein sorting (VPS) proteins function in endosomal sorting of secretory and endocytic cargo. This work identifies an Arabidopsis homolog of the yeast and mammalian VPS4 protein, SUPPRESSOR OF K+ TRANSPORT GROWTH DEFECT1 (SKD1), which localizes to the cytoplasm and endosomes. In addition, LYST-INTERACTING PROTEIN5 is identified as a strong positive regulator of SKD1 ATPase activity.

  3. Eckardt, Nancy A.

    1. You have accessRestricted Access
      Thylakoid Development from Biogenesis to Senescence, and Ruminations on Regulation
      Nancy A. Eckardt
      Plant Cell Apr 2007, 19 (4) 1135-1138; DOI: https://doi.org/10.1105/tpc.107.052779
    2. You have accessRestricted Access
      G Protein γ Subunits Provide Functional Selectivity
      Nancy A. Eckardt
      Plant Cell Apr 2007, 19 (4) 1139a; DOI: https://doi.org/10.1105/tpc.107.190411
    3. You have accessRestricted Access
      Mitochondrial Recombination Surveillance
      Nancy A. Eckardt
      Plant Cell Apr 2007, 19 (4) 1139; DOI: https://doi.org/10.1105/tpc.107.190410

F

  1. Fan, Baofang

    1. You have accessRestricted Access
      Roles of Arabidopsis Cyclin-Dependent Kinase C Complexes in Cauliflower Mosaic Virus Infection, Plant Growth, and Development
      Xiaofeng Cui, Baofang Fan, James Scholz, Zhixiang Chen
      Plant Cell Apr 2007, 19 (4) 1388-1402; DOI: https://doi.org/10.1105/tpc.107.051375

      Arabidopsis cyclin-dependent kinase CDKC;2 and its cyclin T partner CYCT1;5 encode two interacting proteins that form a complex with an important role in cauliflower mosaic virus (CaMV) infection. This report establishes these CDKC kinase complexes as important host targets of CaMV for transcriptional activation of viral genes and critical regulators of plant growth and development.

  2. Fujimoto, Masaru

    1. You have accessRestricted Access
      Rice NON-YELLOW COLORING1 Is Involved in Light-Harvesting Complex II and Grana Degradation during Leaf Senescence
      Makoto Kusaba, Hisashi Ito, Ryouhei Morita, Shuichi Iida, Yutaka Sato, Masaru Fujimoto, Shinji Kawasaki, Ryouichi Tanaka, Hirohiko Hirochika, Minoru Nishimura, Ayumi Tanaka
      Plant Cell Apr 2007, 19 (4) 1362-1375; DOI: https://doi.org/10.1105/tpc.106.042911

      Leaf senescence involves degradation of photosynthetic pigments, proteins, and chloroplasts. This work finds that defects in a possible chlorophyll b reductase, the first enzyme in chlorophyll b degradation, inhibit LHCII and grana degradation in leaf senescence and result in a stay-green phenotype, suggesting that chlorophyll b degradation might be an important regulatory point in leaf senescence.

G

  1. Ghosh, Soumya

    1. You have accessRestricted Access
      The DELLA Domain of GA INSENSITIVE Mediates the Interaction with the GA INSENSITIVE DWARF1A Gibberellin Receptor of Arabidopsis
      Björn C. Willige, Soumya Ghosh, Carola Nill, Melina Zourelidou, Esther M.N. Dohmann, Andreas Maier, Claus Schwechheimer
      Plant Cell Apr 2007, 19 (4) 1209-1220; DOI: https://doi.org/10.1105/tpc.107.051441

      Gibberellic acid (GA) responses are repressed by proteins with a DELLA domain, which is essential for GA-dependent proteasomal degradation of the DELLA repressors. This work reveals that DELLA domain mutations described for a range of dwarfing alleles impair GA receptor interactions and that the DELLA domain of the repressor GIBBERELLIC ACID INSENSITIVE is sufficient for this interaction.

  2. Gopinath, Kodetham

    1. You have accessRestricted Access
      Replication-Independent Long-Distance Trafficking by Viral RNAs in Nicotiana benthamiana
      Kodetham Gopinath, C. Cheng Kao
      Plant Cell Apr 2007, 19 (4) 1179-1191; DOI: https://doi.org/10.1105/tpc.107.050088

      Systemic infection by viruses requires proper processing and transport of viral RNA throughout the plant. This work demonstrates that Brome mosaic virus RNA can traffic long distances through the phloem independent of replication. Viral movement protein and coat proteins may increase the efficiency of trafficking but are not essential for the trafficking event.

  3. Guo, Jinkui

    1. You have accessRestricted Access
      Formation of DEG5 and DEG8 Complexes and Their Involvement in the Degradation of Photodamaged Photosystem II Reaction Center D1 Protein in Arabidopsis
      Xuwu Sun, Lianwei Peng, Jinkui Guo, Wei Chi, Jinfang Ma, Congming Lu, Lixin Zhang
      Plant Cell Apr 2007, 19 (4) 1347-1361; DOI: https://doi.org/10.1105/tpc.106.049510

      The widely distributed DEGP proteases play important roles in the degradation of damaged and misfolded proteins. This report reveals that Arabidopsis DEG5 and DEG8 form a hexamer in the thylakoid lumen and are important for efficient turnover of the photosystem II D1 protein and for protection against photoinhibition in vivo.

  4. Guo, Yan

    1. Open Access
      SCABP8/CBL10, a Putative Calcium Sensor, Interacts with the Protein Kinase SOS2 to Protect Arabidopsis Shoots from Salt Stress
      Ruidang Quan, Huixin Lin, Imelda Mendoza, Yuguo Zhang, Wanhong Cao, Yongqing Yang, Mei Shang, Shouyi Chen, José M. Pardo, Yan Guo
      Plant Cell Apr 2007, 19 (4) 1415-1431; DOI: https://doi.org/10.1105/tpc.106.042291

      Functionally equivalent genes often display spatial and temporal differences in transcriptional regulation but may also have unique functions. As shown here, the similar calcium binding proteins SCABP8 and SOS3 protect shoot and root tissues, respectively, from salt stress by activating and recruiting the SOS2 kinase, but they also differ in additional regulatory mechanisms specific to each protein.

H

  1. Haas, Thomas J.

    1. You have accessRestricted Access
      The Arabidopsis AAA ATPase SKD1 Is Involved in Multivesicular Endosome Function and Interacts with Its Positive Regulator LYST-INTERACTING PROTEIN5
      Thomas J. Haas, Marek K. Sliwinski, Dana E. Martínez, Mary Preuss, Kazuo Ebine, Takashi Ueda, Erik Nielsen, Greg Odorizzi, Marisa S. Otegui
      Plant Cell Apr 2007, 19 (4) 1295-1312; DOI: https://doi.org/10.1105/tpc.106.049346

      Class E vacuolar protein sorting (VPS) proteins function in endosomal sorting of secretory and endocytic cargo. This work identifies an Arabidopsis homolog of the yeast and mammalian VPS4 protein, SUPPRESSOR OF K+ TRANSPORT GROWTH DEFECT1 (SKD1), which localizes to the cytoplasm and endosomes. In addition, LYST-INTERACTING PROTEIN5 is identified as a strong positive regulator of SKD1 ATPase activity.

  2. Hartings, Hans

    1. You have accessRestricted Access
      Maize Histone Deacetylase hda101 Is Involved in Plant Development, Gene Transcription, and Sequence-Specific Modulation of Histone Modification of Genes and Repeats
      Vincenzo Rossi, Sabrina Locatelli, Serena Varotto, Guenter Donn, Raul Pirona, David A. Henderson, Hans Hartings, Mario Motto
      Plant Cell Apr 2007, 19 (4) 1145-1162; DOI: https://doi.org/10.1105/tpc.106.042549

      The modulation of chromatin structure is mediated by enzymes such as histone acetyltransferases and deacetylases (HDACs). This functional characterization of a maize HDAC, HDA101, shows that it reversibly regulates histone acetylation, thus controlling gene and repeat activity, setting the histone code, and modulating developmental programs.

  3. Hasegawa, Paul M.

    1. Open Access
      SIZ1-Mediated Sumoylation of ICE1 Controls CBF3/DREB1A Expression and Freezing Tolerance in Arabidopsis
      Kenji Miura, Jing Bo Jin, Jiyoung Lee, Chan Yul Yoo, Vicki Stirm, Tomoko Miura, Edward N. Ashworth, Ray A. Bressan, Dae-Jin Yun, Paul M. Hasegawa
      Plant Cell Apr 2007, 19 (4) 1403-1414; DOI: https://doi.org/10.1105/tpc.106.048397

      Low temperatures initiate signaling pathways that control gene expression necessary for cold acclimation and chilling and freezing tolerances. This work establishes that SIZ1 is a regulator of cold acclimation through sumoylation of ICE1, which induces expression of CBF/DREB1 and its regulon and facilitates freezing tolerance.

  4. Henderson, David A.

    1. You have accessRestricted Access
      Maize Histone Deacetylase hda101 Is Involved in Plant Development, Gene Transcription, and Sequence-Specific Modulation of Histone Modification of Genes and Repeats
      Vincenzo Rossi, Sabrina Locatelli, Serena Varotto, Guenter Donn, Raul Pirona, David A. Henderson, Hans Hartings, Mario Motto
      Plant Cell Apr 2007, 19 (4) 1145-1162; DOI: https://doi.org/10.1105/tpc.106.042549

      The modulation of chromatin structure is mediated by enzymes such as histone acetyltransferases and deacetylases (HDACs). This functional characterization of a maize HDAC, HDA101, shows that it reversibly regulates histone acetylation, thus controlling gene and repeat activity, setting the histone code, and modulating developmental programs.

  5. Hirochika, Hirohiko

    1. You have accessRestricted Access
      Rice NON-YELLOW COLORING1 Is Involved in Light-Harvesting Complex II and Grana Degradation during Leaf Senescence
      Makoto Kusaba, Hisashi Ito, Ryouhei Morita, Shuichi Iida, Yutaka Sato, Masaru Fujimoto, Shinji Kawasaki, Ryouichi Tanaka, Hirohiko Hirochika, Minoru Nishimura, Ayumi Tanaka
      Plant Cell Apr 2007, 19 (4) 1362-1375; DOI: https://doi.org/10.1105/tpc.106.042911

      Leaf senescence involves degradation of photosynthetic pigments, proteins, and chloroplasts. This work finds that defects in a possible chlorophyll b reductase, the first enzyme in chlorophyll b degradation, inhibit LHCII and grana degradation in leaf senescence and result in a stay-green phenotype, suggesting that chlorophyll b degradation might be an important regulatory point in leaf senescence.

  6. Höfte, Herman

    1. You have accessRestricted Access
      The Transcription Factor WIN1/SHN1 Regulates Cutin Biosynthesis in Arabidopsis thaliana
      Rubini Kannangara, Caroline Branigan, Yan Liu, Teresa Penfield, Vijaya Rao, Grégory Mouille, Herman Höfte, Markus Pauly, José Luis Riechmann, Pierre Broun
      Plant Cell Apr 2007, 19 (4) 1278-1294; DOI: https://doi.org/10.1105/tpc.106.047076

      The protective role of a plant's cuticle in abiotic stress and biotic interactions depends on its permeability. These results suggest that the transcription factor WAX INDUCER1 controls cuticle formation by directly or collaboratively activating the transcription of cutin biosynthesis genes and modulates cuticle permeability through its influence on cutin composition.

  7. Hu, Jianhong

    1. You have accessRestricted Access
      PIL5, a Phytochrome-Interacting bHLH Protein, Regulates Gibberellin Responsiveness by Binding Directly to the GAI and RGA Promoters in Arabidopsis Seeds
      Eunkyoo Oh, Shinjiro Yamaguchi, Jianhong Hu, Jikumaru Yusuke, Byunghyuck Jung, Inyup Paik, Hee-Seung Lee, Tai-ping Sun, Yuji Kamiya, Giltsu Choi
      Plant Cell Apr 2007, 19 (4) 1192-1208; DOI: https://doi.org/10.1105/tpc.107.050153

      In plants, the proper decision to germinate is critical for plant survival. Light promotes seed germination by removing PIL5, a phytochrome-interacting light-labile bHLH transcription factor. It is shown here that PIL5 regulates gibberellin (GA) signaling genes by directly binding to their promoters and that PIL5-mediated light signaling regulates not only GA but also abscisic acid metabolism.

I

  1. Iida, Shuichi

    1. You have accessRestricted Access
      Rice NON-YELLOW COLORING1 Is Involved in Light-Harvesting Complex II and Grana Degradation during Leaf Senescence
      Makoto Kusaba, Hisashi Ito, Ryouhei Morita, Shuichi Iida, Yutaka Sato, Masaru Fujimoto, Shinji Kawasaki, Ryouichi Tanaka, Hirohiko Hirochika, Minoru Nishimura, Ayumi Tanaka
      Plant Cell Apr 2007, 19 (4) 1362-1375; DOI: https://doi.org/10.1105/tpc.106.042911

      Leaf senescence involves degradation of photosynthetic pigments, proteins, and chloroplasts. This work finds that defects in a possible chlorophyll b reductase, the first enzyme in chlorophyll b degradation, inhibit LHCII and grana degradation in leaf senescence and result in a stay-green phenotype, suggesting that chlorophyll b degradation might be an important regulatory point in leaf senescence.

  2. Ito, Hisashi

    1. You have accessRestricted Access
      Rice NON-YELLOW COLORING1 Is Involved in Light-Harvesting Complex II and Grana Degradation during Leaf Senescence
      Makoto Kusaba, Hisashi Ito, Ryouhei Morita, Shuichi Iida, Yutaka Sato, Masaru Fujimoto, Shinji Kawasaki, Ryouichi Tanaka, Hirohiko Hirochika, Minoru Nishimura, Ayumi Tanaka
      Plant Cell Apr 2007, 19 (4) 1362-1375; DOI: https://doi.org/10.1105/tpc.106.042911

      Leaf senescence involves degradation of photosynthetic pigments, proteins, and chloroplasts. This work finds that defects in a possible chlorophyll b reductase, the first enzyme in chlorophyll b degradation, inhibit LHCII and grana degradation in leaf senescence and result in a stay-green phenotype, suggesting that chlorophyll b degradation might be an important regulatory point in leaf senescence.

J

  1. Jakab, Júlia

    1. You have accessRestricted Access
      An ERF Transcription Factor in Medicago truncatula That Is Essential for Nod Factor Signal Transduction
      Patrick H. Middleton, Júlia Jakab, R. Varma Penmetsa, Colby G. Starker, Jake Doll, Péter Kaló, Radhika Prabhu, John F. Marsh, Raka M. Mitra, Attila Kereszt, Brigitta Dudas, Kathryn VandenBosch, Sharon R. Long, Doug R. Cook, Gyorgy B. Kiss, Giles E.D. Oldroyd
      Plant Cell Apr 2007, 19 (4) 1221-1234; DOI: https://doi.org/10.1105/tpc.106.048264

      Legume/rhizobial symbiosis is a key player in the global nitrogen cycle by fixing atmospheric nitrogen. Recognition of bacteria by legumes requires the bacterial signaling molecule Nod factor, which induces early plant root responses in nodulation. This work identifies the transcription factor ERF Required for Nodulation as an important component of the Nod factor signal transduction pathway.

  2. Jin, Jing Bo

    1. Open Access
      SIZ1-Mediated Sumoylation of ICE1 Controls CBF3/DREB1A Expression and Freezing Tolerance in Arabidopsis
      Kenji Miura, Jing Bo Jin, Jiyoung Lee, Chan Yul Yoo, Vicki Stirm, Tomoko Miura, Edward N. Ashworth, Ray A. Bressan, Dae-Jin Yun, Paul M. Hasegawa
      Plant Cell Apr 2007, 19 (4) 1403-1414; DOI: https://doi.org/10.1105/tpc.106.048397

      Low temperatures initiate signaling pathways that control gene expression necessary for cold acclimation and chilling and freezing tolerances. This work establishes that SIZ1 is a regulator of cold acclimation through sumoylation of ICE1, which induces expression of CBF/DREB1 and its regulon and facilitates freezing tolerance.

  3. Jones, Alan M.

    1. Open Access
      Heterotrimeric G Protein γ Subunits Provide Functional Selectivity in Gβγ Dimer Signaling in Arabidopsis
      Yuri Trusov, James Edward Rookes, Kimberley Tilbrook, David Chakravorty, Michael Glenn Mason, David Anderson, Jin-Gui Chen, Alan M. Jones, José Ramón Botella
      Plant Cell Apr 2007, 19 (4) 1235-1250; DOI: https://doi.org/10.1105/tpc.107.050096

      G proteins are important signaling molecules in plants and animal systems. This work provides evidence that plant heterotrimeric G proteins use both Gγ subunits to convey functional selectivity to the Gβγ dimers and reveals a mechanism underlying the complexity of G protein–mediated signaling in plants.

  4. Jung, Byunghyuck

    1. You have accessRestricted Access
      PIL5, a Phytochrome-Interacting bHLH Protein, Regulates Gibberellin Responsiveness by Binding Directly to the GAI and RGA Promoters in Arabidopsis Seeds
      Eunkyoo Oh, Shinjiro Yamaguchi, Jianhong Hu, Jikumaru Yusuke, Byunghyuck Jung, Inyup Paik, Hee-Seung Lee, Tai-ping Sun, Yuji Kamiya, Giltsu Choi
      Plant Cell Apr 2007, 19 (4) 1192-1208; DOI: https://doi.org/10.1105/tpc.107.050153

      In plants, the proper decision to germinate is critical for plant survival. Light promotes seed germination by removing PIL5, a phytochrome-interacting light-labile bHLH transcription factor. It is shown here that PIL5 regulates gibberellin (GA) signaling genes by directly binding to their promoters and that PIL5-mediated light signaling regulates not only GA but also abscisic acid metabolism.

K

  1. Kaló, Péter

    1. You have accessRestricted Access
      An ERF Transcription Factor in Medicago truncatula That Is Essential for Nod Factor Signal Transduction
      Patrick H. Middleton, Júlia Jakab, R. Varma Penmetsa, Colby G. Starker, Jake Doll, Péter Kaló, Radhika Prabhu, John F. Marsh, Raka M. Mitra, Attila Kereszt, Brigitta Dudas, Kathryn VandenBosch, Sharon R. Long, Doug R. Cook, Gyorgy B. Kiss, Giles E.D. Oldroyd
      Plant Cell Apr 2007, 19 (4) 1221-1234; DOI: https://doi.org/10.1105/tpc.106.048264

      Legume/rhizobial symbiosis is a key player in the global nitrogen cycle by fixing atmospheric nitrogen. Recognition of bacteria by legumes requires the bacterial signaling molecule Nod factor, which induces early plant root responses in nodulation. This work identifies the transcription factor ERF Required for Nodulation as an important component of the Nod factor signal transduction pathway.

  2. Kamiya, Yuji

    1. You have accessRestricted Access
      PIL5, a Phytochrome-Interacting bHLH Protein, Regulates Gibberellin Responsiveness by Binding Directly to the GAI and RGA Promoters in Arabidopsis Seeds
      Eunkyoo Oh, Shinjiro Yamaguchi, Jianhong Hu, Jikumaru Yusuke, Byunghyuck Jung, Inyup Paik, Hee-Seung Lee, Tai-ping Sun, Yuji Kamiya, Giltsu Choi
      Plant Cell Apr 2007, 19 (4) 1192-1208; DOI: https://doi.org/10.1105/tpc.107.050153

      In plants, the proper decision to germinate is critical for plant survival. Light promotes seed germination by removing PIL5, a phytochrome-interacting light-labile bHLH transcription factor. It is shown here that PIL5 regulates gibberellin (GA) signaling genes by directly binding to their promoters and that PIL5-mediated light signaling regulates not only GA but also abscisic acid metabolism.

  3. Kannangara, Rubini

    1. You have accessRestricted Access
      The Transcription Factor WIN1/SHN1 Regulates Cutin Biosynthesis in Arabidopsis thaliana
      Rubini Kannangara, Caroline Branigan, Yan Liu, Teresa Penfield, Vijaya Rao, Grégory Mouille, Herman Höfte, Markus Pauly, José Luis Riechmann, Pierre Broun
      Plant Cell Apr 2007, 19 (4) 1278-1294; DOI: https://doi.org/10.1105/tpc.106.047076

      The protective role of a plant's cuticle in abiotic stress and biotic interactions depends on its permeability. These results suggest that the transcription factor WAX INDUCER1 controls cuticle formation by directly or collaboratively activating the transcription of cutin biosynthesis genes and modulates cuticle permeability through its influence on cutin composition.

  4. Kao, C. Cheng

    1. You have accessRestricted Access
      Replication-Independent Long-Distance Trafficking by Viral RNAs in Nicotiana benthamiana
      Kodetham Gopinath, C. Cheng Kao
      Plant Cell Apr 2007, 19 (4) 1179-1191; DOI: https://doi.org/10.1105/tpc.107.050088

      Systemic infection by viruses requires proper processing and transport of viral RNA throughout the plant. This work demonstrates that Brome mosaic virus RNA can traffic long distances through the phloem independent of replication. Viral movement protein and coat proteins may increase the efficiency of trafficking but are not essential for the trafficking event.

  5. Kato, Yusuke

    1. You have accessRestricted Access
      The Balance between Protein Synthesis and Degradation in Chloroplasts Determines Leaf Variegation in Arabidopsis yellow variegated Mutants
      Eiko Miura, Yusuke Kato, Ryo Matsushima, Verónica Albrecht, Soumaya Laalami, Wataru Sakamoto
      Plant Cell Apr 2007, 19 (4) 1313-1328; DOI: https://doi.org/10.1105/tpc.106.049270

      Leaf variegation has long been recognized as a genetic trait, but the question remains as to why and how green and white sectors are formed in the same leaf in a uniform genetic background. In this work, identification of trans-acting mutations that suppress leaf variegation in an Arabidopsis mutant demonstrates a mechanism for variegation associated with chloroplast activities.

  6. Kawasaki, Shinji

    1. You have accessRestricted Access
      Rice NON-YELLOW COLORING1 Is Involved in Light-Harvesting Complex II and Grana Degradation during Leaf Senescence
      Makoto Kusaba, Hisashi Ito, Ryouhei Morita, Shuichi Iida, Yutaka Sato, Masaru Fujimoto, Shinji Kawasaki, Ryouichi Tanaka, Hirohiko Hirochika, Minoru Nishimura, Ayumi Tanaka
      Plant Cell Apr 2007, 19 (4) 1362-1375; DOI: https://doi.org/10.1105/tpc.106.042911

      Leaf senescence involves degradation of photosynthetic pigments, proteins, and chloroplasts. This work finds that defects in a possible chlorophyll b reductase, the first enzyme in chlorophyll b degradation, inhibit LHCII and grana degradation in leaf senescence and result in a stay-green phenotype, suggesting that chlorophyll b degradation might be an important regulatory point in leaf senescence.

  7. Kereszt, Attila

    1. You have accessRestricted Access
      An ERF Transcription Factor in Medicago truncatula That Is Essential for Nod Factor Signal Transduction
      Patrick H. Middleton, Júlia Jakab, R. Varma Penmetsa, Colby G. Starker, Jake Doll, Péter Kaló, Radhika Prabhu, John F. Marsh, Raka M. Mitra, Attila Kereszt, Brigitta Dudas, Kathryn VandenBosch, Sharon R. Long, Doug R. Cook, Gyorgy B. Kiss, Giles E.D. Oldroyd
      Plant Cell Apr 2007, 19 (4) 1221-1234; DOI: https://doi.org/10.1105/tpc.106.048264

      Legume/rhizobial symbiosis is a key player in the global nitrogen cycle by fixing atmospheric nitrogen. Recognition of bacteria by legumes requires the bacterial signaling molecule Nod factor, which induces early plant root responses in nodulation. This work identifies the transcription factor ERF Required for Nodulation as an important component of the Nod factor signal transduction pathway.

  8. Kiss, Gyorgy B.

    1. You have accessRestricted Access
      An ERF Transcription Factor in Medicago truncatula That Is Essential for Nod Factor Signal Transduction
      Patrick H. Middleton, Júlia Jakab, R. Varma Penmetsa, Colby G. Starker, Jake Doll, Péter Kaló, Radhika Prabhu, John F. Marsh, Raka M. Mitra, Attila Kereszt, Brigitta Dudas, Kathryn VandenBosch, Sharon R. Long, Doug R. Cook, Gyorgy B. Kiss, Giles E.D. Oldroyd
      Plant Cell Apr 2007, 19 (4) 1221-1234; DOI: https://doi.org/10.1105/tpc.106.048264

      Legume/rhizobial symbiosis is a key player in the global nitrogen cycle by fixing atmospheric nitrogen. Recognition of bacteria by legumes requires the bacterial signaling molecule Nod factor, which induces early plant root responses in nodulation. This work identifies the transcription factor ERF Required for Nodulation as an important component of the Nod factor signal transduction pathway.

  9. Knierer, Stephan

    1. You have accessRestricted Access
      Characterization of the VIER F-BOX PROTEINE Genes from Arabidopsis Reveals Their Importance for Plant Growth and Development
      Katja M. Schwager, Luz Irina A. Calderon-Villalobos, Esther M.N. Dohmann, Björn C. Willige, Stephan Knierer, Carola Nill, Claus Schwechheimer
      Plant Cell Apr 2007, 19 (4) 1163-1178; DOI: https://doi.org/10.1105/tpc.105.040675

      E3 ubiquitin ligases target proteins for ubiquitin proteasome–mediated degradation, with substrate specificity conferred by F-box protein subunits. Plants have apparently recruited F-box proteins of the C subfamily to regulate phytohormone responses, axillary branching, and senescence, and this study suggests that VIER F-BOX PROTEINE family members function in lateral root formation and plant growth.

  10. Kono, Atsushi

    1. You have accessRestricted Access
      The Arabidopsis D-Type Cyclin CYCD4 Controls Cell Division in the Stomatal Lineage of the Hypocotyl Epidermis
      Atsushi Kono, Chikage Umeda-Hara, Sumiko Adachi, Noriko Nagata, Mami Konomi, Tsuyoshi Nakagawa, Hirofumi Uchimiya, Masaaki Umeda
      Plant Cell Apr 2007, 19 (4) 1265-1277; DOI: https://doi.org/10.1105/tpc.106.046763

      D-type cyclins play an essential role in cell cycle progression in response to external signals. This study demonstrates a specific requirement of cyclin D in cell divisions associated with stomatal precursor formation in the hypocotyl.

  11. Konomi, Mami

    1. You have accessRestricted Access
      The Arabidopsis D-Type Cyclin CYCD4 Controls Cell Division in the Stomatal Lineage of the Hypocotyl Epidermis
      Atsushi Kono, Chikage Umeda-Hara, Sumiko Adachi, Noriko Nagata, Mami Konomi, Tsuyoshi Nakagawa, Hirofumi Uchimiya, Masaaki Umeda
      Plant Cell Apr 2007, 19 (4) 1265-1277; DOI: https://doi.org/10.1105/tpc.106.046763

      D-type cyclins play an essential role in cell cycle progression in response to external signals. This study demonstrates a specific requirement of cyclin D in cell divisions associated with stomatal precursor formation in the hypocotyl.

  12. Kusaba, Makoto

    1. You have accessRestricted Access
      Rice NON-YELLOW COLORING1 Is Involved in Light-Harvesting Complex II and Grana Degradation during Leaf Senescence
      Makoto Kusaba, Hisashi Ito, Ryouhei Morita, Shuichi Iida, Yutaka Sato, Masaru Fujimoto, Shinji Kawasaki, Ryouichi Tanaka, Hirohiko Hirochika, Minoru Nishimura, Ayumi Tanaka
      Plant Cell Apr 2007, 19 (4) 1362-1375; DOI: https://doi.org/10.1105/tpc.106.042911

      Leaf senescence involves degradation of photosynthetic pigments, proteins, and chloroplasts. This work finds that defects in a possible chlorophyll b reductase, the first enzyme in chlorophyll b degradation, inhibit LHCII and grana degradation in leaf senescence and result in a stay-green phenotype, suggesting that chlorophyll b degradation might be an important regulatory point in leaf senescence.

L

  1. Laalami, Soumaya

    1. You have accessRestricted Access
      The Balance between Protein Synthesis and Degradation in Chloroplasts Determines Leaf Variegation in Arabidopsis yellow variegated Mutants
      Eiko Miura, Yusuke Kato, Ryo Matsushima, Verónica Albrecht, Soumaya Laalami, Wataru Sakamoto
      Plant Cell Apr 2007, 19 (4) 1313-1328; DOI: https://doi.org/10.1105/tpc.106.049270

      Leaf variegation has long been recognized as a genetic trait, but the question remains as to why and how green and white sectors are formed in the same leaf in a uniform genetic background. In this work, identification of trans-acting mutations that suppress leaf variegation in an Arabidopsis mutant demonstrates a mechanism for variegation associated with chloroplast activities.

  2. Lee, Hee-Seung

    1. You have accessRestricted Access
      PIL5, a Phytochrome-Interacting bHLH Protein, Regulates Gibberellin Responsiveness by Binding Directly to the GAI and RGA Promoters in Arabidopsis Seeds
      Eunkyoo Oh, Shinjiro Yamaguchi, Jianhong Hu, Jikumaru Yusuke, Byunghyuck Jung, Inyup Paik, Hee-Seung Lee, Tai-ping Sun, Yuji Kamiya, Giltsu Choi
      Plant Cell Apr 2007, 19 (4) 1192-1208; DOI: https://doi.org/10.1105/tpc.107.050153

      In plants, the proper decision to germinate is critical for plant survival. Light promotes seed germination by removing PIL5, a phytochrome-interacting light-labile bHLH transcription factor. It is shown here that PIL5 regulates gibberellin (GA) signaling genes by directly binding to their promoters and that PIL5-mediated light signaling regulates not only GA but also abscisic acid metabolism.

  3. Lee, Jiyoung

    1. Open Access
      SIZ1-Mediated Sumoylation of ICE1 Controls CBF3/DREB1A Expression and Freezing Tolerance in Arabidopsis
      Kenji Miura, Jing Bo Jin, Jiyoung Lee, Chan Yul Yoo, Vicki Stirm, Tomoko Miura, Edward N. Ashworth, Ray A. Bressan, Dae-Jin Yun, Paul M. Hasegawa
      Plant Cell Apr 2007, 19 (4) 1403-1414; DOI: https://doi.org/10.1105/tpc.106.048397

      Low temperatures initiate signaling pathways that control gene expression necessary for cold acclimation and chilling and freezing tolerances. This work establishes that SIZ1 is a regulator of cold acclimation through sumoylation of ICE1, which induces expression of CBF/DREB1 and its regulon and facilitates freezing tolerance.

  4. Lin, Huixin

    1. Open Access
      SCABP8/CBL10, a Putative Calcium Sensor, Interacts with the Protein Kinase SOS2 to Protect Arabidopsis Shoots from Salt Stress
      Ruidang Quan, Huixin Lin, Imelda Mendoza, Yuguo Zhang, Wanhong Cao, Yongqing Yang, Mei Shang, Shouyi Chen, José M. Pardo, Yan Guo
      Plant Cell Apr 2007, 19 (4) 1415-1431; DOI: https://doi.org/10.1105/tpc.106.042291

      Functionally equivalent genes often display spatial and temporal differences in transcriptional regulation but may also have unique functions. As shown here, the similar calcium binding proteins SCABP8 and SOS3 protect shoot and root tissues, respectively, from salt stress by activating and recruiting the SOS2 kinase, but they also differ in additional regulatory mechanisms specific to each protein.

  5. Liu, Yan

    1. You have accessRestricted Access
      The Transcription Factor WIN1/SHN1 Regulates Cutin Biosynthesis in Arabidopsis thaliana
      Rubini Kannangara, Caroline Branigan, Yan Liu, Teresa Penfield, Vijaya Rao, Grégory Mouille, Herman Höfte, Markus Pauly, José Luis Riechmann, Pierre Broun
      Plant Cell Apr 2007, 19 (4) 1278-1294; DOI: https://doi.org/10.1105/tpc.106.047076

      The protective role of a plant's cuticle in abiotic stress and biotic interactions depends on its permeability. These results suggest that the transcription factor WAX INDUCER1 controls cuticle formation by directly or collaboratively activating the transcription of cutin biosynthesis genes and modulates cuticle permeability through its influence on cutin composition.

  6. Locatelli, Sabrina

    1. You have accessRestricted Access
      Maize Histone Deacetylase hda101 Is Involved in Plant Development, Gene Transcription, and Sequence-Specific Modulation of Histone Modification of Genes and Repeats
      Vincenzo Rossi, Sabrina Locatelli, Serena Varotto, Guenter Donn, Raul Pirona, David A. Henderson, Hans Hartings, Mario Motto
      Plant Cell Apr 2007, 19 (4) 1145-1162; DOI: https://doi.org/10.1105/tpc.106.042549

      The modulation of chromatin structure is mediated by enzymes such as histone acetyltransferases and deacetylases (HDACs). This functional characterization of a maize HDAC, HDA101, shows that it reversibly regulates histone acetylation, thus controlling gene and repeat activity, setting the histone code, and modulating developmental programs.

  7. Long, Sharon R.

    1. You have accessRestricted Access
      An ERF Transcription Factor in Medicago truncatula That Is Essential for Nod Factor Signal Transduction
      Patrick H. Middleton, Júlia Jakab, R. Varma Penmetsa, Colby G. Starker, Jake Doll, Péter Kaló, Radhika Prabhu, John F. Marsh, Raka M. Mitra, Attila Kereszt, Brigitta Dudas, Kathryn VandenBosch, Sharon R. Long, Doug R. Cook, Gyorgy B. Kiss, Giles E.D. Oldroyd
      Plant Cell Apr 2007, 19 (4) 1221-1234; DOI: https://doi.org/10.1105/tpc.106.048264

      Legume/rhizobial symbiosis is a key player in the global nitrogen cycle by fixing atmospheric nitrogen. Recognition of bacteria by legumes requires the bacterial signaling molecule Nod factor, which induces early plant root responses in nodulation. This work identifies the transcription factor ERF Required for Nodulation as an important component of the Nod factor signal transduction pathway.

  8. Lu, Congming

    1. You have accessRestricted Access
      Formation of DEG5 and DEG8 Complexes and Their Involvement in the Degradation of Photodamaged Photosystem II Reaction Center D1 Protein in Arabidopsis
      Xuwu Sun, Lianwei Peng, Jinkui Guo, Wei Chi, Jinfang Ma, Congming Lu, Lixin Zhang
      Plant Cell Apr 2007, 19 (4) 1347-1361; DOI: https://doi.org/10.1105/tpc.106.049510

      The widely distributed DEGP proteases play important roles in the degradation of damaged and misfolded proteins. This report reveals that Arabidopsis DEG5 and DEG8 form a hexamer in the thylakoid lumen and are important for efficient turnover of the photosystem II D1 protein and for protection against photoinhibition in vivo.

M

  1. Ma, Jinfang

    1. You have accessRestricted Access
      Formation of DEG5 and DEG8 Complexes and Their Involvement in the Degradation of Photodamaged Photosystem II Reaction Center D1 Protein in Arabidopsis
      Xuwu Sun, Lianwei Peng, Jinkui Guo, Wei Chi, Jinfang Ma, Congming Lu, Lixin Zhang
      Plant Cell Apr 2007, 19 (4) 1347-1361; DOI: https://doi.org/10.1105/tpc.106.049510

      The widely distributed DEGP proteases play important roles in the degradation of damaged and misfolded proteins. This report reveals that Arabidopsis DEG5 and DEG8 form a hexamer in the thylakoid lumen and are important for efficient turnover of the photosystem II D1 protein and for protection against photoinhibition in vivo.

  2. Mackenzie, Sally A.

    1. Open Access
      Plant Mitochondrial Recombination Surveillance Requires Unusual RecA and MutS Homologs
      Vikas Shedge, Maria Arrieta-Montiel, Alan C. Christensen, Sally A. Mackenzie
      Plant Cell Apr 2007, 19 (4) 1251-1264; DOI: https://doi.org/10.1105/tpc.106.048355

      Substoichiometric shifting (SSS) is the amplification or suppression of subgenomic molecules in plant mitochondrial genomes. This report describes two nuclear genes, MSH1 and RECA3, that regulate SSS in Arabidopsis by controlling illegitimate recombination and presents the cellular and developmental implications of msh1 and recA3 mutant-associated mitochondrial genome instability in plants.

  3. Maier, Andreas

    1. You have accessRestricted Access
      The DELLA Domain of GA INSENSITIVE Mediates the Interaction with the GA INSENSITIVE DWARF1A Gibberellin Receptor of Arabidopsis
      Björn C. Willige, Soumya Ghosh, Carola Nill, Melina Zourelidou, Esther M.N. Dohmann, Andreas Maier, Claus Schwechheimer
      Plant Cell Apr 2007, 19 (4) 1209-1220; DOI: https://doi.org/10.1105/tpc.107.051441

      Gibberellic acid (GA) responses are repressed by proteins with a DELLA domain, which is essential for GA-dependent proteasomal degradation of the DELLA repressors. This work reveals that DELLA domain mutations described for a range of dwarfing alleles impair GA receptor interactions and that the DELLA domain of the repressor GIBBERELLIC ACID INSENSITIVE is sufficient for this interaction.

  4. Marsh, John F.

    1. You have accessRestricted Access
      An ERF Transcription Factor in Medicago truncatula That Is Essential for Nod Factor Signal Transduction
      Patrick H. Middleton, Júlia Jakab, R. Varma Penmetsa, Colby G. Starker, Jake Doll, Péter Kaló, Radhika Prabhu, John F. Marsh, Raka M. Mitra, Attila Kereszt, Brigitta Dudas, Kathryn VandenBosch, Sharon R. Long, Doug R. Cook, Gyorgy B. Kiss, Giles E.D. Oldroyd
      Plant Cell Apr 2007, 19 (4) 1221-1234; DOI: https://doi.org/10.1105/tpc.106.048264

      Legume/rhizobial symbiosis is a key player in the global nitrogen cycle by fixing atmospheric nitrogen. Recognition of bacteria by legumes requires the bacterial signaling molecule Nod factor, which induces early plant root responses in nodulation. This work identifies the transcription factor ERF Required for Nodulation as an important component of the Nod factor signal transduction pathway.

  5. Martínez, Dana E.

    1. You have accessRestricted Access
      The Arabidopsis AAA ATPase SKD1 Is Involved in Multivesicular Endosome Function and Interacts with Its Positive Regulator LYST-INTERACTING PROTEIN5
      Thomas J. Haas, Marek K. Sliwinski, Dana E. Martínez, Mary Preuss, Kazuo Ebine, Takashi Ueda, Erik Nielsen, Greg Odorizzi, Marisa S. Otegui
      Plant Cell Apr 2007, 19 (4) 1295-1312; DOI: https://doi.org/10.1105/tpc.106.049346

      Class E vacuolar protein sorting (VPS) proteins function in endosomal sorting of secretory and endocytic cargo. This work identifies an Arabidopsis homolog of the yeast and mammalian VPS4 protein, SUPPRESSOR OF K+ TRANSPORT GROWTH DEFECT1 (SKD1), which localizes to the cytoplasm and endosomes. In addition, LYST-INTERACTING PROTEIN5 is identified as a strong positive regulator of SKD1 ATPase activity.

  6. Mason, Michael Glenn

    1. Open Access
      Heterotrimeric G Protein γ Subunits Provide Functional Selectivity in Gβγ Dimer Signaling in Arabidopsis
      Yuri Trusov, James Edward Rookes, Kimberley Tilbrook, David Chakravorty, Michael Glenn Mason, David Anderson, Jin-Gui Chen, Alan M. Jones, José Ramón Botella
      Plant Cell Apr 2007, 19 (4) 1235-1250; DOI: https://doi.org/10.1105/tpc.107.050096

      G proteins are important signaling molecules in plants and animal systems. This work provides evidence that plant heterotrimeric G proteins use both Gγ subunits to convey functional selectivity to the Gβγ dimers and reveals a mechanism underlying the complexity of G protein–mediated signaling in plants.

  7. Matsushima, Ryo

    1. You have accessRestricted Access
      The Balance between Protein Synthesis and Degradation in Chloroplasts Determines Leaf Variegation in Arabidopsis yellow variegated Mutants
      Eiko Miura, Yusuke Kato, Ryo Matsushima, Verónica Albrecht, Soumaya Laalami, Wataru Sakamoto
      Plant Cell Apr 2007, 19 (4) 1313-1328; DOI: https://doi.org/10.1105/tpc.106.049270

      Leaf variegation has long been recognized as a genetic trait, but the question remains as to why and how green and white sectors are formed in the same leaf in a uniform genetic background. In this work, identification of trans-acting mutations that suppress leaf variegation in an Arabidopsis mutant demonstrates a mechanism for variegation associated with chloroplast activities.

  8. Meierhoff, Karin

    1. You have accessRestricted Access
      The Nuclear-Encoded Factor HCF173 Is Involved in the Initiation of Translation of the psbA mRNA in Arabidopsis thaliana
      Kerstin Schult, Karin Meierhoff, Susanne Paradies, Thomas Töller, Petra Wolff, Peter Westhoff
      Plant Cell Apr 2007, 19 (4) 1329-1346; DOI: https://doi.org/10.1105/tpc.106.042895

      Photosystem II is a genetic mosaic consisting of plastid- and nuclear-encoded subunits requiring coordinated gene expression in both compartments. This work finds that the nuclear-encoded factor HIGH CHLOROPHYLL FLUORESCENCE 173 is essential for photosystem II biogenesis. Lack of the protein results in drastically reduced D1 synthesis due to decreased translation of the psbA mRNA.

  9. Mendoza, Imelda

    1. Open Access
      SCABP8/CBL10, a Putative Calcium Sensor, Interacts with the Protein Kinase SOS2 to Protect Arabidopsis Shoots from Salt Stress
      Ruidang Quan, Huixin Lin, Imelda Mendoza, Yuguo Zhang, Wanhong Cao, Yongqing Yang, Mei Shang, Shouyi Chen, José M. Pardo, Yan Guo
      Plant Cell Apr 2007, 19 (4) 1415-1431; DOI: https://doi.org/10.1105/tpc.106.042291

      Functionally equivalent genes often display spatial and temporal differences in transcriptional regulation but may also have unique functions. As shown here, the similar calcium binding proteins SCABP8 and SOS3 protect shoot and root tissues, respectively, from salt stress by activating and recruiting the SOS2 kinase, but they also differ in additional regulatory mechanisms specific to each protein.

  10. Middleton, Patrick H.

    1. You have accessRestricted Access
      An ERF Transcription Factor in Medicago truncatula That Is Essential for Nod Factor Signal Transduction
      Patrick H. Middleton, Júlia Jakab, R. Varma Penmetsa, Colby G. Starker, Jake Doll, Péter Kaló, Radhika Prabhu, John F. Marsh, Raka M. Mitra, Attila Kereszt, Brigitta Dudas, Kathryn VandenBosch, Sharon R. Long, Doug R. Cook, Gyorgy B. Kiss, Giles E.D. Oldroyd
      Plant Cell Apr 2007, 19 (4) 1221-1234; DOI: https://doi.org/10.1105/tpc.106.048264

      Legume/rhizobial symbiosis is a key player in the global nitrogen cycle by fixing atmospheric nitrogen. Recognition of bacteria by legumes requires the bacterial signaling molecule Nod factor, which induces early plant root responses in nodulation. This work identifies the transcription factor ERF Required for Nodulation as an important component of the Nod factor signal transduction pathway.

  11. Mitra, Raka M.

    1. You have accessRestricted Access
      An ERF Transcription Factor in Medicago truncatula That Is Essential for Nod Factor Signal Transduction
      Patrick H. Middleton, Júlia Jakab, R. Varma Penmetsa, Colby G. Starker, Jake Doll, Péter Kaló, Radhika Prabhu, John F. Marsh, Raka M. Mitra, Attila Kereszt, Brigitta Dudas, Kathryn VandenBosch, Sharon R. Long, Doug R. Cook, Gyorgy B. Kiss, Giles E.D. Oldroyd
      Plant Cell Apr 2007, 19 (4) 1221-1234; DOI: https://doi.org/10.1105/tpc.106.048264

      Legume/rhizobial symbiosis is a key player in the global nitrogen cycle by fixing atmospheric nitrogen. Recognition of bacteria by legumes requires the bacterial signaling molecule Nod factor, which induces early plant root responses in nodulation. This work identifies the transcription factor ERF Required for Nodulation as an important component of the Nod factor signal transduction pathway.

  12. Miura, Eiko

    1. You have accessRestricted Access
      The Balance between Protein Synthesis and Degradation in Chloroplasts Determines Leaf Variegation in Arabidopsis yellow variegated Mutants
      Eiko Miura, Yusuke Kato, Ryo Matsushima, Verónica Albrecht, Soumaya Laalami, Wataru Sakamoto
      Plant Cell Apr 2007, 19 (4) 1313-1328; DOI: https://doi.org/10.1105/tpc.106.049270

      Leaf variegation has long been recognized as a genetic trait, but the question remains as to why and how green and white sectors are formed in the same leaf in a uniform genetic background. In this work, identification of trans-acting mutations that suppress leaf variegation in an Arabidopsis mutant demonstrates a mechanism for variegation associated with chloroplast activities.

  13. Miura, Kenji

    1. Open Access
      SIZ1-Mediated Sumoylation of ICE1 Controls CBF3/DREB1A Expression and Freezing Tolerance in Arabidopsis
      Kenji Miura, Jing Bo Jin, Jiyoung Lee, Chan Yul Yoo, Vicki Stirm, Tomoko Miura, Edward N. Ashworth, Ray A. Bressan, Dae-Jin Yun, Paul M. Hasegawa
      Plant Cell Apr 2007, 19 (4) 1403-1414; DOI: https://doi.org/10.1105/tpc.106.048397

      Low temperatures initiate signaling pathways that control gene expression necessary for cold acclimation and chilling and freezing tolerances. This work establishes that SIZ1 is a regulator of cold acclimation through sumoylation of ICE1, which induces expression of CBF/DREB1 and its regulon and facilitates freezing tolerance.

  14. Miura, Tomoko

    1. Open Access
      SIZ1-Mediated Sumoylation of ICE1 Controls CBF3/DREB1A Expression and Freezing Tolerance in Arabidopsis
      Kenji Miura, Jing Bo Jin, Jiyoung Lee, Chan Yul Yoo, Vicki Stirm, Tomoko Miura, Edward N. Ashworth, Ray A. Bressan, Dae-Jin Yun, Paul M. Hasegawa
      Plant Cell Apr 2007, 19 (4) 1403-1414; DOI: https://doi.org/10.1105/tpc.106.048397

      Low temperatures initiate signaling pathways that control gene expression necessary for cold acclimation and chilling and freezing tolerances. This work establishes that SIZ1 is a regulator of cold acclimation through sumoylation of ICE1, which induces expression of CBF/DREB1 and its regulon and facilitates freezing tolerance.

  15. Morita, Ryouhei

    1. You have accessRestricted Access
      Rice NON-YELLOW COLORING1 Is Involved in Light-Harvesting Complex II and Grana Degradation during Leaf Senescence
      Makoto Kusaba, Hisashi Ito, Ryouhei Morita, Shuichi Iida, Yutaka Sato, Masaru Fujimoto, Shinji Kawasaki, Ryouichi Tanaka, Hirohiko Hirochika, Minoru Nishimura, Ayumi Tanaka
      Plant Cell Apr 2007, 19 (4) 1362-1375; DOI: https://doi.org/10.1105/tpc.106.042911

      Leaf senescence involves degradation of photosynthetic pigments, proteins, and chloroplasts. This work finds that defects in a possible chlorophyll b reductase, the first enzyme in chlorophyll b degradation, inhibit LHCII and grana degradation in leaf senescence and result in a stay-green phenotype, suggesting that chlorophyll b degradation might be an important regulatory point in leaf senescence.

  16. Motto, Mario

    1. You have accessRestricted Access
      Maize Histone Deacetylase hda101 Is Involved in Plant Development, Gene Transcription, and Sequence-Specific Modulation of Histone Modification of Genes and Repeats
      Vincenzo Rossi, Sabrina Locatelli, Serena Varotto, Guenter Donn, Raul Pirona, David A. Henderson, Hans Hartings, Mario Motto
      Plant Cell Apr 2007, 19 (4) 1145-1162; DOI: https://doi.org/10.1105/tpc.106.042549

      The modulation of chromatin structure is mediated by enzymes such as histone acetyltransferases and deacetylases (HDACs). This functional characterization of a maize HDAC, HDA101, shows that it reversibly regulates histone acetylation, thus controlling gene and repeat activity, setting the histone code, and modulating developmental programs.

  17. Mouille, Grégory

    1. You have accessRestricted Access
      The Transcription Factor WIN1/SHN1 Regulates Cutin Biosynthesis in Arabidopsis thaliana
      Rubini Kannangara, Caroline Branigan, Yan Liu, Teresa Penfield, Vijaya Rao, Grégory Mouille, Herman Höfte, Markus Pauly, José Luis Riechmann, Pierre Broun
      Plant Cell Apr 2007, 19 (4) 1278-1294; DOI: https://doi.org/10.1105/tpc.106.047076

      The protective role of a plant's cuticle in abiotic stress and biotic interactions depends on its permeability. These results suggest that the transcription factor WAX INDUCER1 controls cuticle formation by directly or collaboratively activating the transcription of cutin biosynthesis genes and modulates cuticle permeability through its influence on cutin composition.

N

  1. Nagata, Noriko

    1. You have accessRestricted Access
      The Arabidopsis D-Type Cyclin CYCD4 Controls Cell Division in the Stomatal Lineage of the Hypocotyl Epidermis
      Atsushi Kono, Chikage Umeda-Hara, Sumiko Adachi, Noriko Nagata, Mami Konomi, Tsuyoshi Nakagawa, Hirofumi Uchimiya, Masaaki Umeda
      Plant Cell Apr 2007, 19 (4) 1265-1277; DOI: https://doi.org/10.1105/tpc.106.046763

      D-type cyclins play an essential role in cell cycle progression in response to external signals. This study demonstrates a specific requirement of cyclin D in cell divisions associated with stomatal precursor formation in the hypocotyl.

  2. Nakagawa, Tsuyoshi

    1. You have accessRestricted Access
      The Arabidopsis D-Type Cyclin CYCD4 Controls Cell Division in the Stomatal Lineage of the Hypocotyl Epidermis
      Atsushi Kono, Chikage Umeda-Hara, Sumiko Adachi, Noriko Nagata, Mami Konomi, Tsuyoshi Nakagawa, Hirofumi Uchimiya, Masaaki Umeda
      Plant Cell Apr 2007, 19 (4) 1265-1277; DOI: https://doi.org/10.1105/tpc.106.046763

      D-type cyclins play an essential role in cell cycle progression in response to external signals. This study demonstrates a specific requirement of cyclin D in cell divisions associated with stomatal precursor formation in the hypocotyl.

  3. Nielsen, Erik

    1. You have accessRestricted Access
      The Arabidopsis AAA ATPase SKD1 Is Involved in Multivesicular Endosome Function and Interacts with Its Positive Regulator LYST-INTERACTING PROTEIN5
      Thomas J. Haas, Marek K. Sliwinski, Dana E. Martínez, Mary Preuss, Kazuo Ebine, Takashi Ueda, Erik Nielsen, Greg Odorizzi, Marisa S. Otegui
      Plant Cell Apr 2007, 19 (4) 1295-1312; DOI: https://doi.org/10.1105/tpc.106.049346

      Class E vacuolar protein sorting (VPS) proteins function in endosomal sorting of secretory and endocytic cargo. This work identifies an Arabidopsis homolog of the yeast and mammalian VPS4 protein, SUPPRESSOR OF K+ TRANSPORT GROWTH DEFECT1 (SKD1), which localizes to the cytoplasm and endosomes. In addition, LYST-INTERACTING PROTEIN5 is identified as a strong positive regulator of SKD1 ATPase activity.

  4. Nill, Carola

    1. You have accessRestricted Access
      Characterization of the VIER F-BOX PROTEINE Genes from Arabidopsis Reveals Their Importance for Plant Growth and Development
      Katja M. Schwager, Luz Irina A. Calderon-Villalobos, Esther M.N. Dohmann, Björn C. Willige, Stephan Knierer, Carola Nill, Claus Schwechheimer
      Plant Cell Apr 2007, 19 (4) 1163-1178; DOI: https://doi.org/10.1105/tpc.105.040675

      E3 ubiquitin ligases target proteins for ubiquitin proteasome–mediated degradation, with substrate specificity conferred by F-box protein subunits. Plants have apparently recruited F-box proteins of the C subfamily to regulate phytohormone responses, axillary branching, and senescence, and this study suggests that VIER F-BOX PROTEINE family members function in lateral root formation and plant growth.

    2. You have accessRestricted Access
      The DELLA Domain of GA INSENSITIVE Mediates the Interaction with the GA INSENSITIVE DWARF1A Gibberellin Receptor of Arabidopsis
      Björn C. Willige, Soumya Ghosh, Carola Nill, Melina Zourelidou, Esther M.N. Dohmann, Andreas Maier, Claus Schwechheimer
      Plant Cell Apr 2007, 19 (4) 1209-1220; DOI: https://doi.org/10.1105/tpc.107.051441

      Gibberellic acid (GA) responses are repressed by proteins with a DELLA domain, which is essential for GA-dependent proteasomal degradation of the DELLA repressors. This work reveals that DELLA domain mutations described for a range of dwarfing alleles impair GA receptor interactions and that the DELLA domain of the repressor GIBBERELLIC ACID INSENSITIVE is sufficient for this interaction.

  5. Nishimura, Minoru

    1. You have accessRestricted Access
      Rice NON-YELLOW COLORING1 Is Involved in Light-Harvesting Complex II and Grana Degradation during Leaf Senescence
      Makoto Kusaba, Hisashi Ito, Ryouhei Morita, Shuichi Iida, Yutaka Sato, Masaru Fujimoto, Shinji Kawasaki, Ryouichi Tanaka, Hirohiko Hirochika, Minoru Nishimura, Ayumi Tanaka
      Plant Cell Apr 2007, 19 (4) 1362-1375; DOI: https://doi.org/10.1105/tpc.106.042911

      Leaf senescence involves degradation of photosynthetic pigments, proteins, and chloroplasts. This work finds that defects in a possible chlorophyll b reductase, the first enzyme in chlorophyll b degradation, inhibit LHCII and grana degradation in leaf senescence and result in a stay-green phenotype, suggesting that chlorophyll b degradation might be an important regulatory point in leaf senescence.

O

  1. Odorizzi, Greg

    1. You have accessRestricted Access
      The Arabidopsis AAA ATPase SKD1 Is Involved in Multivesicular Endosome Function and Interacts with Its Positive Regulator LYST-INTERACTING PROTEIN5
      Thomas J. Haas, Marek K. Sliwinski, Dana E. Martínez, Mary Preuss, Kazuo Ebine, Takashi Ueda, Erik Nielsen, Greg Odorizzi, Marisa S. Otegui
      Plant Cell Apr 2007, 19 (4) 1295-1312; DOI: https://doi.org/10.1105/tpc.106.049346

      Class E vacuolar protein sorting (VPS) proteins function in endosomal sorting of secretory and endocytic cargo. This work identifies an Arabidopsis homolog of the yeast and mammalian VPS4 protein, SUPPRESSOR OF K+ TRANSPORT GROWTH DEFECT1 (SKD1), which localizes to the cytoplasm and endosomes. In addition, LYST-INTERACTING PROTEIN5 is identified as a strong positive regulator of SKD1 ATPase activity.

  2. Oh, Eunkyoo

    1. You have accessRestricted Access
      PIL5, a Phytochrome-Interacting bHLH Protein, Regulates Gibberellin Responsiveness by Binding Directly to the GAI and RGA Promoters in Arabidopsis Seeds
      Eunkyoo Oh, Shinjiro Yamaguchi, Jianhong Hu, Jikumaru Yusuke, Byunghyuck Jung, Inyup Paik, Hee-Seung Lee, Tai-ping Sun, Yuji Kamiya, Giltsu Choi
      Plant Cell Apr 2007, 19 (4) 1192-1208; DOI: https://doi.org/10.1105/tpc.107.050153

      In plants, the proper decision to germinate is critical for plant survival. Light promotes seed germination by removing PIL5, a phytochrome-interacting light-labile bHLH transcription factor. It is shown here that PIL5 regulates gibberellin (GA) signaling genes by directly binding to their promoters and that PIL5-mediated light signaling regulates not only GA but also abscisic acid metabolism.

  3. Oldroyd, Giles E.D.

    1. You have accessRestricted Access
      An ERF Transcription Factor in Medicago truncatula That Is Essential for Nod Factor Signal Transduction
      Patrick H. Middleton, Júlia Jakab, R. Varma Penmetsa, Colby G. Starker, Jake Doll, Péter Kaló, Radhika Prabhu, John F. Marsh, Raka M. Mitra, Attila Kereszt, Brigitta Dudas, Kathryn VandenBosch, Sharon R. Long, Doug R. Cook, Gyorgy B. Kiss, Giles E.D. Oldroyd
      Plant Cell Apr 2007, 19 (4) 1221-1234; DOI: https://doi.org/10.1105/tpc.106.048264

      Legume/rhizobial symbiosis is a key player in the global nitrogen cycle by fixing atmospheric nitrogen. Recognition of bacteria by legumes requires the bacterial signaling molecule Nod factor, which induces early plant root responses in nodulation. This work identifies the transcription factor ERF Required for Nodulation as an important component of the Nod factor signal transduction pathway.

  4. Otegui, Marisa S.

    1. You have accessRestricted Access
      The Arabidopsis AAA ATPase SKD1 Is Involved in Multivesicular Endosome Function and Interacts with Its Positive Regulator LYST-INTERACTING PROTEIN5
      Thomas J. Haas, Marek K. Sliwinski, Dana E. Martínez, Mary Preuss, Kazuo Ebine, Takashi Ueda, Erik Nielsen, Greg Odorizzi, Marisa S. Otegui
      Plant Cell Apr 2007, 19 (4) 1295-1312; DOI: https://doi.org/10.1105/tpc.106.049346

      Class E vacuolar protein sorting (VPS) proteins function in endosomal sorting of secretory and endocytic cargo. This work identifies an Arabidopsis homolog of the yeast and mammalian VPS4 protein, SUPPRESSOR OF K+ TRANSPORT GROWTH DEFECT1 (SKD1), which localizes to the cytoplasm and endosomes. In addition, LYST-INTERACTING PROTEIN5 is identified as a strong positive regulator of SKD1 ATPase activity.

P

  1. Paik, Inyup

    1. You have accessRestricted Access
      PIL5, a Phytochrome-Interacting bHLH Protein, Regulates Gibberellin Responsiveness by Binding Directly to the GAI and RGA Promoters in Arabidopsis Seeds
      Eunkyoo Oh, Shinjiro Yamaguchi, Jianhong Hu, Jikumaru Yusuke, Byunghyuck Jung, Inyup Paik, Hee-Seung Lee, Tai-ping Sun, Yuji Kamiya, Giltsu Choi
      Plant Cell Apr 2007, 19 (4) 1192-1208; DOI: https://doi.org/10.1105/tpc.107.050153

      In plants, the proper decision to germinate is critical for plant survival. Light promotes seed germination by removing PIL5, a phytochrome-interacting light-labile bHLH transcription factor. It is shown here that PIL5 regulates gibberellin (GA) signaling genes by directly binding to their promoters and that PIL5-mediated light signaling regulates not only GA but also abscisic acid metabolism.

  2. Paradies, Susanne

    1. You have accessRestricted Access
      The Nuclear-Encoded Factor HCF173 Is Involved in the Initiation of Translation of the psbA mRNA in Arabidopsis thaliana
      Kerstin Schult, Karin Meierhoff, Susanne Paradies, Thomas Töller, Petra Wolff, Peter Westhoff
      Plant Cell Apr 2007, 19 (4) 1329-1346; DOI: https://doi.org/10.1105/tpc.106.042895

      Photosystem II is a genetic mosaic consisting of plastid- and nuclear-encoded subunits requiring coordinated gene expression in both compartments. This work finds that the nuclear-encoded factor HIGH CHLOROPHYLL FLUORESCENCE 173 is essential for photosystem II biogenesis. Lack of the protein results in drastically reduced D1 synthesis due to decreased translation of the psbA mRNA.

  3. Pardo, José M.

    1. Open Access
      SCABP8/CBL10, a Putative Calcium Sensor, Interacts with the Protein Kinase SOS2 to Protect Arabidopsis Shoots from Salt Stress
      Ruidang Quan, Huixin Lin, Imelda Mendoza, Yuguo Zhang, Wanhong Cao, Yongqing Yang, Mei Shang, Shouyi Chen, José M. Pardo, Yan Guo
      Plant Cell Apr 2007, 19 (4) 1415-1431; DOI: https://doi.org/10.1105/tpc.106.042291

      Functionally equivalent genes often display spatial and temporal differences in transcriptional regulation but may also have unique functions. As shown here, the similar calcium binding proteins SCABP8 and SOS3 protect shoot and root tissues, respectively, from salt stress by activating and recruiting the SOS2 kinase, but they also differ in additional regulatory mechanisms specific to each protein.

  4. Pauly, Markus

    1. You have accessRestricted Access
      The Transcription Factor WIN1/SHN1 Regulates Cutin Biosynthesis in Arabidopsis thaliana
      Rubini Kannangara, Caroline Branigan, Yan Liu, Teresa Penfield, Vijaya Rao, Grégory Mouille, Herman Höfte, Markus Pauly, José Luis Riechmann, Pierre Broun
      Plant Cell Apr 2007, 19 (4) 1278-1294; DOI: https://doi.org/10.1105/tpc.106.047076

      The protective role of a plant's cuticle in abiotic stress and biotic interactions depends on its permeability. These results suggest that the transcription factor WAX INDUCER1 controls cuticle formation by directly or collaboratively activating the transcription of cutin biosynthesis genes and modulates cuticle permeability through its influence on cutin composition.

  5. Penfield, Teresa

    1. You have accessRestricted Access
      The Transcription Factor WIN1/SHN1 Regulates Cutin Biosynthesis in Arabidopsis thaliana
      Rubini Kannangara, Caroline Branigan, Yan Liu, Teresa Penfield, Vijaya Rao, Grégory Mouille, Herman Höfte, Markus Pauly, José Luis Riechmann, Pierre Broun
      Plant Cell Apr 2007, 19 (4) 1278-1294; DOI: https://doi.org/10.1105/tpc.106.047076

      The protective role of a plant's cuticle in abiotic stress and biotic interactions depends on its permeability. These results suggest that the transcription factor WAX INDUCER1 controls cuticle formation by directly or collaboratively activating the transcription of cutin biosynthesis genes and modulates cuticle permeability through its influence on cutin composition.

  6. Peng, Lianwei

    1. You have accessRestricted Access
      Formation of DEG5 and DEG8 Complexes and Their Involvement in the Degradation of Photodamaged Photosystem II Reaction Center D1 Protein in Arabidopsis
      Xuwu Sun, Lianwei Peng, Jinkui Guo, Wei Chi, Jinfang Ma, Congming Lu, Lixin Zhang
      Plant Cell Apr 2007, 19 (4) 1347-1361; DOI: https://doi.org/10.1105/tpc.106.049510

      The widely distributed DEGP proteases play important roles in the degradation of damaged and misfolded proteins. This report reveals that Arabidopsis DEG5 and DEG8 form a hexamer in the thylakoid lumen and are important for efficient turnover of the photosystem II D1 protein and for protection against photoinhibition in vivo.

  7. Penmetsa, R. Varma

    1. You have accessRestricted Access
      An ERF Transcription Factor in Medicago truncatula That Is Essential for Nod Factor Signal Transduction
      Patrick H. Middleton, Júlia Jakab, R. Varma Penmetsa, Colby G. Starker, Jake Doll, Péter Kaló, Radhika Prabhu, John F. Marsh, Raka M. Mitra, Attila Kereszt, Brigitta Dudas, Kathryn VandenBosch, Sharon R. Long, Doug R. Cook, Gyorgy B. Kiss, Giles E.D. Oldroyd
      Plant Cell Apr 2007, 19 (4) 1221-1234; DOI: https://doi.org/10.1105/tpc.106.048264

      Legume/rhizobial symbiosis is a key player in the global nitrogen cycle by fixing atmospheric nitrogen. Recognition of bacteria by legumes requires the bacterial signaling molecule Nod factor, which induces early plant root responses in nodulation. This work identifies the transcription factor ERF Required for Nodulation as an important component of the Nod factor signal transduction pathway.

  8. Pirona, Raul

    1. You have accessRestricted Access
      Maize Histone Deacetylase hda101 Is Involved in Plant Development, Gene Transcription, and Sequence-Specific Modulation of Histone Modification of Genes and Repeats
      Vincenzo Rossi, Sabrina Locatelli, Serena Varotto, Guenter Donn, Raul Pirona, David A. Henderson, Hans Hartings, Mario Motto
      Plant Cell Apr 2007, 19 (4) 1145-1162; DOI: https://doi.org/10.1105/tpc.106.042549

      The modulation of chromatin structure is mediated by enzymes such as histone acetyltransferases and deacetylases (HDACs). This functional characterization of a maize HDAC, HDA101, shows that it reversibly regulates histone acetylation, thus controlling gene and repeat activity, setting the histone code, and modulating developmental programs.

  9. Prabhu, Radhika

    1. You have accessRestricted Access
      An ERF Transcription Factor in Medicago truncatula That Is Essential for Nod Factor Signal Transduction
      Patrick H. Middleton, Júlia Jakab, R. Varma Penmetsa, Colby G. Starker, Jake Doll, Péter Kaló, Radhika Prabhu, John F. Marsh, Raka M. Mitra, Attila Kereszt, Brigitta Dudas, Kathryn VandenBosch, Sharon R. Long, Doug R. Cook, Gyorgy B. Kiss, Giles E.D. Oldroyd
      Plant Cell Apr 2007, 19 (4) 1221-1234; DOI: https://doi.org/10.1105/tpc.106.048264

      Legume/rhizobial symbiosis is a key player in the global nitrogen cycle by fixing atmospheric nitrogen. Recognition of bacteria by legumes requires the bacterial signaling molecule Nod factor, which induces early plant root responses in nodulation. This work identifies the transcription factor ERF Required for Nodulation as an important component of the Nod factor signal transduction pathway.

  10. Preuss, Mary

    1. You have accessRestricted Access
      The Arabidopsis AAA ATPase SKD1 Is Involved in Multivesicular Endosome Function and Interacts with Its Positive Regulator LYST-INTERACTING PROTEIN5
      Thomas J. Haas, Marek K. Sliwinski, Dana E. Martínez, Mary Preuss, Kazuo Ebine, Takashi Ueda, Erik Nielsen, Greg Odorizzi, Marisa S. Otegui
      Plant Cell Apr 2007, 19 (4) 1295-1312; DOI: https://doi.org/10.1105/tpc.106.049346

      Class E vacuolar protein sorting (VPS) proteins function in endosomal sorting of secretory and endocytic cargo. This work identifies an Arabidopsis homolog of the yeast and mammalian VPS4 protein, SUPPRESSOR OF K+ TRANSPORT GROWTH DEFECT1 (SKD1), which localizes to the cytoplasm and endosomes. In addition, LYST-INTERACTING PROTEIN5 is identified as a strong positive regulator of SKD1 ATPase activity.

Q

  1. Quan, Ruidang

    1. Open Access
      SCABP8/CBL10, a Putative Calcium Sensor, Interacts with the Protein Kinase SOS2 to Protect Arabidopsis Shoots from Salt Stress
      Ruidang Quan, Huixin Lin, Imelda Mendoza, Yuguo Zhang, Wanhong Cao, Yongqing Yang, Mei Shang, Shouyi Chen, José M. Pardo, Yan Guo
      Plant Cell Apr 2007, 19 (4) 1415-1431; DOI: https://doi.org/10.1105/tpc.106.042291

      Functionally equivalent genes often display spatial and temporal differences in transcriptional regulation but may also have unique functions. As shown here, the similar calcium binding proteins SCABP8 and SOS3 protect shoot and root tissues, respectively, from salt stress by activating and recruiting the SOS2 kinase, but they also differ in additional regulatory mechanisms specific to each protein.

R

  1. Rao, Vijaya

    1. You have accessRestricted Access
      The Transcription Factor WIN1/SHN1 Regulates Cutin Biosynthesis in Arabidopsis thaliana
      Rubini Kannangara, Caroline Branigan, Yan Liu, Teresa Penfield, Vijaya Rao, Grégory Mouille, Herman Höfte, Markus Pauly, José Luis Riechmann, Pierre Broun
      Plant Cell Apr 2007, 19 (4) 1278-1294; DOI: https://doi.org/10.1105/tpc.106.047076

      The protective role of a plant's cuticle in abiotic stress and biotic interactions depends on its permeability. These results suggest that the transcription factor WAX INDUCER1 controls cuticle formation by directly or collaboratively activating the transcription of cutin biosynthesis genes and modulates cuticle permeability through its influence on cutin composition.

  2. Riechmann, José Luis

    1. You have accessRestricted Access
      The Transcription Factor WIN1/SHN1 Regulates Cutin Biosynthesis in Arabidopsis thaliana
      Rubini Kannangara, Caroline Branigan, Yan Liu, Teresa Penfield, Vijaya Rao, Grégory Mouille, Herman Höfte, Markus Pauly, José Luis Riechmann, Pierre Broun
      Plant Cell Apr 2007, 19 (4) 1278-1294; DOI: https://doi.org/10.1105/tpc.106.047076

      The protective role of a plant's cuticle in abiotic stress and biotic interactions depends on its permeability. These results suggest that the transcription factor WAX INDUCER1 controls cuticle formation by directly or collaboratively activating the transcription of cutin biosynthesis genes and modulates cuticle permeability through its influence on cutin composition.

  3. Rookes, James Edward

    1. Open Access
      Heterotrimeric G Protein γ Subunits Provide Functional Selectivity in Gβγ Dimer Signaling in Arabidopsis
      Yuri Trusov, James Edward Rookes, Kimberley Tilbrook, David Chakravorty, Michael Glenn Mason, David Anderson, Jin-Gui Chen, Alan M. Jones, José Ramón Botella
      Plant Cell Apr 2007, 19 (4) 1235-1250; DOI: https://doi.org/10.1105/tpc.107.050096

      G proteins are important signaling molecules in plants and animal systems. This work provides evidence that plant heterotrimeric G proteins use both Gγ subunits to convey functional selectivity to the Gβγ dimers and reveals a mechanism underlying the complexity of G protein–mediated signaling in plants.

  4. Rossi, Vincenzo

    1. You have accessRestricted Access
      Maize Histone Deacetylase hda101 Is Involved in Plant Development, Gene Transcription, and Sequence-Specific Modulation of Histone Modification of Genes and Repeats
      Vincenzo Rossi, Sabrina Locatelli, Serena Varotto, Guenter Donn, Raul Pirona, David A. Henderson, Hans Hartings, Mario Motto
      Plant Cell Apr 2007, 19 (4) 1145-1162; DOI: https://doi.org/10.1105/tpc.106.042549

      The modulation of chromatin structure is mediated by enzymes such as histone acetyltransferases and deacetylases (HDACs). This functional characterization of a maize HDAC, HDA101, shows that it reversibly regulates histone acetylation, thus controlling gene and repeat activity, setting the histone code, and modulating developmental programs.

S

  1. Sakamoto, Wataru

    1. You have accessRestricted Access
      The Balance between Protein Synthesis and Degradation in Chloroplasts Determines Leaf Variegation in Arabidopsis yellow variegated Mutants
      Eiko Miura, Yusuke Kato, Ryo Matsushima, Verónica Albrecht, Soumaya Laalami, Wataru Sakamoto
      Plant Cell Apr 2007, 19 (4) 1313-1328; DOI: https://doi.org/10.1105/tpc.106.049270

      Leaf variegation has long been recognized as a genetic trait, but the question remains as to why and how green and white sectors are formed in the same leaf in a uniform genetic background. In this work, identification of trans-acting mutations that suppress leaf variegation in an Arabidopsis mutant demonstrates a mechanism for variegation associated with chloroplast activities.

  2. Sato, Yutaka

    1. You have accessRestricted Access
      Rice NON-YELLOW COLORING1 Is Involved in Light-Harvesting Complex II and Grana Degradation during Leaf Senescence
      Makoto Kusaba, Hisashi Ito, Ryouhei Morita, Shuichi Iida, Yutaka Sato, Masaru Fujimoto, Shinji Kawasaki, Ryouichi Tanaka, Hirohiko Hirochika, Minoru Nishimura, Ayumi Tanaka
      Plant Cell Apr 2007, 19 (4) 1362-1375; DOI: https://doi.org/10.1105/tpc.106.042911

      Leaf senescence involves degradation of photosynthetic pigments, proteins, and chloroplasts. This work finds that defects in a possible chlorophyll b reductase, the first enzyme in chlorophyll b degradation, inhibit LHCII and grana degradation in leaf senescence and result in a stay-green phenotype, suggesting that chlorophyll b degradation might be an important regulatory point in leaf senescence.

  3. Scholz, James

    1. You have accessRestricted Access
      Roles of Arabidopsis Cyclin-Dependent Kinase C Complexes in Cauliflower Mosaic Virus Infection, Plant Growth, and Development
      Xiaofeng Cui, Baofang Fan, James Scholz, Zhixiang Chen
      Plant Cell Apr 2007, 19 (4) 1388-1402; DOI: https://doi.org/10.1105/tpc.107.051375

      Arabidopsis cyclin-dependent kinase CDKC;2 and its cyclin T partner CYCT1;5 encode two interacting proteins that form a complex with an important role in cauliflower mosaic virus (CaMV) infection. This report establishes these CDKC kinase complexes as important host targets of CaMV for transcriptional activation of viral genes and critical regulators of plant growth and development.

  4. Schult, Kerstin

    1. You have accessRestricted Access
      The Nuclear-Encoded Factor HCF173 Is Involved in the Initiation of Translation of the psbA mRNA in Arabidopsis thaliana
      Kerstin Schult, Karin Meierhoff, Susanne Paradies, Thomas Töller, Petra Wolff, Peter Westhoff
      Plant Cell Apr 2007, 19 (4) 1329-1346; DOI: https://doi.org/10.1105/tpc.106.042895

      Photosystem II is a genetic mosaic consisting of plastid- and nuclear-encoded subunits requiring coordinated gene expression in both compartments. This work finds that the nuclear-encoded factor HIGH CHLOROPHYLL FLUORESCENCE 173 is essential for photosystem II biogenesis. Lack of the protein results in drastically reduced D1 synthesis due to decreased translation of the psbA mRNA.

  5. Schwager, Katja M.

    1. You have accessRestricted Access
      Characterization of the VIER F-BOX PROTEINE Genes from Arabidopsis Reveals Their Importance for Plant Growth and Development
      Katja M. Schwager, Luz Irina A. Calderon-Villalobos, Esther M.N. Dohmann, Björn C. Willige, Stephan Knierer, Carola Nill, Claus Schwechheimer
      Plant Cell Apr 2007, 19 (4) 1163-1178; DOI: https://doi.org/10.1105/tpc.105.040675

      E3 ubiquitin ligases target proteins for ubiquitin proteasome–mediated degradation, with substrate specificity conferred by F-box protein subunits. Plants have apparently recruited F-box proteins of the C subfamily to regulate phytohormone responses, axillary branching, and senescence, and this study suggests that VIER F-BOX PROTEINE family members function in lateral root formation and plant growth.

  6. Schwechheimer, Claus

    1. You have accessRestricted Access
      Characterization of the VIER F-BOX PROTEINE Genes from Arabidopsis Reveals Their Importance for Plant Growth and Development
      Katja M. Schwager, Luz Irina A. Calderon-Villalobos, Esther M.N. Dohmann, Björn C. Willige, Stephan Knierer, Carola Nill, Claus Schwechheimer
      Plant Cell Apr 2007, 19 (4) 1163-1178; DOI: https://doi.org/10.1105/tpc.105.040675

      E3 ubiquitin ligases target proteins for ubiquitin proteasome–mediated degradation, with substrate specificity conferred by F-box protein subunits. Plants have apparently recruited F-box proteins of the C subfamily to regulate phytohormone responses, axillary branching, and senescence, and this study suggests that VIER F-BOX PROTEINE family members function in lateral root formation and plant growth.

    2. You have accessRestricted Access
      The DELLA Domain of GA INSENSITIVE Mediates the Interaction with the GA INSENSITIVE DWARF1A Gibberellin Receptor of Arabidopsis
      Björn C. Willige, Soumya Ghosh, Carola Nill, Melina Zourelidou, Esther M.N. Dohmann, Andreas Maier, Claus Schwechheimer
      Plant Cell Apr 2007, 19 (4) 1209-1220; DOI: https://doi.org/10.1105/tpc.107.051441

      Gibberellic acid (GA) responses are repressed by proteins with a DELLA domain, which is essential for GA-dependent proteasomal degradation of the DELLA repressors. This work reveals that DELLA domain mutations described for a range of dwarfing alleles impair GA receptor interactions and that the DELLA domain of the repressor GIBBERELLIC ACID INSENSITIVE is sufficient for this interaction.

  7. Shang, Mei

    1. Open Access
      SCABP8/CBL10, a Putative Calcium Sensor, Interacts with the Protein Kinase SOS2 to Protect Arabidopsis Shoots from Salt Stress
      Ruidang Quan, Huixin Lin, Imelda Mendoza, Yuguo Zhang, Wanhong Cao, Yongqing Yang, Mei Shang, Shouyi Chen, José M. Pardo, Yan Guo
      Plant Cell Apr 2007, 19 (4) 1415-1431; DOI: https://doi.org/10.1105/tpc.106.042291

      Functionally equivalent genes often display spatial and temporal differences in transcriptional regulation but may also have unique functions. As shown here, the similar calcium binding proteins SCABP8 and SOS3 protect shoot and root tissues, respectively, from salt stress by activating and recruiting the SOS2 kinase, but they also differ in additional regulatory mechanisms specific to each protein.

  8. Shedge, Vikas

    1. Open Access
      Plant Mitochondrial Recombination Surveillance Requires Unusual RecA and MutS Homologs
      Vikas Shedge, Maria Arrieta-Montiel, Alan C. Christensen, Sally A. Mackenzie
      Plant Cell Apr 2007, 19 (4) 1251-1264; DOI: https://doi.org/10.1105/tpc.106.048355

      Substoichiometric shifting (SSS) is the amplification or suppression of subgenomic molecules in plant mitochondrial genomes. This report describes two nuclear genes, MSH1 and RECA3, that regulate SSS in Arabidopsis by controlling illegitimate recombination and presents the cellular and developmental implications of msh1 and recA3 mutant-associated mitochondrial genome instability in plants.

  9. Sliwinski, Marek K.

    1. You have accessRestricted Access
      The Arabidopsis AAA ATPase SKD1 Is Involved in Multivesicular Endosome Function and Interacts with Its Positive Regulator LYST-INTERACTING PROTEIN5
      Thomas J. Haas, Marek K. Sliwinski, Dana E. Martínez, Mary Preuss, Kazuo Ebine, Takashi Ueda, Erik Nielsen, Greg Odorizzi, Marisa S. Otegui
      Plant Cell Apr 2007, 19 (4) 1295-1312; DOI: https://doi.org/10.1105/tpc.106.049346

      Class E vacuolar protein sorting (VPS) proteins function in endosomal sorting of secretory and endocytic cargo. This work identifies an Arabidopsis homolog of the yeast and mammalian VPS4 protein, SUPPRESSOR OF K+ TRANSPORT GROWTH DEFECT1 (SKD1), which localizes to the cytoplasm and endosomes. In addition, LYST-INTERACTING PROTEIN5 is identified as a strong positive regulator of SKD1 ATPase activity.

  10. Starker, Colby G.

    1. You have accessRestricted Access
      An ERF Transcription Factor in Medicago truncatula That Is Essential for Nod Factor Signal Transduction
      Patrick H. Middleton, Júlia Jakab, R. Varma Penmetsa, Colby G. Starker, Jake Doll, Péter Kaló, Radhika Prabhu, John F. Marsh, Raka M. Mitra, Attila Kereszt, Brigitta Dudas, Kathryn VandenBosch, Sharon R. Long, Doug R. Cook, Gyorgy B. Kiss, Giles E.D. Oldroyd
      Plant Cell Apr 2007, 19 (4) 1221-1234; DOI: https://doi.org/10.1105/tpc.106.048264

      Legume/rhizobial symbiosis is a key player in the global nitrogen cycle by fixing atmospheric nitrogen. Recognition of bacteria by legumes requires the bacterial signaling molecule Nod factor, which induces early plant root responses in nodulation. This work identifies the transcription factor ERF Required for Nodulation as an important component of the Nod factor signal transduction pathway.

  11. Stirm, Vicki

    1. Open Access
      SIZ1-Mediated Sumoylation of ICE1 Controls CBF3/DREB1A Expression and Freezing Tolerance in Arabidopsis
      Kenji Miura, Jing Bo Jin, Jiyoung Lee, Chan Yul Yoo, Vicki Stirm, Tomoko Miura, Edward N. Ashworth, Ray A. Bressan, Dae-Jin Yun, Paul M. Hasegawa
      Plant Cell Apr 2007, 19 (4) 1403-1414; DOI: https://doi.org/10.1105/tpc.106.048397

      Low temperatures initiate signaling pathways that control gene expression necessary for cold acclimation and chilling and freezing tolerances. This work establishes that SIZ1 is a regulator of cold acclimation through sumoylation of ICE1, which induces expression of CBF/DREB1 and its regulon and facilitates freezing tolerance.

  12. Sun, Tai-ping

    1. You have accessRestricted Access
      PIL5, a Phytochrome-Interacting bHLH Protein, Regulates Gibberellin Responsiveness by Binding Directly to the GAI and RGA Promoters in Arabidopsis Seeds
      Eunkyoo Oh, Shinjiro Yamaguchi, Jianhong Hu, Jikumaru Yusuke, Byunghyuck Jung, Inyup Paik, Hee-Seung Lee, Tai-ping Sun, Yuji Kamiya, Giltsu Choi
      Plant Cell Apr 2007, 19 (4) 1192-1208; DOI: https://doi.org/10.1105/tpc.107.050153

      In plants, the proper decision to germinate is critical for plant survival. Light promotes seed germination by removing PIL5, a phytochrome-interacting light-labile bHLH transcription factor. It is shown here that PIL5 regulates gibberellin (GA) signaling genes by directly binding to their promoters and that PIL5-mediated light signaling regulates not only GA but also abscisic acid metabolism.

  13. Sun, Xuwu

    1. You have accessRestricted Access
      Formation of DEG5 and DEG8 Complexes and Their Involvement in the Degradation of Photodamaged Photosystem II Reaction Center D1 Protein in Arabidopsis
      Xuwu Sun, Lianwei Peng, Jinkui Guo, Wei Chi, Jinfang Ma, Congming Lu, Lixin Zhang
      Plant Cell Apr 2007, 19 (4) 1347-1361; DOI: https://doi.org/10.1105/tpc.106.049510

      The widely distributed DEGP proteases play important roles in the degradation of damaged and misfolded proteins. This report reveals that Arabidopsis DEG5 and DEG8 form a hexamer in the thylakoid lumen and are important for efficient turnover of the photosystem II D1 protein and for protection against photoinhibition in vivo.

T

  1. Tanaka, Ayumi

    1. You have accessRestricted Access
      Rice NON-YELLOW COLORING1 Is Involved in Light-Harvesting Complex II and Grana Degradation during Leaf Senescence
      Makoto Kusaba, Hisashi Ito, Ryouhei Morita, Shuichi Iida, Yutaka Sato, Masaru Fujimoto, Shinji Kawasaki, Ryouichi Tanaka, Hirohiko Hirochika, Minoru Nishimura, Ayumi Tanaka
      Plant Cell Apr 2007, 19 (4) 1362-1375; DOI: https://doi.org/10.1105/tpc.106.042911

      Leaf senescence involves degradation of photosynthetic pigments, proteins, and chloroplasts. This work finds that defects in a possible chlorophyll b reductase, the first enzyme in chlorophyll b degradation, inhibit LHCII and grana degradation in leaf senescence and result in a stay-green phenotype, suggesting that chlorophyll b degradation might be an important regulatory point in leaf senescence.

  2. Tanaka, Ryouichi

    1. You have accessRestricted Access
      Rice NON-YELLOW COLORING1 Is Involved in Light-Harvesting Complex II and Grana Degradation during Leaf Senescence
      Makoto Kusaba, Hisashi Ito, Ryouhei Morita, Shuichi Iida, Yutaka Sato, Masaru Fujimoto, Shinji Kawasaki, Ryouichi Tanaka, Hirohiko Hirochika, Minoru Nishimura, Ayumi Tanaka
      Plant Cell Apr 2007, 19 (4) 1362-1375; DOI: https://doi.org/10.1105/tpc.106.042911

      Leaf senescence involves degradation of photosynthetic pigments, proteins, and chloroplasts. This work finds that defects in a possible chlorophyll b reductase, the first enzyme in chlorophyll b degradation, inhibit LHCII and grana degradation in leaf senescence and result in a stay-green phenotype, suggesting that chlorophyll b degradation might be an important regulatory point in leaf senescence.

  3. Tilbrook, Kimberley

    1. Open Access
      Heterotrimeric G Protein γ Subunits Provide Functional Selectivity in Gβγ Dimer Signaling in Arabidopsis
      Yuri Trusov, James Edward Rookes, Kimberley Tilbrook, David Chakravorty, Michael Glenn Mason, David Anderson, Jin-Gui Chen, Alan M. Jones, José Ramón Botella
      Plant Cell Apr 2007, 19 (4) 1235-1250; DOI: https://doi.org/10.1105/tpc.107.050096

      G proteins are important signaling molecules in plants and animal systems. This work provides evidence that plant heterotrimeric G proteins use both Gγ subunits to convey functional selectivity to the Gβγ dimers and reveals a mechanism underlying the complexity of G protein–mediated signaling in plants.

  4. Töller, Thomas

    1. You have accessRestricted Access
      The Nuclear-Encoded Factor HCF173 Is Involved in the Initiation of Translation of the psbA mRNA in Arabidopsis thaliana
      Kerstin Schult, Karin Meierhoff, Susanne Paradies, Thomas Töller, Petra Wolff, Peter Westhoff
      Plant Cell Apr 2007, 19 (4) 1329-1346; DOI: https://doi.org/10.1105/tpc.106.042895

      Photosystem II is a genetic mosaic consisting of plastid- and nuclear-encoded subunits requiring coordinated gene expression in both compartments. This work finds that the nuclear-encoded factor HIGH CHLOROPHYLL FLUORESCENCE 173 is essential for photosystem II biogenesis. Lack of the protein results in drastically reduced D1 synthesis due to decreased translation of the psbA mRNA.

  5. Trusov, Yuri

    1. Open Access
      Heterotrimeric G Protein γ Subunits Provide Functional Selectivity in Gβγ Dimer Signaling in Arabidopsis
      Yuri Trusov, James Edward Rookes, Kimberley Tilbrook, David Chakravorty, Michael Glenn Mason, David Anderson, Jin-Gui Chen, Alan M. Jones, José Ramón Botella
      Plant Cell Apr 2007, 19 (4) 1235-1250; DOI: https://doi.org/10.1105/tpc.107.050096

      G proteins are important signaling molecules in plants and animal systems. This work provides evidence that plant heterotrimeric G proteins use both Gγ subunits to convey functional selectivity to the Gβγ dimers and reveals a mechanism underlying the complexity of G protein–mediated signaling in plants.

U

  1. Uchimiya, Hirofumi

    1. You have accessRestricted Access
      The Arabidopsis D-Type Cyclin CYCD4 Controls Cell Division in the Stomatal Lineage of the Hypocotyl Epidermis
      Atsushi Kono, Chikage Umeda-Hara, Sumiko Adachi, Noriko Nagata, Mami Konomi, Tsuyoshi Nakagawa, Hirofumi Uchimiya, Masaaki Umeda
      Plant Cell Apr 2007, 19 (4) 1265-1277; DOI: https://doi.org/10.1105/tpc.106.046763

      D-type cyclins play an essential role in cell cycle progression in response to external signals. This study demonstrates a specific requirement of cyclin D in cell divisions associated with stomatal precursor formation in the hypocotyl.

  2. Ueda, Takashi

    1. You have accessRestricted Access
      The Arabidopsis AAA ATPase SKD1 Is Involved in Multivesicular Endosome Function and Interacts with Its Positive Regulator LYST-INTERACTING PROTEIN5
      Thomas J. Haas, Marek K. Sliwinski, Dana E. Martínez, Mary Preuss, Kazuo Ebine, Takashi Ueda, Erik Nielsen, Greg Odorizzi, Marisa S. Otegui
      Plant Cell Apr 2007, 19 (4) 1295-1312; DOI: https://doi.org/10.1105/tpc.106.049346

      Class E vacuolar protein sorting (VPS) proteins function in endosomal sorting of secretory and endocytic cargo. This work identifies an Arabidopsis homolog of the yeast and mammalian VPS4 protein, SUPPRESSOR OF K+ TRANSPORT GROWTH DEFECT1 (SKD1), which localizes to the cytoplasm and endosomes. In addition, LYST-INTERACTING PROTEIN5 is identified as a strong positive regulator of SKD1 ATPase activity.

  3. Umeda, Masaaki

    1. You have accessRestricted Access
      The Arabidopsis D-Type Cyclin CYCD4 Controls Cell Division in the Stomatal Lineage of the Hypocotyl Epidermis
      Atsushi Kono, Chikage Umeda-Hara, Sumiko Adachi, Noriko Nagata, Mami Konomi, Tsuyoshi Nakagawa, Hirofumi Uchimiya, Masaaki Umeda
      Plant Cell Apr 2007, 19 (4) 1265-1277; DOI: https://doi.org/10.1105/tpc.106.046763

      D-type cyclins play an essential role in cell cycle progression in response to external signals. This study demonstrates a specific requirement of cyclin D in cell divisions associated with stomatal precursor formation in the hypocotyl.

  4. Umeda-Hara, Chikage

    1. You have accessRestricted Access
      The Arabidopsis D-Type Cyclin CYCD4 Controls Cell Division in the Stomatal Lineage of the Hypocotyl Epidermis
      Atsushi Kono, Chikage Umeda-Hara, Sumiko Adachi, Noriko Nagata, Mami Konomi, Tsuyoshi Nakagawa, Hirofumi Uchimiya, Masaaki Umeda
      Plant Cell Apr 2007, 19 (4) 1265-1277; DOI: https://doi.org/10.1105/tpc.106.046763

      D-type cyclins play an essential role in cell cycle progression in response to external signals. This study demonstrates a specific requirement of cyclin D in cell divisions associated with stomatal precursor formation in the hypocotyl.

V

  1. VandenBosch, Kathryn

    1. You have accessRestricted Access
      An ERF Transcription Factor in Medicago truncatula That Is Essential for Nod Factor Signal Transduction
      Patrick H. Middleton, Júlia Jakab, R. Varma Penmetsa, Colby G. Starker, Jake Doll, Péter Kaló, Radhika Prabhu, John F. Marsh, Raka M. Mitra, Attila Kereszt, Brigitta Dudas, Kathryn VandenBosch, Sharon R. Long, Doug R. Cook, Gyorgy B. Kiss, Giles E.D. Oldroyd
      Plant Cell Apr 2007, 19 (4) 1221-1234; DOI: https://doi.org/10.1105/tpc.106.048264

      Legume/rhizobial symbiosis is a key player in the global nitrogen cycle by fixing atmospheric nitrogen. Recognition of bacteria by legumes requires the bacterial signaling molecule Nod factor, which induces early plant root responses in nodulation. This work identifies the transcription factor ERF Required for Nodulation as an important component of the Nod factor signal transduction pathway.

  2. Varotto, Serena

    1. You have accessRestricted Access
      Maize Histone Deacetylase hda101 Is Involved in Plant Development, Gene Transcription, and Sequence-Specific Modulation of Histone Modification of Genes and Repeats
      Vincenzo Rossi, Sabrina Locatelli, Serena Varotto, Guenter Donn, Raul Pirona, David A. Henderson, Hans Hartings, Mario Motto
      Plant Cell Apr 2007, 19 (4) 1145-1162; DOI: https://doi.org/10.1105/tpc.106.042549

      The modulation of chromatin structure is mediated by enzymes such as histone acetyltransferases and deacetylases (HDACs). This functional characterization of a maize HDAC, HDA101, shows that it reversibly regulates histone acetylation, thus controlling gene and repeat activity, setting the histone code, and modulating developmental programs.

W

  1. Westhoff, Peter

    1. You have accessRestricted Access
      The Nuclear-Encoded Factor HCF173 Is Involved in the Initiation of Translation of the psbA mRNA in Arabidopsis thaliana
      Kerstin Schult, Karin Meierhoff, Susanne Paradies, Thomas Töller, Petra Wolff, Peter Westhoff
      Plant Cell Apr 2007, 19 (4) 1329-1346; DOI: https://doi.org/10.1105/tpc.106.042895

      Photosystem II is a genetic mosaic consisting of plastid- and nuclear-encoded subunits requiring coordinated gene expression in both compartments. This work finds that the nuclear-encoded factor HIGH CHLOROPHYLL FLUORESCENCE 173 is essential for photosystem II biogenesis. Lack of the protein results in drastically reduced D1 synthesis due to decreased translation of the psbA mRNA.

  2. Willige, Björn C.

    1. You have accessRestricted Access
      Characterization of the VIER F-BOX PROTEINE Genes from Arabidopsis Reveals Their Importance for Plant Growth and Development
      Katja M. Schwager, Luz Irina A. Calderon-Villalobos, Esther M.N. Dohmann, Björn C. Willige, Stephan Knierer, Carola Nill, Claus Schwechheimer
      Plant Cell Apr 2007, 19 (4) 1163-1178; DOI: https://doi.org/10.1105/tpc.105.040675

      E3 ubiquitin ligases target proteins for ubiquitin proteasome–mediated degradation, with substrate specificity conferred by F-box protein subunits. Plants have apparently recruited F-box proteins of the C subfamily to regulate phytohormone responses, axillary branching, and senescence, and this study suggests that VIER F-BOX PROTEINE family members function in lateral root formation and plant growth.

    2. You have accessRestricted Access
      The DELLA Domain of GA INSENSITIVE Mediates the Interaction with the GA INSENSITIVE DWARF1A Gibberellin Receptor of Arabidopsis
      Björn C. Willige, Soumya Ghosh, Carola Nill, Melina Zourelidou, Esther M.N. Dohmann, Andreas Maier, Claus Schwechheimer
      Plant Cell Apr 2007, 19 (4) 1209-1220; DOI: https://doi.org/10.1105/tpc.107.051441

      Gibberellic acid (GA) responses are repressed by proteins with a DELLA domain, which is essential for GA-dependent proteasomal degradation of the DELLA repressors. This work reveals that DELLA domain mutations described for a range of dwarfing alleles impair GA receptor interactions and that the DELLA domain of the repressor GIBBERELLIC ACID INSENSITIVE is sufficient for this interaction.

  3. Wolff, Petra

    1. You have accessRestricted Access
      The Nuclear-Encoded Factor HCF173 Is Involved in the Initiation of Translation of the psbA mRNA in Arabidopsis thaliana
      Kerstin Schult, Karin Meierhoff, Susanne Paradies, Thomas Töller, Petra Wolff, Peter Westhoff
      Plant Cell Apr 2007, 19 (4) 1329-1346; DOI: https://doi.org/10.1105/tpc.106.042895

      Photosystem II is a genetic mosaic consisting of plastid- and nuclear-encoded subunits requiring coordinated gene expression in both compartments. This work finds that the nuclear-encoded factor HIGH CHLOROPHYLL FLUORESCENCE 173 is essential for photosystem II biogenesis. Lack of the protein results in drastically reduced D1 synthesis due to decreased translation of the psbA mRNA.

Y

  1. Yamaguchi, Shinjiro

    1. You have accessRestricted Access
      PIL5, a Phytochrome-Interacting bHLH Protein, Regulates Gibberellin Responsiveness by Binding Directly to the GAI and RGA Promoters in Arabidopsis Seeds
      Eunkyoo Oh, Shinjiro Yamaguchi, Jianhong Hu, Jikumaru Yusuke, Byunghyuck Jung, Inyup Paik, Hee-Seung Lee, Tai-ping Sun, Yuji Kamiya, Giltsu Choi
      Plant Cell Apr 2007, 19 (4) 1192-1208; DOI: https://doi.org/10.1105/tpc.107.050153

      In plants, the proper decision to germinate is critical for plant survival. Light promotes seed germination by removing PIL5, a phytochrome-interacting light-labile bHLH transcription factor. It is shown here that PIL5 regulates gibberellin (GA) signaling genes by directly binding to their promoters and that PIL5-mediated light signaling regulates not only GA but also abscisic acid metabolism.

  2. Yang, Yongqing

    1. Open Access
      SCABP8/CBL10, a Putative Calcium Sensor, Interacts with the Protein Kinase SOS2 to Protect Arabidopsis Shoots from Salt Stress
      Ruidang Quan, Huixin Lin, Imelda Mendoza, Yuguo Zhang, Wanhong Cao, Yongqing Yang, Mei Shang, Shouyi Chen, José M. Pardo, Yan Guo
      Plant Cell Apr 2007, 19 (4) 1415-1431; DOI: https://doi.org/10.1105/tpc.106.042291

      Functionally equivalent genes often display spatial and temporal differences in transcriptional regulation but may also have unique functions. As shown here, the similar calcium binding proteins SCABP8 and SOS3 protect shoot and root tissues, respectively, from salt stress by activating and recruiting the SOS2 kinase, but they also differ in additional regulatory mechanisms specific to each protein.

  3. Yoo, Chan Yul

    1. Open Access
      SIZ1-Mediated Sumoylation of ICE1 Controls CBF3/DREB1A Expression and Freezing Tolerance in Arabidopsis
      Kenji Miura, Jing Bo Jin, Jiyoung Lee, Chan Yul Yoo, Vicki Stirm, Tomoko Miura, Edward N. Ashworth, Ray A. Bressan, Dae-Jin Yun, Paul M. Hasegawa
      Plant Cell Apr 2007, 19 (4) 1403-1414; DOI: https://doi.org/10.1105/tpc.106.048397

      Low temperatures initiate signaling pathways that control gene expression necessary for cold acclimation and chilling and freezing tolerances. This work establishes that SIZ1 is a regulator of cold acclimation through sumoylation of ICE1, which induces expression of CBF/DREB1 and its regulon and facilitates freezing tolerance.

  4. Yun, Dae-Jin

    1. Open Access
      SIZ1-Mediated Sumoylation of ICE1 Controls CBF3/DREB1A Expression and Freezing Tolerance in Arabidopsis
      Kenji Miura, Jing Bo Jin, Jiyoung Lee, Chan Yul Yoo, Vicki Stirm, Tomoko Miura, Edward N. Ashworth, Ray A. Bressan, Dae-Jin Yun, Paul M. Hasegawa
      Plant Cell Apr 2007, 19 (4) 1403-1414; DOI: https://doi.org/10.1105/tpc.106.048397

      Low temperatures initiate signaling pathways that control gene expression necessary for cold acclimation and chilling and freezing tolerances. This work establishes that SIZ1 is a regulator of cold acclimation through sumoylation of ICE1, which induces expression of CBF/DREB1 and its regulon and facilitates freezing tolerance.

  5. Yusuke, Jikumaru

    1. You have accessRestricted Access
      PIL5, a Phytochrome-Interacting bHLH Protein, Regulates Gibberellin Responsiveness by Binding Directly to the GAI and RGA Promoters in Arabidopsis Seeds
      Eunkyoo Oh, Shinjiro Yamaguchi, Jianhong Hu, Jikumaru Yusuke, Byunghyuck Jung, Inyup Paik, Hee-Seung Lee, Tai-ping Sun, Yuji Kamiya, Giltsu Choi
      Plant Cell Apr 2007, 19 (4) 1192-1208; DOI: https://doi.org/10.1105/tpc.107.050153

      In plants, the proper decision to germinate is critical for plant survival. Light promotes seed germination by removing PIL5, a phytochrome-interacting light-labile bHLH transcription factor. It is shown here that PIL5 regulates gibberellin (GA) signaling genes by directly binding to their promoters and that PIL5-mediated light signaling regulates not only GA but also abscisic acid metabolism.

Z

  1. Zhang, Lixin

    1. You have accessRestricted Access
      Formation of DEG5 and DEG8 Complexes and Their Involvement in the Degradation of Photodamaged Photosystem II Reaction Center D1 Protein in Arabidopsis
      Xuwu Sun, Lianwei Peng, Jinkui Guo, Wei Chi, Jinfang Ma, Congming Lu, Lixin Zhang
      Plant Cell Apr 2007, 19 (4) 1347-1361; DOI: https://doi.org/10.1105/tpc.106.049510

      The widely distributed DEGP proteases play important roles in the degradation of damaged and misfolded proteins. This report reveals that Arabidopsis DEG5 and DEG8 form a hexamer in the thylakoid lumen and are important for efficient turnover of the photosystem II D1 protein and for protection against photoinhibition in vivo.

  2. Zhang, Yuguo

    1. Open Access
      SCABP8/CBL10, a Putative Calcium Sensor, Interacts with the Protein Kinase SOS2 to Protect Arabidopsis Shoots from Salt Stress
      Ruidang Quan, Huixin Lin, Imelda Mendoza, Yuguo Zhang, Wanhong Cao, Yongqing Yang, Mei Shang, Shouyi Chen, José M. Pardo, Yan Guo
      Plant Cell Apr 2007, 19 (4) 1415-1431; DOI: https://doi.org/10.1105/tpc.106.042291

      Functionally equivalent genes often display spatial and temporal differences in transcriptional regulation but may also have unique functions. As shown here, the similar calcium binding proteins SCABP8 and SOS3 protect shoot and root tissues, respectively, from salt stress by activating and recruiting the SOS2 kinase, but they also differ in additional regulatory mechanisms specific to each protein.

  3. Zourelidou, Melina

    1. You have accessRestricted Access
      The DELLA Domain of GA INSENSITIVE Mediates the Interaction with the GA INSENSITIVE DWARF1A Gibberellin Receptor of Arabidopsis
      Björn C. Willige, Soumya Ghosh, Carola Nill, Melina Zourelidou, Esther M.N. Dohmann, Andreas Maier, Claus Schwechheimer
      Plant Cell Apr 2007, 19 (4) 1209-1220; DOI: https://doi.org/10.1105/tpc.107.051441

      Gibberellic acid (GA) responses are repressed by proteins with a DELLA domain, which is essential for GA-dependent proteasomal degradation of the DELLA repressors. This work reveals that DELLA domain mutations described for a range of dwarfing alleles impair GA receptor interactions and that the DELLA domain of the repressor GIBBERELLIC ACID INSENSITIVE is sufficient for this interaction.

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The Plant Cell Online: 19 (4)
The Plant Cell
Vol. 19, Issue 4
April 2007
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