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Table of Contents

The Plant Cell Online: 26 (8)
Aug 2014

IN BRIEF

  • Never Let a Good Crisis Go to Waste: The Kinesin ARK1 Promotes Microtubule Catastrophe during Root Hair Development
    You have accessRestricted Access
    Never Let a Good Crisis Go to Waste: The Kinesin ARK1 Promotes Microtubule Catastrophe during Root Hair Development
    Jennifer Lockhart
    Plant Cell Aug 2014, 26 (8) 3221; DOI: https://doi.org/10.1105/tpc.114.131235
  • Modeling Sugar Metabolism in Tomato Fruit
    You have accessRestricted Access
    Modeling Sugar Metabolism in Tomato Fruit
    Jennifer Mach
    Plant Cell Aug 2014, 26 (8) 3222-3223; DOI: https://doi.org/10.1105/tpc.114.131177

LARGE-SCALE BIOLOGY ARTICLE

  • Model-Assisted Analysis of Sugar Metabolism throughout Tomato Fruit Development Reveals Enzyme and Carrier Properties in Relation to Vacuole Expansion
    You have accessRestricted Access
    Model-Assisted Analysis of Sugar Metabolism throughout Tomato Fruit Development Reveals Enzyme and Carrier Properties in Relation to Vacuole Expansion
    Bertrand P. Beauvoit, Sophie Colombié, Antoine Monier, Marie-Hélène Andrieu, Benoit Biais, Camille Bénard, Catherine Chéniclet, Martine Dieuaide-Noubhani, Christine Nazaret, Jean-Pierre Mazat, Yves Gibon
    Plant Cell Aug 2014, 26 (8) 3224-3242; DOI: https://doi.org/10.1105/tpc.114.127761

    A kinetic model combining enzyme activities and subcellular compartmentation was built to analyze the storage and interconversion of sugars in developing tomato fruit. This work shows that tonoplast carriers, sucrose hydrolysis, and accumulation of organic acids are major contributors to the vacuole expansion and the metabolic reprogramming that occur during early development.

RESEARCH ARTICLES

  • Comparative Transcriptome Atlases Reveal Altered Gene Expression Modules between Two Cleomaceae C<sub>3</sub> and C<sub>4</sub> Plant Species
    Open Access
    Comparative Transcriptome Atlases Reveal Altered Gene Expression Modules between Two Cleomaceae C3 and C4 Plant Species
    Canan Külahoglu, Alisandra K. Denton, Manuel Sommer, Janina Maß, Simon Schliesky, Thomas J. Wrobel, Barbara Berckmans, Elsa Gongora-Castillo, C. Robin Buell, Rüdiger Simon, Lieven De Veylder, Andrea Bräutigam, Andreas P.M. Weber
    Plant Cell Aug 2014, 26 (8) 3243-3260; DOI: https://doi.org/10.1105/tpc.114.123752

    Transcriptome atlases of Tarenaya hassleriana, a C3 plant, and the C4-species Gynandropsis gynandra were developed. Integrated analysis of RNA-seq and leaf anatomical data indicates altered regulation of the cell cycle and endoreduplication during the establishment of C4 leaf anatomy. C4 genes have been recruited to photosynthetic gene expression regulation from ancestral nonphotosynthetic functions in C3.

  • eQTL Mapping of Transposon Silencing Reveals a Position-Dependent Stable Escape from Epigenetic Silencing and Transposition of <em>AtMu1</em> in the <em>Arabidopsis</em> Lineage
    You have accessRestricted Access
    eQTL Mapping of Transposon Silencing Reveals a Position-Dependent Stable Escape from Epigenetic Silencing and Transposition of AtMu1 in the Arabidopsis Lineage
    Tina Kabelitz, Christian Kappel, Kirstin Henneberger, Eileen Benke, Christiane Nöh, Isabel Bäurle
    Plant Cell Aug 2014, 26 (8) 3261-3271; DOI: https://doi.org/10.1105/tpc.114.128512

    This article describes mapping and molecular analysis of the differential transcriptional activity of a MULE1 DNA transposon in two commonly used lab strains. The study is expanded to over 200 accessions to describe the overall polymorphism of this transposon in the Arabidopsis lineage. This study provides insight into natural variation of transposon silencing.

  • Analysis of Natural and Induced Variation in Tomato Glandular Trichome Flavonoids Identifies a Gene Not Present in the Reference Genome
    Open Access
    Analysis of Natural and Induced Variation in Tomato Glandular Trichome Flavonoids Identifies a Gene Not Present in the Reference Genome
    Jeongwoon Kim, Yuki Matsuba, Jing Ning, Anthony L. Schilmiller, Dagan Hammar, A. Daniel Jones, Eran Pichersky, Robert L. Last
    Plant Cell Aug 2014, 26 (8) 3272-3285; DOI: https://doi.org/10.1105/tpc.114.129460

    Analysis of genomic resources, genetics, and biochemistry identified Sl-MOMT4 as a flavonol 3′ O-methyltransferase involved in the production of methylated flavonoids in glandular trichomes of the M82 cultivated tomato. This gene is missing in the tomato Heinz 1706 reference genome and represents an example of fast evolution of specialized metabolism genes among cultivated tomato varieties.

  • Production of Bioactive Diterpenoids in the Euphorbiaceae Depends on Evolutionarily Conserved Gene Clusters
    Open Access
    Production of Bioactive Diterpenoids in the Euphorbiaceae Depends on Evolutionarily Conserved Gene Clusters
    Andrew J. King, Geoffrey D. Brown, Alison D. Gilday, Tony R. Larson, Ian A. Graham
    Plant Cell Aug 2014, 26 (8) 3286-3298; DOI: https://doi.org/10.1105/tpc.114.129668

    The Euphorbiaceae produce a wide range of biologically active diterpenoids. Using castor (Ricinus communis) as a model, this work provides evidence that some of the genes required for the biosynthesis of these diterpenoids are arranged in physical gene clusters and describes a conserved oxidation step required for biosynthesis of a majority of diterpenoids that has been reported in this family.

  • Pollen-Specific Activation of <em>Arabidopsis</em> Retrogenes Is Associated with Global Transcriptional Reprogramming
    Open Access
    Pollen-Specific Activation of Arabidopsis Retrogenes Is Associated with Global Transcriptional Reprogramming
    Ahmed Abdelsamad, Ales Pecinka
    Plant Cell Aug 2014, 26 (8) 3299-3313; DOI: https://doi.org/10.1105/tpc.114.126011

    This study shows that 1% of Arabidopsis protein-coding genes are retrogenes (i.e., cDNAs integrated into the genome) and that retrogenes frequently acquire novel promoters at their insertion sites and are transcribed preferentially in male gametes. Thus, RNA-based gene duplication is a common process in plant genome evolution and generates functional genes with specific transcription patterns.

  • Identification of a Sphingolipid α-Glucuronosyltransferase That Is Essential for Pollen Function in <em>Arabidopsis</em>
    Open Access
    Identification of a Sphingolipid α-Glucuronosyltransferase That Is Essential for Pollen Function in Arabidopsis
    Emilie A. Rennie, Berit Ebert, Godfrey P. Miles, Rebecca E. Cahoon, Katy M. Christiansen, Solomon Stonebloom, Hoda Khatab, David Twell, Christopher J. Petzold, Paul D. Adams, Paul Dupree, Joshua L. Heazlewood, Edgar B. Cahoon, Henrik Vibe Scheller
    Plant Cell Aug 2014, 26 (8) 3314-3325; DOI: https://doi.org/10.1105/tpc.114.129171

    This study found that IPUT1 is an enzyme required for the biosynthesis of glycosyl inositol phosphorylceramide sphingolipids in plants. These glycolipids are highly abundant and have many important cellular roles. IPUT1 adds glucuronic acid residues to the lipids. When the glucuronic acid residues are not incorporated in the sphingolipids, the pollen is unable to mediate fertilization.

  • The <em>Arabidopsis</em> 14-3-3 Protein RARE COLD INDUCIBLE 1A Links Low-Temperature Response and Ethylene Biosynthesis to Regulate Freezing Tolerance and Cold Acclimation
    You have accessRestricted Access
    The Arabidopsis 14-3-3 Protein RARE COLD INDUCIBLE 1A Links Low-Temperature Response and Ethylene Biosynthesis to Regulate Freezing Tolerance and Cold Acclimation
    Rafael Catalá, Rosa López-Cobollo, M. Mar Castellano, Trinidad Angosto, José M. Alonso, Joseph R. Ecker, Julio Salinas
    Plant Cell Aug 2014, 26 (8) 3326-3342; DOI: https://doi.org/10.1105/tpc.114.127605

    The Arabidopsis 14-3-3 RCI1A protein plays a critical role in freezing tolerance, partially through an ethylene-dependent signaling pathway. RCI1A interacts with different ACS isoforms to regulate the levels of ethylene that are necessary to promote accurate cold-induced gene expression and freezing tolerance under both control and low-temperature conditions.

  • A Mitogen-Activated Protein Kinase Cascade Module, MKK3-MPK6 and MYC2, Is Involved in Blue Light-Mediated Seedling Development in <em>Arabidopsis</em>
    You have accessRestricted Access
    A Mitogen-Activated Protein Kinase Cascade Module, MKK3-MPK6 and MYC2, Is Involved in Blue Light-Mediated Seedling Development in Arabidopsis
    Vishmita Sethi, Badmi Raghuram, Alok Krishna Sinha, Sudip Chattopadhyay
    Plant Cell Aug 2014, 26 (8) 3343-3357; DOI: https://doi.org/10.1105/tpc.114.128702

    The connection between the MAP kinase cascade and light signaling is unknown. This work shows that the MKK3-MPK6 is activated by blue light in a MYC2-dependent manner during Arabidopsis seedling development. MPK6 physically interacts and phosphorylates MYC2, which in turn binds to the promoter of MPK6 and regulates its expression in a feedback mechanism under blue light signaling.

  • Manipulation of Mitogen-Activated Protein Kinase Kinase Signaling in the <em>Arabidopsis</em> Stomatal Lineage Reveals Motifs That Contribute to Protein Localization and Signaling Specificity
    Open Access
    Manipulation of Mitogen-Activated Protein Kinase Kinase Signaling in the Arabidopsis Stomatal Lineage Reveals Motifs That Contribute to Protein Localization and Signaling Specificity
    Gregory R. Lampard, Diego L. Wengier, Dominique C. Bergmann
    Plant Cell Aug 2014, 26 (8) 3358-3371; DOI: https://doi.org/10.1105/tpc.114.127415

    Expression of Arabidopsis MKK domain deletion variants in three discrete epidermal cell types, coupled with in vitro kinase assays, revealed regions of MKKs that promote signal propagation and regulate protein subcellular localization. Subcellular localization associated with a subset of MKK7/9 functions sheds light onto how signaling specificity is achieved.

  • The Microtubule Plus-End Tracking Protein ARMADILLO-REPEAT KINESIN1 Promotes Microtubule Catastrophe in <em>Arabidopsis</em>
    Open Access
    The Microtubule Plus-End Tracking Protein ARMADILLO-REPEAT KINESIN1 Promotes Microtubule Catastrophe in Arabidopsis
    Ryan Christopher Eng, Geoffrey O. Wasteneys
    Plant Cell Aug 2014, 26 (8) 3372-3386; DOI: https://doi.org/10.1105/tpc.114.126789

    This work determines that the ARMADILLO-REPEAT KINESIN1 (ARK1) of Arabidopsis accumulates at the plus ends of growing microtubules and promotes microtubule catastrophe. By inducing such events, ARK1 enables the recycling of tubulin subunits, which is important for maintaining rapid microtubule polymerization, a process that is critical for maintaining unidirectional tip growth in root hairs.

  • The Os-AKT1 Channel Is Critical for K<sup>+</sup> Uptake in Rice Roots and Is Modulated by the Rice CBL1-CIPK23 Complex
    Open Access
    The Os-AKT1 Channel Is Critical for K+ Uptake in Rice Roots and Is Modulated by the Rice CBL1-CIPK23 Complex
    Juan Li, Yu Long, Guo-Ning Qi, Juan Li, Zi-Jian Xu, Wei-Hua Wu, Yi Wang
    Plant Cell Aug 2014, 26 (8) 3387-3402; DOI: https://doi.org/10.1105/tpc.114.123455

    This work shows that the transport activity of the Shaker K+ channel Os-AKT1, which mediates K+ uptake in rice roots and influences grain yield, is modulated by Os-CBL1 and Os-CIPK23 proteins. These findings provide insight promoting efforts to improve rice K+ uptake efficiency and enhance rice tolerance to K+-deficiency stress.

  • The ABC Transporter ABCG1 Is Required for Suberin Formation in Potato Tuber Periderm
    You have accessRestricted Access
    The ABC Transporter ABCG1 Is Required for Suberin Formation in Potato Tuber Periderm
    Ramona Landgraf, Ulrike Smolka, Simone Altmann, Lennart Eschen-Lippold, Melanie Senning, Sophia Sonnewald, Benjamin Weigel, Nadezhda Frolova, Nadine Strehmel, Gerd Hause, Dierk Scheel, Christoph Böttcher, Sabine Rosahl
    Plant Cell Aug 2014, 26 (8) 3403-3415; DOI: https://doi.org/10.1105/tpc.114.124776

    The water barrier function of potato tuber skin depends on the polyester suberin and associated waxes. Here, a transporter was identified that is required for the formation of suberin in potato tuber periderm; potato plants lacking this transporter give rise to tubers that are more prone to water loss.

  • Dynamics of Vacuoles and H<sup>+</sup>-Pyrophosphatase Visualized by Monomeric Green Fluorescent Protein in <em>Arabidopsis</em>: Artifactual Bulbs and Native Intravacuolar Spherical Structures
    Open Access
    Dynamics of Vacuoles and H+-Pyrophosphatase Visualized by Monomeric Green Fluorescent Protein in Arabidopsis: Artifactual Bulbs and Native Intravacuolar Spherical Structures
    Shoji Segami, Sachi Makino, Ai Miyake, Mariko Asaoka, Masayoshi Maeshima
    Plant Cell Aug 2014, 26 (8) 3416-3434; DOI: https://doi.org/10.1105/tpc.114.127571

    In this work, expressing monomeric green fluorescent protein (GFP)-linked vacuolar H+-pyrophosphatase (H+-PPase) under the control of its own promoter revealed dynamic morphological changes in vacuoles and tonoplasts and tissue-specific expression patterns of H+-PPase. However, weak homodimerization of highly expressed GFP-tagged protein triggered the generation of artifactual bulbs in plant cells.

  • Functional Characterization of the Small Regulatory Subunit PetP from the Cytochrome <em>b<sub>6</sub>f</em> Complex in <em>Thermosynechococcus elongatus</em>
    You have accessRestricted Access
    Functional Characterization of the Small Regulatory Subunit PetP from the Cytochrome b6f Complex in Thermosynechococcus elongatus
    Sascha Rexroth, Dorothea Rexroth, Sebastian Veit, Nicole Plohnke, Kai U. Cormann, Marc M. Nowaczyk, Matthias Rögner
    Plant Cell Aug 2014, 26 (8) 3435-3448; DOI: https://doi.org/10.1105/tpc.114.125930

    Successful isolation of a highly active b6f complex including the PetP subunit allowed detailed analysis of the function of this recently discovered subunit. PetP appears to promote the stability and activity of the b6f complex and to influence linear electron transport.

  • Loss of Ceramide Kinase in <em>Arabidopsis</em> Impairs Defenses and Promotes Ceramide Accumulation and Mitochondrial H<sub>2</sub>O<sub>2</sub> Bursts
    You have accessRestricted Access
    Loss of Ceramide Kinase in Arabidopsis Impairs Defenses and Promotes Ceramide Accumulation and Mitochondrial H2O2 Bursts
    Fang-Cheng Bi, Zhe Liu, Jian-Xin Wu, Hua Liang, Xue-Li Xi, Ce Fang, Tie-Jun Sun, Jian Yin, Guang-Yi Dai, Chan Rong, Jean T. Greenberg, Wei-Wei Su, Nan Yao
    Plant Cell Aug 2014, 26 (8) 3449-3467; DOI: https://doi.org/10.1105/tpc.114.127050

    Loss of ceramide kinase in Arabidopsis causes altered temporal and/or spatial accumulation of sphingolipids and hydrogen peroxide along with increased cell death and fungal pathogen growth (Botrytis cinerea) prior to cell death. Thus, the balance of ceramides and/or the loss of ceramide phosphate are implicated in cell death control and in interactions with Botrytis cinerea during early stages of infection.

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The Plant Cell Online: 26 (8)
The Plant Cell
Vol. 26, Issue 8
Aug 2014
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