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Table of Contents

The Plant Cell Online: 23 (3)
Mar 2011

IN BRIEF

  • You have accessRestricted Access
    Will the Real Florigen Please Stand Up? Sorting FT Homologs in Maize
    Jennifer Mach
    Plant Cell Mar 2011, 23 (3) 843; DOI: https://doi.org/10.1105/tpc.111.230310
  • You have accessRestricted Access
    A Revised Function for ACCUMULATION OF PHOTOSYSTEM ONE1
    Nancy R. Hofmann
    Plant Cell Mar 2011, 23 (3) 844; DOI: https://doi.org/10.1105/tpc.111.230311
  • You have accessRestricted Access
    Indolebutyric Acid–Derived Auxin and Plant Development
    Gregory Bertoni
    Plant Cell Mar 2011, 23 (3) 845; DOI: https://doi.org/10.1105/tpc.111.230312

LETTERS TO THE EDITOR

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    ARF1 Localizes to the Golgi and the Trans-Golgi Network
    David G. Robinson, David Scheuring, Satoshi Naramoto, Jirí Friml
    Plant Cell Mar 2011, 23 (3) 846-849; DOI: https://doi.org/10.1105/tpc.110.082099
  • You have accessRestricted Access
    Reply: On ARF1 Localizes to the Golgi and the Trans-Golgi Network: Future Challenge in Plant Multivesicular Body Studies
    Hans Thordal-Christensen, Henrik Böhlenius, Sara M. Mørch, Mads E. Nielsen
    Plant Cell Mar 2011, 23 (3) 849-850; DOI: https://doi.org/10.1105/tpc.111.230340

COMMENTARY

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    An Evolutionarily Conserved Pseudokinase Mediates Stem Cell Production in Plants
    Zachary L. Nimchuk, Paul T. Tarr, Elliot M. Meyerowitz
    Plant Cell Mar 2011, 23 (3) 851-854; DOI: https://doi.org/10.1105/tpc.110.075622

REVIEWS

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    Intercellular Communication during Plant Development
    Jaimie M. Van Norman, Natalie W. Breakfield, Philip N. Benfey
    Plant Cell Mar 2011, 23 (3) 855-864; DOI: https://doi.org/10.1105/tpc.111.082982
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    The Emerging Importance of Type I MADS Box Transcription Factors for Plant Reproduction
    Simona Masiero, Lucia Colombo, Paul E Grini, Arp Schnittger, Martin M Kater
    Plant Cell Mar 2011, 23 (3) 865-872; DOI: https://doi.org/10.1105/tpc.110.081737

    Based on their evolutionary origin, MADS box transcription factor genes have been divided into two classes, namely, type I and II. The plant-specific type II MIKC MADS box genes have been most intensively studied and shown to be key regulators of developmental processes, such as meristem identity, flowering time, and fruit and seed development. By contrast, very little is known about type I MADS domain transcription factors, and they have not attracted interest for a long time. A number of recent studies have now indicated a key regulatory role for type I MADS box factors in plant reproduction, in particular in specifying female gametophyte, embryo, and endosperm development. These analyses have also suggested that type I MADS box factors are decisive for setting reproductive boundaries between species.

LARGE-SCALE BIOLOGY ARTICLES

  • Open Access
    High-Resolution Temporal Profiling of Transcripts during Arabidopsis Leaf Senescence Reveals a Distinct Chronology of Processes and Regulation
    Emily Breeze, Elizabeth Harrison, Stuart McHattie, Linda Hughes, Richard Hickman, Claire Hill, Steven Kiddle, Youn-sung Kim, Christopher A. Penfold, Dafyd Jenkins, Cunjin Zhang, Karl Morris, Carol Jenner, Stephen Jackson, Brian Thomas, Alexandra Tabrett, Roxane Legaie, Jonathan D. Moore, David L. Wild, Sascha Ott, David Rand, Jim Beynon, Katherine Denby, Andrew Mead, Vicky Buchanan-Wollaston
    Plant Cell Mar 2011, 23 (3) 873-894; DOI: https://doi.org/10.1105/tpc.111.083345

    This work presents a high-resolution time-course analysis of gene expression during development of a leaf from expansion through senescence. Enrichment in ontologies, sequence motifs, and transcription factor families within genes showing altered expression over time identified both metabolic pathways and potential regulators active at different stages of leaf development and senescence.

  • Open Access
    PlaNet: Combined Sequence and Expression Comparisons across Plant Networks Derived from Seven Species
    Marek Mutwil, Sebastian Klie, Takayuki Tohge, Federico M. Giorgi, Olivia Wilkins, Malcolm M. Campbell, Alisdair R. Fernie, Björn Usadel, Zoran Nikoloski, Staffan Persson
    Plant Cell Mar 2011, 23 (3) 895-910; DOI: https://doi.org/10.1105/tpc.111.083667

    Genes that are similarly expressed, or coexpressed, are often involved in related biological processes. Such coexpressed relationships also appear to be conserved across species. The PlaNet platform enables comparative analysis of genome-wide coexpression networks across seven plant species, thus enabling prediction of gene function and elucidation of the identity of functional homologs.

  • Open Access
    The Predicted Arabidopsis Interactome Resource and Network Topology-Based Systems Biology Analyses
    Mingzhi Lin, Xi Zhou, Xueling Shen, Chuanzao Mao, Xin Chen
    Plant Cell Mar 2011, 23 (3) 911-922; DOI: https://doi.org/10.1105/tpc.110.082529

    Protein–protein interactions are important mechanisms for genes and gene networks to function. This study demonstrates that, although the PAIR database has limited coverage, representing ~24% of the entire interactome with ~40% precision, it is rich enough to capture many significant functional linkages within and between higher-order biological systems, such as pathways and biological processes.

RESEARCH ARTICLES

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    Transcriptome and Metabolite Profiling Show That APETALA2a Is a Major Regulator of Tomato Fruit Ripening
    Rumyana Karlova, Faye M. Rosin, Jacqueline Busscher-Lange, Violeta Parapunova, Phuc T. Do, Alisdair R. Fernie, Paul D. Fraser, Charles Baxter, Gerco C. Angenent, Ruud A. de Maagd
    Plant Cell Mar 2011, 23 (3) 923-941; DOI: https://doi.org/10.1105/tpc.110.081273

    This study demonstrates that the tomato APETALA2a (AP2a) transcription factor modulates fruit ripening by negatively regulating ethylene biosynthesis and signaling. Various ripening regulators are shown to act upstream of AP2a. Gene expression analysis reveals that AP2a is involved in chloroplast to chromoplast transition.

  • Open Access
    The FT-Like ZCN8 Gene Functions as a Floral Activator and Is Involved in Photoperiod Sensitivity in Maize
    Xin Meng, Michael G. Muszynski, Olga N. Danilevskaya
    Plant Cell Mar 2011, 23 (3) 942-960; DOI: https://doi.org/10.1105/tpc.110.081406

    The transition from vegetative to reproductive development is regulated by the activity of graft-transmissible flowering hormone, florigen, which is encoded by the FLOWERING LOCUS T (FT) family of mobile proteins. This work identified, among many maize FT-like genes, a single gene, ZCN8, which has all required characteristics to function as florigen.

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    BROTHER OF LUX ARRHYTHMO Is a Component of the Arabidopsis Circadian Clock
    Shunhong Dai, Xiaoping Wei, Liping Pei, Rebecca L. Thompson, Yi Liu, Jacqueline E. Heard, Thomas G. Ruff, Roger N. Beachy
    Plant Cell Mar 2011, 23 (3) 961-972; DOI: https://doi.org/10.1105/tpc.111.084293

    This work shows that the Arabidopsis transcription factor BROTHER OF LUX ARRHYTHMO (BOA) is an activator in regulating the expression of CIRCADIAN CLOCK ASSOCIATED1 (CCA1). BOA forms a transcriptional feedback loop with CCA1 and regulates circadian rhythms in Arabidopsis.

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    AUXIN RESPONSE FACTOR8 Regulates Arabidopsis Petal Growth by Interacting with the bHLH Transcription Factor BIGPETALp
    Emilie Varaud, Florian Brioudes, Judit Szécsi, Julie Leroux, Spencer Brown, Catherine Perrot-Rechenmann, Mohammed Bendahmane
    Plant Cell Mar 2011, 23 (3) 973-983; DOI: https://doi.org/10.1105/tpc.110.081653

    This study defines a previously unknown combinatorial interaction between transcription factors in plants and provides a better understanding of how plants integrate signals to regulate petal development. It also highlights the role of a motif in the bHLH transcription factor that resembles a motif that was previously shown to be important in auxin signaling.

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    Multiple Facets of Arabidopsis Seedling Development Require Indole-3-Butyric Acid–Derived Auxin
    Lucia C. Strader, Dorthea L. Wheeler, Sarah E. Christensen, John C. Berens, Jerry D. Cohen, Rebekah A. Rampey, Bonnie Bartel
    Plant Cell Mar 2011, 23 (3) 984-999; DOI: https://doi.org/10.1105/tpc.111.083071

    Plants synthesize the growth hormone indole-3-acetic acid using a variety of incompletely understood pathways. This work demonstrates that the conversion of indole-3-butyric acid to indole-3-acetic acid contributes to wide-ranging auxin-regulated processes in Arabidopsis seedlings and that shutting off this auxin supply renders seedlings less able to respond to exogenous auxin.

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    The Jasmonate-ZIM Domain Proteins Interact with the R2R3-MYB Transcription Factors MYB21 and MYB24 to Affect Jasmonate-Regulated Stamen Development in Arabidopsis
    Susheng Song, Tiancong Qi, Huang Huang, Qingcuo Ren, Dewei Wu, Changqing Chang, Wen Peng, Yule Liu, Jinrong Peng, Daoxin Xie
    Plant Cell Mar 2011, 23 (3) 1000-1013; DOI: https://doi.org/10.1105/tpc.111.083089

    Jasmonate is essential for diverse biological processes, including male fertility and plant defense in Arabidopsis. This work shows that the R2R3-MYB transcription factors MYB21 and MYB24 function as direct targets of JAZ proteins to mediate jasmonate-regulated stamen development.

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    Geminiviruses Subvert Ubiquitination by Altering CSN-Mediated Derubylation of SCF E3 Ligase Complexes and Inhibit Jasmonate Signaling in Arabidopsis thaliana
    Rosa Lozano-Durán, Tabata Rosas-Díaz, Giuliana Gusmaroli, Ana P. Luna, Ludivine Taconnat, Xing Wang Deng, Eduardo R. Bejarano
    Plant Cell Mar 2011, 23 (3) 1014-1032; DOI: https://doi.org/10.1105/tpc.110.080267

    This study shows that geminivirus C2/L2 protein interferes with the derubylation of CUL1. Responses regulated by the CUL1-based SCF ubiquitin ligases, and particularly the response to jasmonates, are altered in transgenic Arabidopsis thaliana expressing C2/L2. The capability to selectively interfere with SCF complexes may define a novel and powerful strategy in viral infections.

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    The Anaphase-Promoting Complex Is a Dual Integrator That Regulates Both MicroRNA-Mediated Transcriptional Regulation of Cyclin B1 and Degradation of Cyclin B1 during Arabidopsis Male Gametophyte Development
    Binglian Zheng, Xuemei Chen, Sheila McCormick
    Plant Cell Mar 2011, 23 (3) 1033-1046; DOI: https://doi.org/10.1105/tpc.111.083980

    This study shows that, in addition to its known role in protein degradation, the anaphase-promoting complex also regulates transcription of a cell cycle gene, Cyclin B1, and that this regulation, which is mediated by microRNA, is important for pollen development.

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    The CHD3 Chromatin Remodeler PICKLE and Polycomb Group Proteins Antagonistically Regulate Meristem Activity in the Arabidopsis Root
    Ernst Aichinger, Corina B.R. Villar, Riccardo Di Mambro, Sabrina Sabatini, Claudia Köhler
    Plant Cell Mar 2011, 23 (3) 1047-1060; DOI: https://doi.org/10.1105/tpc.111.083352

    We report that the chromatin remodeling factor PICKLE and Polycomb group proteins antagonistically determine cell identity. Our study highlights an important role of PICKLE and Polycomb group proteins in regulating root meristem activity by regulating the expression of root stem cell and meristem marker genes.

  • Open Access
    Sphingolipids in the Root Play an Important Role in Regulating the Leaf Ionome in Arabidopsis thaliana
    Dai-Yin Chao, Kenneth Gable, Ming Chen, Ivan Baxter, Charles R. Dietrich, Edgar B. Cahoon, Mary Lou Guerinot, Brett Lahner, Shiyou Lü, Jonathan E. Markham, Joe Morrissey, Gongshe Han, Sita D. Gupta, Jeffrey M. Harmon, Jan G. Jaworski, Teresa M. Dunn, David E. Salt
    Plant Cell Mar 2011, 23 (3) 1061-1081; DOI: https://doi.org/10.1105/tpc.110.079095

    Sphingolipids are a diverse group of essential membrane lipids thought to play important roles in both membrane function and cellular signaling. By identifying an Arabidopsis thaliana mutant lacking 3-ketodihydrosphinganine reductase, a critical enzyme in sphingolipid biosynthesis, this work uncovers a connection between sphingolipid metabolism in roots and whole-plant mineral ion homeostasis.

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    APO1 Promotes the Splicing of Chloroplast Group II Introns and Harbors a Plant-Specific Zinc-Dependent RNA Binding Domain
    Kenneth P. Watkins, Margarita Rojas, Giulia Friso, Klaas J. van Wijk, Jörg Meurer, Alice Barkan
    Plant Cell Mar 2011, 23 (3) 1082-1092; DOI: https://doi.org/10.1105/tpc.111.084335

    This study demonstrates that APO1, originally proposed to be involved in the maturation of proteins with [4Fe-4S] ligands, is instead required for the splicing of several chloroplast introns. It shows further that DUF794, the plant-specific domain of unknown function that makes up the bulk of APO1, is an RNA binding domain harboring zinc binding motifs.

  • Open Access
    Arabidopsis Kinesin KP1 Specifically Interacts with VDAC3, a Mitochondrial Protein, and Regulates Respiration during Seed Germination at Low Temperature
    Xue-Yong Yang, Zi-Wei Chen, Tao Xu, Zhe Qu, Xiao-Di Pan, Xing-Hua Qin, Dong-Tao Ren, Guo-Qin Liu
    Plant Cell Mar 2011, 23 (3) 1093-1106; DOI: https://doi.org/10.1105/tpc.110.082420

    A plant-specific molecular motor (KP1) specifically interacts with a channel protein (VDAC3) of the mitochondrial outer membrane and is targeted to mitochondria via its tail domain. In seedlings germinated at 4°C, either mutant of the two genes exhibited increased oxygen consumption, respiration imbalance, and reduced ATP levels.

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    Patatin-Related Phospholipase pPLAIIIβ-Induced Changes in Lipid Metabolism Alter Cellulose Content and Cell Elongation in Arabidopsis
    Maoyin Li, Sung Chul Bahn, Liang Guo, William Musgrave, Howard Berg, Ruth Welti, Xuemin Wang
    Plant Cell Mar 2011, 23 (3) 1107-1123; DOI: https://doi.org/10.1105/tpc.110.081240

    Patatin-related phospholipase pPLAIIIβ lacks the canonical esterase catalytic center but possesses acyl-hydrolyzing and acyl-CoA thioesterase activities. Knockout and overexpression of pPLAIIIβ have opposite effects on the levels of membrane lipids, cellulose content, mechanical strength, and cell length. Thus, membrane lipid metabolism may be linked to cellulose production in Arabidopsis.

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    Disruption of LACCASE4 and 17 Results in Tissue-Specific Alterations to Lignification of Arabidopsis thaliana Stems
    Serge Berthet, Nathalie Demont-Caulet, Brigitte Pollet, Przemyslaw Bidzinski, Laurent Cézard, Phillipe Le Bris, Nero Borrega, Jonathan Hervé, Eddy Blondet, Sandrine Balzergue, Catherine Lapierre, Lise Jouanin
    Plant Cell Mar 2011, 23 (3) 1124-1137; DOI: https://doi.org/10.1105/tpc.110.082792

    This study provides evidence that two laccases, LAC4 and LAC17, participate in the polymerization of lignins in Arabidopsis stems. These findings suggest that the genetic engineering of lignin-specific laccases is a potentially innovative and promising tool for the fine-tuning of lignin content and structure.

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    The MYB96 Transcription Factor Regulates Cuticular Wax Biosynthesis under Drought Conditions in Arabidopsis
    Pil Joon Seo, Saet Buyl Lee, Mi Chung Suh, Mi-Jeong Park, Young Sam Go, Chung-Mo Park
    Plant Cell Mar 2011, 23 (3) 1138-1152; DOI: https://doi.org/10.1105/tpc.111.083485

    This work provides evidence that deposition of cuticular waxes is intimately associated with plant responses to drought. The Arabidopsis MYB96 transcription factor functions as a regulator of ABA-mediated cuticular wax biosynthesis under drought conditions by binding directly to the promoters of genes encoding very-long-chain fatty acid–condensing enzymes involved in cuticular wax biosynthesis.

  • Open Access
    Phosphorylation of the Nicotiana benthamiana WRKY8 Transcription Factor by MAPK Functions in the Defense Response
    Nobuaki Ishihama, Reiko Yamada, Miki Yoshioka, Shinpei Katou, Hirofumi Yoshioka
    Plant Cell Mar 2011, 23 (3) 1153-1170; DOI: https://doi.org/10.1105/tpc.110.081794

    This study identified WRKY8 as a downstream target of three mitogen-activated protein kinases in Nicotiana benthamiana. Phosphorylation of WRKY8 increased its DNA binding activity, and ectopic expression of WRKY8 induced the expression of various defense-related genes.

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    The Membrane Mucin Msb2 Regulates Invasive Growth and Plant Infection in Fusarium oxysporum
    Elena Pérez-Nadales, Antonio Di Pietro
    Plant Cell Mar 2011, 23 (3) 1171-1185; DOI: https://doi.org/10.1105/tpc.110.075093

    This study examines the activation of a conserved mitogen-activated protein kinase (MAPK) cascade that is essential for fungal pathogenicity in plants. A highly glycosylated mucin-like transmembrane protein is shown to contribute to phosphorylation of the MAPK that promotes invasive growth and virulence in the soilborne vascular wilt fungus Fusarium oxysporum.

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The Plant Cell Online: 23 (3)
The Plant Cell
Vol. 23, Issue 3
Mar 2011
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