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Table of Contents

The Plant Cell Online: 26 (7)
Jul 2014

IN BRIEF

  • Finding <em>Dt2</em>, the Dominant Gene That Specifies the Semideterminate Growth Habit in Soybean
    You have accessRestricted Access
    Finding Dt2, the Dominant Gene That Specifies the Semideterminate Growth Habit in Soybean
    Jennifer Lockhart
    Plant Cell Jul 2014, 26 (7) 2725; DOI: https://doi.org/10.1105/tpc.114.129056
  • Unexpected Structure of Plant Promoters
    You have accessRestricted Access
    Unexpected Structure of Plant Promoters
    Nancy A. Eckardt
    Plant Cell Jul 2014, 26 (7) 2726; DOI: https://doi.org/10.1105/tpc.114.129239
  • Observe Them in Their Native Habitat: Atomic Force Microscopy of Photosynthetic Complexes in Thylakoid Membranes
    You have accessRestricted Access
    Observe Them in Their Native Habitat: Atomic Force Microscopy of Photosynthetic Complexes in Thylakoid Membranes
    Nancy R. Hofmann
    Plant Cell Jul 2014, 26 (7) 2727; DOI: https://doi.org/10.1105/tpc.114.130161
  • Boron Transport in Maize
    You have accessRestricted Access
    Boron Transport in Maize
    Jennifer Mach
    Plant Cell Jul 2014, 26 (7) 2728; DOI: https://doi.org/10.1105/tpc.114.130179

LARGE-SCALE BIOLOGY ARTICLES

  • Inference of Transcriptional Networks in <em>Arabidopsis</em> through Conserved Noncoding Sequence Analysis
    You have accessRestricted Access
    Inference of Transcriptional Networks in Arabidopsis through Conserved Noncoding Sequence Analysis
    Jan Van de Velde, Ken S. Heyndrickx, Klaas Vandepoele
    Plant Cell Jul 2014, 26 (7) 2729-2745; DOI: https://doi.org/10.1105/tpc.114.127001

    The authors used comparative sequence analysis to delineate, using 12 flowering plants, conserved noncoding sequences in Arabidopsis thaliana and demonstrated a high enrichment for functional cis-regulatory elements in these conserved regions. Based on known binding sites, a gene regulatory network was generated, revealing new and condition-specific functional gene regulatory interactions.

  • Paired-End Analysis of Transcription Start Sites in <em>Arabidopsis</em> Reveals Plant-Specific Promoter Signatures
    You have accessRestricted Access
    Paired-End Analysis of Transcription Start Sites in Arabidopsis Reveals Plant-Specific Promoter Signatures
    Taj Morton, Jalean Petricka, David L. Corcoran, Song Li, Cara M. Winter, Alexa Carda, Philip N. Benfey, Uwe Ohler, Molly Megraw
    Plant Cell Jul 2014, 26 (7) 2746-2760; DOI: https://doi.org/10.1105/tpc.114.125617

    This work presents a genome-scale data set that precisely identifies transcription start sites for a majority of Arabidopsis genes, revealing that plant promoters are not primarily TATA based and have an unexpected structure composed of many position-specific sequence elements. This analysis identifies combinations of factors that are likely to lead to transcription initiation.

RESEARCH ARTICLES

  • Evolution of the BBAA Component of Bread Wheat during Its History at the Allohexaploid Level
    Open Access
    Evolution of the BBAA Component of Bread Wheat during Its History at the Allohexaploid Level
    Huakun Zhang, Bo Zhu, Bao Qi, Xiaowan Gou, Yuzhu Dong, Chunming Xu, Bangjiao Zhang, Wei Huang, Chang Liu, Xutong Wang, Chunwu Yang, Hao Zhou, Khalil Kashkush, Moshe Feldman, Jonathan F. Wendel, Bao Liu
    Plant Cell Jul 2014, 26 (7) 2761-2776; DOI: https://doi.org/10.1105/tpc.114.128439

    The extracted tetraploid wheat (ETW) containing the BBAA subgenomes of hexaploid bread wheat has a stabilized karyotype but anomalous phenotypes. Genome-wide comparisons between ETW and natural tetraploid wheat revealed a large number of differentially expressed genes in ETW; these changes showed early occurrence and evolutionary persistence during bread wheat evolution.

  • Polyploid Evolution of the Brassicaceae during the Cenozoic Era
    Open Access
    Polyploid Evolution of the Brassicaceae during the Cenozoic Era
    Sateesh Kagale, Stephen J. Robinson, John Nixon, Rong Xiao, Terry Huebert, Janet Condie, Dallas Kessler, Wayne E. Clarke, Patrick P. Edger, Matthew G. Links, Andrew G. Sharpe, Isobel A.P. Parkin
    Plant Cell Jul 2014, 26 (7) 2777-2791; DOI: https://doi.org/10.1105/tpc.114.126391

    This study identified multiple whole-genome duplication (WGD) events among Brassicaceae species. Remarkably, these events, as well as previously identified WGD events, are synchronized in age, coincident with epoch transitions, adding to the evidence suggesting the environmental instability associated with these transitions favors polyploidy and rapid species diversification.

  • Integrated Syntenic and Phylogenomic Analyses Reveal an Ancient Genome Duplication in Monocots
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    Integrated Syntenic and Phylogenomic Analyses Reveal an Ancient Genome Duplication in Monocots
    Yuannian Jiao, Jingping Li, Haibao Tang, Andrew H. Paterson
    Plant Cell Jul 2014, 26 (7) 2792-2802; DOI: https://doi.org/10.1105/tpc.114.127597

    Whole-genome duplication (WGD) is a primary source of genetic material for evolutionary variation. This work compares the genomes of four monocots and two eudicots using integrated phylogenomic and syntenic analyses, revealing an ancient WGD that shaped the genomes of all commelinid monocots, including grasses, bromeliads, bananas, gingers, palms, and other economically important plants.

  • DNA Topoisomerase I Affects Polycomb Group Protein-Mediated Epigenetic Regulation and Plant Development by Altering Nucleosome Distribution in <em>Arabidopsis</em>
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    DNA Topoisomerase I Affects Polycomb Group Protein-Mediated Epigenetic Regulation and Plant Development by Altering Nucleosome Distribution in Arabidopsis
    Xigang Liu, Lei Gao, Thanh Theresa Dinh, Ting Shi, Dongming Li, Ruozhong Wang, Lin Guo, Langtao Xiao, Xuemei Chen
    Plant Cell Jul 2014, 26 (7) 2803-2817; DOI: https://doi.org/10.1105/tpc.114.124941

    Given the role of topoisomerases in relieving torsional stresses in DNA during replication or transcription, it is surprising that the topoisomerase TOP1α plays a role in specific developmental processes. This study uncovers a connection between TOP1α and the deposition of the histone H3K27me3 mark at Polycomb Group target genes, which regulates target gene expression and, hence, developmental events.

  • Genetical and Comparative Genomics of <em>Brassica</em> under Altered Ca Supply Identifies <em>Arabidopsis</em> Ca-Transporter Orthologs
    Open Access
    Genetical and Comparative Genomics of Brassica under Altered Ca Supply Identifies Arabidopsis Ca-Transporter Orthologs
    Neil S. Graham, John P. Hammond, Artem Lysenko, Sean Mayes, Seosamh Ó Lochlainn, Bego Blasco, Helen C. Bowen, Chris J. Rawlings, Juan J. Rios, Susan Welham, Pierre W.C. Carion, Lionel X. Dupuy, Graham J. King, Philip J. White, Martin R. Broadley
    Plant Cell Jul 2014, 26 (7) 2818-2830; DOI: https://doi.org/10.1105/tpc.114.128603

    This work uses multiple-environment expression quantitative trait locus analysis of the Brassica rapa genome, combined with comparative genomics of Arabidopsis, to identify putative vacuolar calcium transporters with potential uses in biofortification to increase the accumulation of calcium in food crops.

  • <em>Dt2</em> Is a Gain-of-Function MADS-Domain Factor Gene That Specifies Semideterminacy in Soybean
    You have accessRestricted Access
    Dt2 Is a Gain-of-Function MADS-Domain Factor Gene That Specifies Semideterminacy in Soybean
    Jieqing Ping, Yunfeng Liu, Lianjun Sun, Meixia Zhao, Yinghui Li, Maoyun She, Yi Sui, Feng Lin, Xiaodong Liu, Zongxiang Tang, Hanh Nguyen, Zhixi Tian, Lijuan Qiu, Randall L. Nelson, Thomas E. Clemente, James E. Specht, Jianxin Ma
    Plant Cell Jul 2014, 26 (7) 2831-2842; DOI: https://doi.org/10.1105/tpc.114.126938

    This work describes mapped-based cloning and characterization of a gain-of-function mutation (Dt2) that specifies semideterminate stem termination in soybean. Dt2 represents an evolutionary novelty and uniqueness of the genetic mechanisms underlying plant stem growth habit and may be a more productive alternative for soybean production, particularly in high fertility and irrigated environments.

  • LNK1 and LNK2 Are Transcriptional Coactivators in the <em>Arabidopsis</em> Circadian Oscillator
    Open Access
    LNK1 and LNK2 Are Transcriptional Coactivators in the Arabidopsis Circadian Oscillator
    Qiguang Xie, Peng Wang, Xian Liu, Li Yuan, Lingbao Wang, Chenguang Zhang, Yue Li, Hongya Xing, Liya Zhi, Zhiliang Yue, Chunsheng Zhao, C. Robertson McClung, Xiaodong Xu
    Plant Cell Jul 2014, 26 (7) 2843-2857; DOI: https://doi.org/10.1105/tpc.114.126573

    The plant circadian clock consists of multiple interlocked transcriptional feedback loops. This work shows that LNK1 and LNK2, two NIGHT LIGHT–INDUCIBLE AND CLOCK-REGULATED genes, encode transcriptional coactivators that physically interact in the nucleus with multiple Myb transcription factors (CCA1, LHY, RVE4, and RVE8) and are necessary for full transcriptional induction of PRR5 and TOC1 by RVE8.

  • HUA ENHANCER1 Is Involved in Posttranscriptional Regulation of Positive and Negative Regulators in <em>Arabidopsis</em> Photomorphogenesis
    Open Access
    HUA ENHANCER1 Is Involved in Posttranscriptional Regulation of Positive and Negative Regulators in Arabidopsis Photomorphogenesis
    Huang-Lung Tsai, Yi-Hang Li, Wen-Ping Hsieh, Meng-Chun Lin, Ji Hoon Ahn, Shu-Hsing Wu
    Plant Cell Jul 2014, 26 (7) 2858-2872; DOI: https://doi.org/10.1105/tpc.114.126722

    This work reports that the expression of HEN1, a small regulatory RNA methyltransferase essential for microRNA biogenesis, is activated by light signaling pathways to regulate Arabidopsis photomorphogenesis. The expression of positive (HY5) and negative (TCPs) regulators is tuned by miR157d and miR319, respectively, in deetiolating seedlings, demonstrating a posttranscriptional control in the photomorphogenic development.

  • Transcriptome Analysis Reveals the Same 17 <em>S-Locus F-Box</em> Genes in Two Haplotypes of the Self-Incompatibility Locus of <em>Petunia inflata</em>
    You have accessRestricted Access
    Transcriptome Analysis Reveals the Same 17 S-Locus F-Box Genes in Two Haplotypes of the Self-Incompatibility Locus of Petunia inflata
    Justin S. Williams, Joshua P. Der, Claude W. dePamphilis, Teh-hui Kao
    Plant Cell Jul 2014, 26 (7) 2873-2888; DOI: https://doi.org/10.1105/tpc.114.126920

    This work characterizes the pollen transcriptomes of Petunia inflata to identify all S-locus F-box (SLF) genes of two S-haplotypes, S2 and S3. In addition to the 10 previously identified SLF genes, the same seven novel SLF genes were identified in the two haplotypes, suggesting that a total of 17 SLF genes in these two haplotypes collectively regulate pollen specificity in self-incompatibility.

  • TAA1-Regulated Local Auxin Biosynthesis in the Root-Apex Transition Zone Mediates the Aluminum-Induced Inhibition of Root Growth in <em>Arabidopsis</em>
    Open Access
    TAA1-Regulated Local Auxin Biosynthesis in the Root-Apex Transition Zone Mediates the Aluminum-Induced Inhibition of Root Growth in Arabidopsis
    Zhong-Bao Yang, Xiaoyu Geng, Chunmei He, Feng Zhang, Rong Wang, Walter J. Horst, Zhaojun Ding
    Plant Cell Jul 2014, 26 (7) 2889-2904; DOI: https://doi.org/10.1105/tpc.114.127993

    Al toxicity is a major constraint to crop production in acidic soil worldwide. This study elucidates how Al may regulate root growth inhibition through mediating local auxin biosynthesis and signaling in the root-apex transition zone and provides insights into how environmental cues affect root growth plasticity through influencing local auxin biosynthesis and signaling.

  • <em>Arabidopsis</em> DELLA and Two HD-ZIP Transcription Factors Regulate GA Signaling in the Epidermis through the L1 Box <em>cis</em>-Element
    You have accessRestricted Access
    Arabidopsis DELLA and Two HD-ZIP Transcription Factors Regulate GA Signaling in the Epidermis through the L1 Box cis-Element
    Belén Rombolá-Caldentey, Paloma Rueda-Romero, Raquel Iglesias-Fernández, Pilar Carbonero, Luis Oñate-Sánchez
    Plant Cell Jul 2014, 26 (7) 2905-2919; DOI: https://doi.org/10.1105/tpc.114.127647

    This work analyzes gene regulatory networks involved in GA responses by focusing on a lipase gene (LIP1) expressed in the epidermis during germination. The results support a model in which GA mediates the activation of downstream target genes containing L1 box sequences in their promoters by releasing two HD-ZIP TFs (ATML1 and PDF2) from their inhibitory interaction with DELLA proteins.

  • DELLAs Function as Coactivators of GAI-ASSOCIATED FACTOR1 in Regulation of Gibberellin Homeostasis and Signaling in <em>Arabidopsis</em>
    Open Access
    DELLAs Function as Coactivators of GAI-ASSOCIATED FACTOR1 in Regulation of Gibberellin Homeostasis and Signaling in Arabidopsis
    Jutarou Fukazawa, Hiroshi Teramura, Satoru Murakoshi, Kei Nasuno, Naotaka Nishida, Takeshi Ito, Michiteru Yoshida, Yuji Kamiya, Shinjiro Yamaguchi, Yohsuke Takahashi
    Plant Cell Jul 2014, 26 (7) 2920-2938; DOI: https://doi.org/10.1105/tpc.114.125690

    This work reports the discovery of the DELLA-binding transcription factor GAF1 and shows that DELLAs and TPR act as coactivators and a corepressor with GAF1, respectively. GA converts the GAF1 complex from transcriptional activator to repressor via degradation of DELLAs. Accordingly, DELLAs turn on or off two sets of GA-regulated genes by dual functions, namely titration and coactivation.

  • The Cysteine Protease CEP1, a Key Executor Involved in Tapetal Programmed Cell Death, Regulates Pollen Development in <em>Arabidopsis</em>
    Open Access
    The Cysteine Protease CEP1, a Key Executor Involved in Tapetal Programmed Cell Death, Regulates Pollen Development in Arabidopsis
    Dandan Zhang, Di Liu, Xiaomeng Lv, Ying Wang, Zhili Xun, Zhixiong Liu, Fenglan Li, Hai Lu
    Plant Cell Jul 2014, 26 (7) 2939-2961; DOI: https://doi.org/10.1105/tpc.114.127282

    Arabidopsis thaliana papain-like cysteine protease, CEP1, is a crucial executor that participates directly in tapetal cell wall hydrolysis and secretory structure formation during tapetal cell programmed cell death. Correct expression of CEP1 in the tapetum is necessary for timely tapetal cell degeneration and functional pollen formation.

  • The Boron Efflux Transporter ROTTEN EAR Is Required for Maize Inflorescence Development and Fertility
    Open Access
    The Boron Efflux Transporter ROTTEN EAR Is Required for Maize Inflorescence Development and Fertility
    Mithu Chatterjee, Zara Tabi, Mary Galli, Simon Malcomber, Amy Buck, Michael Muszynski, Andrea Gallavotti
    Plant Cell Jul 2014, 26 (7) 2962-2977; DOI: https://doi.org/10.1105/tpc.114.125963

    This work reports the isolation and characterization of a mutant called rotten ear (rte), which shows growth and fertility defects in maize inflorescences. rte is required for the uptake and transport of the micronutrient boron and is necessary for the structural integrity of maize cell walls.

  • Transport of Boron by the <em>tassel-less1</em> Aquaporin Is Critical for Vegetative and Reproductive Development in Maize
    Open Access
    Transport of Boron by the tassel-less1 Aquaporin Is Critical for Vegetative and Reproductive Development in Maize
    Amanda R. Durbak, Kimberly A. Phillips, Sharon Pike, Malcolm A. O’Neill, Jonathan Mares, Andrea Gallavotti, Simon T. Malcomber, Walter Gassmann, Paula McSteen
    Plant Cell Jul 2014, 26 (7) 2978-2995; DOI: https://doi.org/10.1105/tpc.114.125898

    Identification and analysis of the maize boron (B) transporter mutant tassel-less1 demonstrated that the primary symptoms of B deficiency are defects in vegetative and reproductive meristems, thus providing an explanation for the reductions in yield observed under B-limited conditions.

  • The Structure of the Catalytic Domain of a Plant Cellulose Synthase and Its Assembly into Dimers
    Open Access
    The Structure of the Catalytic Domain of a Plant Cellulose Synthase and Its Assembly into Dimers
    Anna T. Olek, Catherine Rayon, Lee Makowski, Hyung Rae Kim, Peter Ciesielski, John Badger, Lake N. Paul, Subhangi Ghosh, Daisuke Kihara, Michael Crowley, Michael E. Himmel, Jeffrey T. Bolin, Nicholas C. Carpita
    Plant Cell Jul 2014, 26 (7) 2996-3009; DOI: https://doi.org/10.1105/tpc.114.126862

    Small-angle x-ray scattering gives a glimpse at the solution structure of the catalytic domains of plant cellulose synthase and their dimerization. Dimerization through the plant-specific sequences of the catalytic domain provides important clues for how Zn-finger domains couple these fundamental scaffold units into large, multimeric synthase complexes.

  • <em>Arabidopsis</em> and Maize RidA Proteins Preempt Reactive Enamine/Imine Damage to Branched-Chain Amino Acid Biosynthesis in Plastids
    Open Access
    Arabidopsis and Maize RidA Proteins Preempt Reactive Enamine/Imine Damage to Branched-Chain Amino Acid Biosynthesis in Plastids
    Thomas D. Niehaus, Thuy N.D. Nguyen, Satinder K. Gidda, Mona ElBadawi-Sidhu, Jennifer A. Lambrecht, Donald R. McCarty, Diana M. Downs, Arthur J.L. Cooper, Oliver Fiehn, Robert T. Mullen, Andrew D. Hanson
    Plant Cell Jul 2014, 26 (7) 3010-3022; DOI: https://doi.org/10.1105/tpc.114.126854

    Plant RidA proteins protect an enzyme of branched-chain amino acid biosynthesis from inactivation by hydrolyzing reactive pathway intermediates before they can damage the enzyme. RidA proteins are thus crucial for the efficient biosynthesis of branched-chain amino acids in plants and provide an iconic example of the preemption of metabolite damage.

  • Cytosolic Phosphorylating Glyceraldehyde-3-Phosphate Dehydrogenases Affect <em>Arabidopsis</em> Cellular Metabolism and Promote Seed Oil Accumulation
    You have accessRestricted Access
    Cytosolic Phosphorylating Glyceraldehyde-3-Phosphate Dehydrogenases Affect Arabidopsis Cellular Metabolism and Promote Seed Oil Accumulation
    Liang Guo, Fangfang Ma, Fang Wei, Brian Fanella, Doug K. Allen, Xuemin Wang
    Plant Cell Jul 2014, 26 (7) 3023-3035; DOI: https://doi.org/10.1105/tpc.114.126946

    Genetic alterations of the cytosolic, phosphorylating glyceraldehyde-3-phosphate dehydrogenase, GAPC, have substantial impacts on the overall cellular production of reductants, energy, and carbohydrate metabolites as well as seed production. Increased GAPC expression contributes to enhanced seed oil accumulation.

  • Combined Increases in Mitochondrial Cooperation and Oxygen Photoreduction Compensate for Deficiency in Cyclic Electron Flow in <em>Chlamydomonas reinhardtii</em>
    Open Access
    Combined Increases in Mitochondrial Cooperation and Oxygen Photoreduction Compensate for Deficiency in Cyclic Electron Flow in Chlamydomonas reinhardtii
    Kieu-Van Dang, Julie Plet, Dimitri Tolleter, Martina Jokel, Stéphan Cuiné, Patrick Carrier, Pascaline Auroy, Pierre Richaud, Xenie Johnson, Jean Alric, Yagut Allahverdiyeva, Gilles Peltier
    Plant Cell Jul 2014, 26 (7) 3036-3050; DOI: https://doi.org/10.1105/tpc.114.126375

    Contribution of cyclic electron flow to photosynthesis and biomass productivity is explored in a Chlamydomonas reinhardtii PGRL1-deficient mutant. Induction of different mechanisms, including cooperation between photosynthesis and mitochondrial respiration and oxygen photoreduction (direct or flavodiiron-mediated), efficiently compensates for the deficit in ATP supply under steady state, but not under transient or fluctuating conditions.

  • Nanodomains of Cytochrome <em>b</em><sub>6</sub><em>f</em> and Photosystem II Complexes in Spinach Grana Thylakoid Membranes
    Open Access
    Nanodomains of Cytochrome b6f and Photosystem II Complexes in Spinach Grana Thylakoid Membranes
    Matthew P. Johnson, Cvetelin Vasilev, John D. Olsen, C. Neil Hunter
    Plant Cell Jul 2014, 26 (7) 3051-3061; DOI: https://doi.org/10.1105/tpc.114.127233

    Colocalization of cytochrome b6f and photosystem II complexes creates nanodomains that facilitate rapid exchange of the lipophilic electron carrier plastoquinone in the crowded thylakoid grana membrane.

  • Insights into the Localization and Function of the Membrane Trafficking Regulator GNOM ARF-GEF at the Golgi Apparatus in <em>Arabidopsis</em>
    You have accessRestricted Access
    Insights into the Localization and Function of the Membrane Trafficking Regulator GNOM ARF-GEF at the Golgi Apparatus in Arabidopsis
    Satoshi Naramoto, Marisa S. Otegui, Natsumaro Kutsuna, Riet de Rycke, Tomoko Dainobu, Michael Karampelias, Masaru Fujimoto, Elena Feraru, Daisuke Miki, Hiroo Fukuda, Akihiko Nakano, Jiří Friml
    Plant Cell Jul 2014, 26 (7) 3062-3076; DOI: https://doi.org/10.1105/tpc.114.125880

    This work presents a model of the plant intracellular trafficking system developed by analyzing the subcellular localization of GNOM ARF-GEF, which is crucial for auxin transport-mediated plant development. The data show that GNOM is associated with Golgi body, rather than endosomes as previously believed, and redefine our notions about the identity and function of recycling endosomes in plants.

  • Direct Phosphorylation and Activation of a Mitogen-Activated Protein Kinase by a Calcium-Dependent Protein Kinase in Rice
    You have accessRestricted Access
    Direct Phosphorylation and Activation of a Mitogen-Activated Protein Kinase by a Calcium-Dependent Protein Kinase in Rice
    Kabin Xie, Jianping Chen, Qin Wang, Yinong Yang
    Plant Cell Jul 2014, 26 (7) 3077-3089; DOI: https://doi.org/10.1105/tpc.114.126441

    This study reveals a novel mechanism that regulates the mitogen-activated protein kinase (MAPK) cascade by a calcium-dependent protein kinase (CDPK) in land plants. The finding provides insight into the crosstalk mechanism between the CDPK and MAPK pathways and identifies a role for this mechanism in stress signal transduction and plant immunity.

  • Uric Acid Accumulation in an <em>Arabidopsis</em> Urate Oxidase Mutant Impairs Seedling Establishment by Blocking Peroxisome Maintenance
    You have accessRestricted Access
    Uric Acid Accumulation in an Arabidopsis Urate Oxidase Mutant Impairs Seedling Establishment by Blocking Peroxisome Maintenance
    Oliver K. Hauck, Jana Scharnberg, Nieves Medina Escobar, Gerhard Wanner, Patrick Giavalisco, Claus-Peter Witte
    Plant Cell Jul 2014, 26 (7) 3090-3100; DOI: https://doi.org/10.1105/tpc.114.124008

    Arabidopsis seeds with a mutation in urate oxidase show a defect in germination, fail to develop the cotyledons, and exhibit partially blocked β-oxidation. These phenotypes result from the accumulation of uric acid and are suppressed by the additional mutation of xanthine dehydrogenase, which prevents uric acid accumulation. The data presented show that peroxisome maintenance is compromised by uric acid.

  • Phylobiochemical Characterization of Class-Ib Aspartate/Prephenate Aminotransferases Reveals Evolution of the Plant Arogenate Phenylalanine Pathway
    You have accessRestricted Access
    Phylobiochemical Characterization of Class-Ib Aspartate/Prephenate Aminotransferases Reveals Evolution of the Plant Arogenate Phenylalanine Pathway
    Camilla Dornfeld, Alexandra J. Weisberg, Ritesh K C, Natalia Dudareva, John G. Jelesko, Hiroshi A. Maeda
    Plant Cell Jul 2014, 26 (7) 3101-3114; DOI: https://doi.org/10.1105/tpc.114.127407

    Plants use phenylalanine to produce abundant and diverse phenylpropanoid compounds, such as flavonoids, tannins, and lignin. Through phylogenetic, bioinformatic, and biochemical analyses of prephenate aminotransferase enzymes from deep taxonomic lineages, this study revealed unique evolutionary history and molecular changes of key enzymes responsible for phenylalanine biosynthesis in plants.

  • <em>Arabidopsis</em> MSL10 Has a Regulated Cell Death Signaling Activity That Is Separable from Its Mechanosensitive Ion Channel Activity
    You have accessRestricted Access
    Arabidopsis MSL10 Has a Regulated Cell Death Signaling Activity That Is Separable from Its Mechanosensitive Ion Channel Activity
    Kira M. Veley, Grigory Maksaev, Elizabeth M. Frick, Emma January, Sarah C. Kloepper, Elizabeth S. Haswell
    Plant Cell Jul 2014, 26 (7) 3115-3131; DOI: https://doi.org/10.1105/tpc.114.128082

    MscS-Like 10, a mechanosensitive ion channel from Arabidopsis, has two functions, each attributable to a different domain of the protein. The C-terminal domain, which is conserved among all MscS-Like ion channels, mediates tension-regulated ion flux. The plant-specific N-terminal domain is capable of inducing cell death, and its activity is negatively regulated by its phosphorylation.

  • <em>Arabidopsis</em> SNAREs SYP61 and SYP121 Coordinate the Trafficking of Plasma Membrane Aquaporin PIP2;7 to Modulate the Cell Membrane Water Permeability
    You have accessRestricted Access
    Arabidopsis SNAREs SYP61 and SYP121 Coordinate the Trafficking of Plasma Membrane Aquaporin PIP2;7 to Modulate the Cell Membrane Water Permeability
    Charles Hachez, Timothée Laloux, Hagen Reinhardt, Damien Cavez, Hervé Degand, Christopher Grefen, Riet De Rycke, Dirk Inzé, Michael R. Blatt, Eugenia Russinova, François Chaumont
    Plant Cell Jul 2014, 26 (7) 3132-3147; DOI: https://doi.org/10.1105/tpc.114.127159

    This work shows that the post-Golgi trafficking of PIP2;7 involves an interaction with SYP61 and SYP121 and that SYP61 and SYP121 colocalize and are physically associated in a SNARE complex. These findings suggest that SNAREs, and possibly a SYP61/SYP121 SNARE complex, play an important role in the regulation of the transport of the plasma membrane aquaporin.

  • The Ubiquitous Distribution of Late Embryogenesis Abundant Proteins across Cell Compartments in <em>Arabidopsis</em> Offers Tailored Protection against Abiotic Stress
    Open Access
    The Ubiquitous Distribution of Late Embryogenesis Abundant Proteins across Cell Compartments in Arabidopsis Offers Tailored Protection against Abiotic Stress
    Adrien Candat, Gaël Paszkiewicz, Martine Neveu, Romain Gautier, David C. Logan, Marie-Hélène Avelange-Macherel, David Macherel
    Plant Cell Jul 2014, 26 (7) 3148-3166; DOI: https://doi.org/10.1105/tpc.114.127316

    LEA proteins accumulate in plant seeds prior to maturation drying, and some have been shown to protect membranes from desiccation. This work demonstrates the subcellular distribution of each of 51 Arabidopsis LEA proteins and suggests protection against desiccation or cold stress is tailored for each cellular compartment.

  • Closely Related NAC Transcription Factors of Tomato Differentially Regulate Stomatal Closure and Reopening during Pathogen Attack
    Open Access
    Closely Related NAC Transcription Factors of Tomato Differentially Regulate Stomatal Closure and Reopening during Pathogen Attack
    Minmin Du, Qingzhe Zhai, Lei Deng, Shuyu Li, Hongshuang Li, Liuhua Yan, Zhuo Huang, Bao Wang, Hongling Jiang, Tingting Huang, Chang-Bao Li, Jianing Wei, Le Kang, Jingfu Li, Chuanyou Li
    Plant Cell Jul 2014, 26 (7) 3167-3184; DOI: https://doi.org/10.1105/tpc.114.128272

    This work reports the distinct mechanisms of two homologous NAC proteins of tomato, JA2 and JA2L, in regulating Pseudomonas syringae pv tomato DC3000–induced stomatal movement. Whereas JA2 acts in abscisic acid (ABA)–mediated stomatal closure by promoting ABA biosynthesis, JA2L functions in jasmonate/coronatine–mediated stomatal reopening by suppressing salicylic acid accumulation.

  • Interaction of the <em>Arabidopsis</em> GTPase RabA4c with Its Effector PMR4 Results in Complete Penetration Resistance to Powdery Mildew
    Open Access
    Interaction of the Arabidopsis GTPase RabA4c with Its Effector PMR4 Results in Complete Penetration Resistance to Powdery Mildew
    Dorothea Ellinger, Annemarie Glöckner, Jasmin Koch, Marcel Naumann, Vanessa Stürtz, Kevin Schütt, Chithra Manisseri, Shauna C. Somerville, Christian A. Voigt
    Plant Cell Jul 2014, 26 (7) 3185-3200; DOI: https://doi.org/10.1105/tpc.114.127779

    Unexpectedly, an Arabidopsis RabA family GTPase directly interacted with a pathogen-induced, plasma membrane-bound callose synthase in unchallenged epidermal leaf cells as well as in response to powdery mildew. Overexpression of this Rab GTPase induced enhanced early callose deposition at powdery mildew infection sites and complete penetration resistance to this biotrophic fungus.

  • RETRACTED: The <em>Arabidopsis</em> Malectin-Like Leucine-Rich Repeat Receptor-Like Kinase IOS1 Associates with the Pattern Recognition Receptors FLS2 and EFR and Is Critical for Priming of Pattern-Triggered Immunity
    You have accessRestricted Access
    RETRACTED: The Arabidopsis Malectin-Like Leucine-Rich Repeat Receptor-Like Kinase IOS1 Associates with the Pattern Recognition Receptors FLS2 and EFR and Is Critical for Priming of Pattern-Triggered Immunity
    Ching-Wei Chen, Dario Panzeri, Yu-Hung Yeh, Yasuhiro Kadota, Pin-Yao Huang, Chia-Nan Tao, Milena Roux, Shiao-Chiao Chien, Tzu-Chuan Chin, Po-Wei Chu, Cyril Zipfel, Laurent Zimmerli
    Plant Cell Jul 2014, 26 (7) 3201-3219; DOI: https://doi.org/10.1105/tpc.114.125682

    This work describes the function of the RLK IOS1 in Arabidopsis immunity against bacteria. IOS1 is required for optimal function of the immune receptors FLS2 and EFR and β-aminobutyric acid-induced resistance and priming. IOS1 associates with FLS2, EFR, and BAK1 and controls the ligand-induced FLS2-BAK1 association.

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The Plant Cell Online: 26 (7)
The Plant Cell
Vol. 26, Issue 7
Jul 2014
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