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    The putative E3 ubiquitin ligase ECERIFERUM9 regulates abscisic acid biosynthesis and response during seed germination and postgermination growth in arabidopsis

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    Type
    Article
    Authors
    Zhao, Huayan
    Zhang, Huoming cc
    Cui, Peng cc
    Ding, Feng cc
    Wang, Guangchao
    Li, Rongjun
    Jenks, Matthew A.
    Lü, Shiyou
    Xiong, Liming cc
    KAUST Department
    Analytical Chemistry Core Lab
    Analytical Core Lab
    Biological and Environmental Sciences and Engineering (BESE) Division
    Bioscience Core Lab
    Bioscience Program
    Core Labs
    Imaging and Characterization Core Lab
    Plant Science
    Plant Stress Genomics Research Lab
    Date
    2014-05-08
    Online Publication Date
    2014-05-08
    Print Publication Date
    2014-07-01
    Permanent link to this record
    http://hdl.handle.net/10754/563542
    
    Metadata
    Show full item record
    Abstract
    The ECERIFERUM9 (CER9) gene encodes a putative E3 ubiquitin ligase that functions in cuticle biosynthesis and the maintenance of plant water status. Here, we found that CER9 is also involved in abscisic acid (ABA) signaling in seeds and young seedlings of Arabidopsis (Arabidopsis thaliana). The germinated embryos of the mutants exhibited enhanced sensitivity to ABA during the transition from reversible dormancy to determinate seedling growth. Expression of the CER9 gene is closely related to ABA levels and displays a similar pattern to that of ABSCISIC ACID-INSENSITIVE5 (ABI5), which encodes a positive regulator of ABA responses in seeds. cer9 mutant seeds exhibited delayed germination that is independent of seed coat permeability. Quantitative proteomic analyses showed that cer9 seeds had a protein profile similar to that of the wild type treated with ABA. Transcriptomics analyses revealed that genes involved in ABA biosynthesis or signaling pathways were differentially regulated in cer9 seeds. Consistent with this, high levels of ABA were detected in dry seeds of cer9. Blocking ABA biosynthesis by fluridone treatment or by combining an ABA-deficient mutation with cer9 attenuated the phenotypes of cer9. Whereas introduction of the abi1-1, abi3-1, or abi4-103 mutation could completely eliminate the ABA hypersensitivity of cer9, introduction of abi5 resulted only in partial suppression. These results indicate that CER9 is a novel negative regulator of ABA biosynthesis and the ABA signaling pathway during seed germination. © 2014 American Society of Plant Biologists. All Rights Reserved.
    Citation
    Zhao, H., Zhang, H., Cui, P., Ding, F., Wang, G., Li, R., … Xiong, L. (2014). The Putative E3 Ubiquitin Ligase ECERIFERUM9 Regulates Abscisic Acid Biosynthesis and Response during Seed Germination and Postgermination Growth in Arabidopsis. Plant Physiology, 165(3), 1255–1268. doi:10.1104/pp.114.239699
    Sponsors
    This work was supported by King Abdullah University of Science and Technology (to L.X.) and by the Natural Science Foundation of China (grant no. 113137033816 to S.L.).
    Publisher
    American Society of Plant Biologists (ASPB)
    Journal
    PLANT PHYSIOLOGY
    DOI
    10.1104/pp.114.239699
    PubMed ID
    24812105
    PubMed Central ID
    PMC4081335
    Additional Links
    http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4081335
    ae974a485f413a2113503eed53cd6c53
    10.1104/pp.114.239699
    Scopus Count
    Collections
    Articles; Biological and Environmental Science and Engineering (BESE) Division; Bioscience Program; Analytical Chemistry Core Lab; Imaging and Characterization Core Lab; Bioscience Core Lab

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