THE PLANT CELL ONLINE -- Table of Contents (22 [1])

HOME

HELP

FEEDBACK

SUBSCRIPTIONS

IN BRIEF:

Physcomitrella Reveals a Key Role for Stromal Hsp70 Chaperones in Chloroplast Protein Import: Nancy A. Eckardt; Plant Cell 2010 22: 1. First Published on January 8, 2010; doi:10.1105/tpc.109.220110; [Full Text] [PDF]

Retrotransposon Domain Swapping: Jennifer Mach; Plant Cell 2010 22: 2. First Published on January 15, 2010; doi:10.1105/tpc.109.220111; [Full Text] [PDF]

A Double Lock on Polyploidy-Associated Epigenetic Gene Silencing: Nancy A. Eckardt; Plant Cell 2010 22: 3. First Published on January 22, 2010; doi:10.1105/tpc.110.220112; [Full Text] [PDF]

REVIEW ARTICLES:

Evolutionary Studies Illuminate the Structural-Functional Model of Plant Phytochromes: Sarah Mathews; Plant Cell 2010 22: 4-16. First Published on January 29, 2010; doi:10.1105/tpc.109.072280; [Abstract] [Full Text] [PDF] [Supplemental Data]

RESEARCH ARTICLES:

Global Epigenetic and Transcriptional Trends among Two Rice Subspecies and Their Reciprocal Hybrids: Guangming He, Xiaopeng Zhu, Axel A. Elling, Liangbi Chen, Xiangfeng Wang, Lan Guo, Manzhong Liang, Hang He, Huiyong Zhang, Fangfang Chen, Yijun Qi, Runsheng Chen, and Xing-Wang Deng; Plant Cell 2010 22: 17-33. First Published on January 19, 2010; doi:10.1105/tpc.109.072041; This work examines the molecular basis of heterosis by comprehensively describing the epigenetic modifications and transcriptional output, including both mRNA and small RNAs, of two rice subspecies and their reciprocal hybrids.; [Abstract] [Full Text] [PDF] [Supplemental Data]

Cooperation of Multiple Chromatin Modifications Can Generate Unanticipated Stability of Epigenetic States in Arabidopsis: Tuncay Baubec, Huy Q. Dinh, Ales Pecinka, Branislava Rakic, Wilfried Rozhon, Bonnie Wohlrab, Arndt von Haeseler, and Ortrun Mittelsten Scheid; Plant Cell 2010 22: 34-47. First Published on January 22, 2010; doi:10.1105/tpc.109.072819; Make assurance double sure: Two chromatin modifications join forces to create a double lock and need to be removed simultaneously to reactivate a heritable epiallele originating from polyploid Arabidopsis.; [Abstract] [Full Text] [PDF] [Supplemental Data][Author Profile] OPEN ACCESS ARTICLE

Bifurcation and Enhancement of Autonomous-Nonautonomous Retrotransposon Partnership through LTR Swapping in Soybean: Jianchang Du, Zhixi Tian, Nathan J. Bowen, Jeremy Schmutz, Randy C. Shoemaker, and Jianxin Ma; Plant Cell 2010 22: 48-61. First Published on January 15, 2010; doi:10.1105/tpc.109.068775; This work demonstrates that region-specific interelement recombinational exchange, behind natural selection, plays a primary role in maintaining preexisting partnership and establishing new partnership between nonautonomous and autonomous long terminal repeat retrotransposons in soybean.; [Abstract] [Full Text] [PDF] [Supplemental Data][Author Profile]

BLADE-ON-PETIOLE1 Coordinates Organ Determinacy and Axial Polarity in Arabidopsis by Directly Activating ASYMMETRIC LEAVES2: Ji Hyung Jun, Chan Man Ha, and Jennifer C. Fletcher; Plant Cell 2010 22: 62-76. First Published on January 29, 2010; doi:10.1105/tpc.109.070763; This study shows that BOP1 and BOP2 regulate key organogenic events in the proximal region of cotyledon and leaf primordia. Direct activation of AS2 transcription by BOP1 and BOP2 is found to be required for KNOX1 gene repression at the leaf base and may represent a conserved mechanism for coordinating leaf morphogenesis with patterning along the adaxial-abaxial and the proximal-distal axes.; [Abstract] [Full Text] [PDF] [Supplemental Data]

The Plastid Isoform of Triose Phosphate Isomerase Is Required for the Postgerminative Transition from Heterotrophic to Autotrophic Growth in Arabidopsis: Mingjie Chen and Jay J. Thelen; Plant Cell 2010 22: 77-90. First Published on January 22, 2010; doi:10.1105/tpc.109.071837; An Arabidopsis plastid triose phosphate isomerase mutant was reduced in transcript, protein, and activity, resulting in a severely stunted plant at the transition from heterotrophic to autotrophic growth. Accumulation of dihydroxyacetone phosphate and methylglyoxal to toxic levels is proposed as a cause of this phenotype, as exogenous application of these metabolites mimicked the phenotype.; [Abstract] [Full Text] [PDF] [Supplemental Data]

The ABORTED MICROSPORES Regulatory Network Is Required for Postmeiotic Male Reproductive Development in Arabidopsis thaliana: Jie Xu, Caiyun Yang, Zheng Yuan, Dasheng Zhang, Martha Y. Gondwe, Zhiwen Ding, Wanqi Liang, Dabing Zhang, and Zoe A. Wilson; Plant Cell 2010 22: 91-107. First Published on January 29, 2010; doi:10.1105/tpc.109.071803; This study identifies targets and interacting factors of an Arabidopsis basic helix-loop-helix protein, ABORTED MICROSPORES (AMS), which is known to be required for pollen development. AMS is found to regulate the expression of several genes involved in metabolism and pollen wall deposition.; [Abstract] [Full Text] [PDF] [Supplemental Data] OPEN ACCESS ARTICLE

Arabidopsis CULLIN4-Damaged DNA Binding Protein 1 Interacts with CONSTITUTIVELY PHOTOMORPHOGENIC1-SUPPRESSOR OF PHYA Complexes to Regulate Photomorphogenesis and Flowering Time: Haodong Chen, Xi Huang, Giuliana Gusmaroli, William Terzaghi, On Sun Lau, Yuki Yanagawa, Yu Zhang, Jigang Li, Jae-Hoon Lee, Danmeng Zhu, and Xing Wang Deng; Plant Cell 2010 22: 108-123. First Published on January 8, 2010; doi:10.1105/tpc.109.065490; CUL4-DDB1 associates with COP1-SPA complexes via its linker protein DDB1 to regulate photomorphogenesis and possibly also flowering time under short-day conditions. The CUL4-DDB1-COP1-SPA supercomplex may represent a novel group of E3 ligases that functions independently of the CDD complex.; [Abstract] [Full Text] [PDF] [Supplemental Data]

The RAD23 Family Provides an Essential Connection between the 26S Proteasome and Ubiquitylated Proteins in Arabidopsis: Lisa M. Farmer, Adam J. Book, Kwang-Hee Lee, Ya-Ling Lin, Hongyong Fu, and Richard D. Vierstra; Plant Cell 2010 22: 124-142. First Published on January 19, 2010; doi:10.1105/tpc.109.072660; This study describes the collection of UBL/UBA domain proteins in Arabidopsis that participate in the ubiquitin/26S proteasome system, with a focus on the RAD23 family. The data point to a specific role for RAD23s in plants and suggest that the four isoforms have both redundant and unique roles in Arabidopsis development by helping shuttle ubiquitin conjugates to the 26S proteasome.; [Abstract] [Full Text] [PDF] [Supplemental Data]

Auxin-Mediated Ribosomal Biogenesis Regulates Vacuolar Trafficking in Arabidopsis: Abel Rosado, Eun Ju Sohn, Georgia Drakakaki, Songqin Pan, Alexandra Swidergal, Yuqing Xiong, Byung-Ho Kang, Ray A. Bressan, and Natasha V. Raikhel; Plant Cell 2010 22: 143-158. First Published on January 8, 2010; doi:10.1105/tpc.109.068320; This study describes the function of RPL4A, a ribosomal protein. It finds a link between ribosomal biogenesis and vacuolar protein sorting and provides insights into the auxin-mediated regulation of vacuolar trafficking in metabolically active tissues.; [Abstract] [Full Text] [PDF] [Supplemental Data]

Loss-of-Function Mutations of Retromer Large Subunit Genes Suppress the Phenotype of an Arabidopsis zig Mutant That Lacks Qb-SNARE VTI11: Yasuko Hashiguchi, Mitsuru Niihama, Tetsuya Takahashi, Chieko Saito, Akihiko Nakano, Masao Tasaka, and Miyo Terao Morita; Plant Cell 2010 22: 159-172. First Published on January 19, 2010; doi:10.1105/tpc.109.069294; This work shows that loss-of-function mutants of retromer large subunit genes ZIP3/VPS35a, VPS29, and VPS26a partially suppressed the defects in morphology and gravitropism of zig mutants. By contrast, mutations of the paralogous genes VPS35b, VPS35c, and VPS26b do not suppress zig. Functional differences among these paralogous genes suggest that VPS35A function differs from that of VPS35B or VPS35C.; [Abstract] [Full Text] [PDF] [Supplemental Data]

Cytochrome P450 Family Member CYP704B2 Catalyzes the ${omega}$ -Hydroxylation of Fatty Acids and Is Required for Anther Cutin Biosynthesis and Pollen Exine Formation in Rice: Hui Li, Franck Pinot, Vincent Sauveplane, Danièle Werck-Reichhart, Patrik Diehl, Lukas Schreiber, Rochus Franke, Ping Zhang, Liang Chen, Yawei Gao, Wanqi Liang, and Dabing Zhang; Plant Cell 2010 22: 173-190. First Published on January 19, 2010; doi:10.1105/tpc.109.070326; This work finds that a fatty acid ${omega}$ -hydroxylation pathway in rice that relies on an ancient cytochrome P450 subfamily is essential for the formation of both anther cuticle and pollen exine during plant male reproductive and spore development.; [Abstract] [Full Text] [PDF] [Supplemental Data] OPEN ACCESS ARTICLE

The ${gamma}$ -Tubulin Complex Protein GCP4 Is Required for Organizing Functional Microtubule Arrays in Arabidopsis thaliana: Zhaosheng Kong, Takashi Hotta, Yuh-Ru Julie Lee, Tetsuya Horio, and Bo Liu; Plant Cell 2010 22: 191-204. First Published on January 29, 2010; doi:10.1105/tpc.109.071191; This study demonstrates that ${gamma}$ -Tubulin Complex Protein 4 plays a crucial role in ${gamma}$ -tubulin–mediated microtubule nucleation and organization during cell division and morphogenesis in Arabidopsis.; [Abstract] [Full Text] [PDF] [Supplemental Data]

A Stromal Heat Shock Protein 70 System Functions in Protein Import into Chloroplasts in the Moss Physcomitrella patens: Lan-Xin Shi and Steven M. Theg; Plant Cell 2010 22: 205-220. First Published on January 8, 2010; doi:10.1105/tpc.109.071464; This work uses reverse genetic and biochemical approaches to provide evidence supporting the hypothesis that an Hsp70 system plays a heretofore unrecognized role in chloroplast protein import.; [Abstract] [Full Text] [PDF] [Supplemental Data][Author Profile] OPEN ACCESS ARTICLE

An Arabidopsis Mutant with High Cyclic Electron Flow around Photosystem I (hcef) Involving the NADPH Dehydrogenase Complex: Aaron K. Livingston, Jeffrey A. Cruz, Kaori Kohzuma, Amit Dhingra, and David M. Kramer; Plant Cell 2010 22: 221-233. First Published on January 15, 2010; doi:10.1105/tpc.109.071084; Analysis of a mutant, hcef1, in chloroplast fructose-1,6-bisphosphatase demonstrates that C₃ plants are capable of high steady state fluxes of cyclic electron flow around photosystem I, which is important for chloroplast energy balance and involves the NAD(P)H dehydrogenase, but not the PGR5, pathway.; [Abstract] [Full Text] [PDF] [Supplemental Data] OPEN ACCESS ARTICLE

MRL1, a Conserved Pentatricopeptide Repeat Protein, Is Required for Stabilization of rbcL mRNA in Chlamydomonas and Arabidopsis: Xenie Johnson, Katia Wostrikoff, Giovanni Finazzi, Richard Kuras, Christian Schwarz, Sandrine Bujaldon, Joerg Nickelsen, David B. Stern, Francis-André Wollman, and Olivier Vallon; Plant Cell 2010 22: 234-248. First Published on January 22, 2010; doi:10.1105/tpc.109.066266; The expression of the chloroplast genome requires specialized proteins that are coded in the nucleus and imported into the organelle. We have identified such a protein that binds the leading end of the mRNA for the most abundant chloroplast enzyme. The function of this novel stabilization factor is conserved from green algae to land plants.; [Abstract] [Full Text] [PDF] [Supplemental Data]

The Arabidopsis Prohibitin Gene PHB3 Functions in Nitric Oxide–Mediated Responses and in Hydrogen Peroxide–Induced Nitric Oxide Accumulation: Yong Wang, Amber Ries, Kati Wu, Albert Yang, and Nigel M. Crawford; Plant Cell 2010 22: 249-259. First Published on January 12, 2010; doi:10.1105/tpc.109.072066; Nitric oxide serves as a signal in biotic and abiotic stress responses in plants, yet little is known about its metabolism under aerobic conditions. Using a genetic screen to isolate mutants defective in nitric oxide accumulation, a prohibitin gene was identified that regulates nitric oxide levels and affects stress responses that use nitric oxide signaling.; [Abstract] [Full Text] [PDF] [Supplemental Data]

Tomato 14-3-3 Protein 7 Positively Regulates Immunity-Associated Programmed Cell Death by Enhancing Protein Abundance and Signaling Ability of MAPKKK ${alpha}$: Chang-Sik Oh, Kerry F. Pedley, and Gregory B. Martin; Plant Cell 2010 22: 260-272. First Published on January 8, 2010; doi:10.1105/tpc.109.070664; 14-3-3 proteins bind and regulate phosphorylated client proteins involved in diverse biological processes in eukaryotic organisms. This work reports that a tomato 14-3-3 protein regulates plant immunity by altering the abundance of a positive regulator of cell death.; [Abstract] [Full Text] [PDF] [Supplemental Data]

Jasmonate and ppHsystemin Regulate Key Malonylation Steps in the Biosynthesis of 17-Hydroxygeranyllinalool Diterpene Glycosides, an Abundant and Effective Direct Defense against Herbivores in Nicotiana attenuata: Sven Heiling, Meredith C. Schuman, Matthias Schoettner, Purba Mukerjee, Beatrice Berger, Bernd Schneider, Amir R. Jassbi, and Ian T. Baldwin; Plant Cell 2010 22: 273-292. First Published on January 15, 2010; doi:10.1105/tpc.109.071449; This study describes the biosynthetic dynamics of diterpene glycosides abundant in a wild tobacco and highlights glycosylation and malonylation as key biosynthetic steps producing the diversity of compounds observed. It shows that plants silenced in diterpene glycoside production suffered more damage from herbivores in their natural habitat and were higher-quality food for a specialist herbivore.; [Abstract] [Full Text] [PDF] [Supplemental Data]