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    The glossyhead1 allele of acc1 reveals a principal role for multidomain acetyl-coenzyme a carboxylase in the biosynthesis of cuticular waxes by Arabidopsis

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    Type
    Article
    Authors
    Lu, Shiyou
    Zhao, Huayan
    Parsons, Eugene P.
    Xu, Changcheng
    Kosma, Dylan K.
    Xu, Xiaojing
    Chao, Daiyin
    Lohrey, Gregory T.
    Bangarusamy, Dhinoth Kumar
    Wang, Guangchao
    Bressan, Ray Anthony
    Jenks, Matthew A.
    KAUST Department
    Biological and Environmental Science and Engineering (BESE) Division
    Bioscience Core Lab
    Bioscience Program
    Center for Desert Agriculture
    Core Labs
    Imaging and Characterization Core Lab
    Date
    2011-09-23
    Online Publication Date
    2011-09-23
    Print Publication Date
    2011-11-01
    Permanent link to this record
    http://hdl.handle.net/10754/561878
    
    Metadata
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    Abstract
    A novel mutant of Arabidopsis (Arabidopsis thaliana), having highly glossy inflorescence stems, postgenital fusion in floral organs, and reduced fertility, was isolated from an ethyl methanesulfonate-mutagenized population and designated glossyhead1 (gsd1). The gsd1 locus was mapped to chromosome 1, and the causal gene was identified as a new allele of Acetyl-Coenzyme A Carboxylase1 (ACC1), a gene encoding the main enzyme in cytosolic malonyl-coenzyme A synthesis. This, to our knowledge, is the first mutant allele of ACC1 that does not cause lethality at the seed or early germination stage, allowing for the first time a detailed analysis of ACC1 function in mature tissues. Broad lipid profiling of mature gsd1 organs revealed a primary role for ACC1 in the biosynthesis of the very-long-chain fatty acids (C 20:0 or longer) associated with cuticular waxes and triacylglycerols. Unexpectedly, transcriptome analysis revealed that gsd1 has limited impact on any lipid metabolic networks but instead has a large effect on environmental stress-responsive pathways, especially senescence and ethylene synthesis determinants, indicating a possible role for the cytosolic malonyl-coenzyme A-derived lipids in stress response signaling. © 2011 American Society of Plant Biologists. All Rights Reserved.
    Citation
    Lü, S., Zhao, H., Parsons, E. P., Xu, C., Kosma, D. K., Xu, X., … Jenks, M. A. (2011). The glossyhead1 Allele of ACC1 Reveals a Principal Role for Multidomain Acetyl-Coenzyme A Carboxylase in the Biosynthesis of Cuticular Waxes by Arabidopsis. Plant Physiology, 157(3), 1079–1092. doi:10.1104/pp.111.185132
    Sponsors
    We are grateful to Dr. Masao Tasaka (Nara Institute of Science and Technology) for providing emb22 and acc1-3 seeds. We also thank Debra Sherman and Chia-Ping Huang of the Purdue University Electron Microscopy Center for support.
    Publisher
    American Society of Plant Biologists (ASPB)
    Journal
    PLANT PHYSIOLOGY
    DOI
    10.1104/pp.111.185132
    PubMed ID
    21949210
    PubMed Central ID
    PMC3252135
    Additional Links
    http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3252135
    ae974a485f413a2113503eed53cd6c53
    10.1104/pp.111.185132
    Scopus Count
    Collections
    Articles; Biological and Environmental Science and Engineering (BESE) Division; Bioscience Program; Imaging and Characterization Core Lab; Bioscience Core Lab; Center for Desert Agriculture

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