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    Arabidopsis cysteine-rich receptor-like kinase 45 functions in the responses to abscisic acid and abiotic stresses

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    Type
    Article
    Authors
    Zhang, Xiujuan cc
    Yang, Guanyu
    Shi, Rui
    Han, Xiaomin
    Qi, Liwang
    Wang, Ruigang
    Xiong, Liming cc
    Li, Guojing
    KAUST Department
    Biological and Environmental Science and Engineering (BESE) Division
    Bioscience Program
    Center for Desert Agriculture
    Plant Science
    Plant Stress Genomics Research Lab
    Date
    2013-06
    Permanent link to this record
    http://hdl.handle.net/10754/562786
    
    Metadata
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    Abstract
    The phytohormone abscisic acid (ABA) regulates seed germination, plant growth and development, and response to abiotic stresses such as drought and salt stresses. Receptor-like kinases are well known signaling components that mediate plant responses to developmental and environmental stimuli. Here, we characterized the biological function of an ABA and stress-inducible cysteine-rich receptor-like protein kinase, CRK45, in ABA signaling in Arabidopsis thaliana. The crk45 mutant was less sensitive to ABA than the wild type during seed germination and early seedling development, whereas CRK45 overexpression plants were more sensitive to ABA compared to the wild type. Furthermore, overexpression of CRK45 led to hypersensitivity to salt and glucose inhibition of seed germination, whereas the crk45 mutant showed the opposite phenotypes. In addition, CRK45 overexpression plants had enhanced tolerance to drought. Gene expression analyses revealed that the expression of representative stress-responsive genes was significantly enhanced in CRK45 overexpression plants in response to salt stress. ABA biosynthetic genes such as NCED3,. 22NCED3, 9-Cis-Epoxycarotenoid Dioxygenase 3.NCED5,. 33NCED5, 9-Cis-Epoxycarotenoid Dioxygenase 5.ABA2,. 44ABA2, Abscisic Acid Deficient 2. and AAO355AAO3, Abscisic Aldehyde Oxidase 3. were also constitutively elevated in the CRK45 overexpression plants. We concluded that CRK45 plays an important role in ABA signaling that regulates Arabidopsis seeds germination, early seedling development and abiotic stresses response, by positively regulating ABA responses in these processes. © 2013 Elsevier Masson SAS.
    Citation
    Zhang, X., Yang, G., Shi, R., Han, X., Qi, L., Wang, R., … Li, G. (2013). Arabidopsis cysteine-rich receptor-like kinase 45 functions in the responses to abscisic acid and abiotic stresses. Plant Physiology and Biochemistry, 67, 189–198. doi:10.1016/j.plaphy.2013.03.013
    Sponsors
    We thank Dr. Shuqun Zhang for critical reading of the manuscript, and Kathleen M. Buckley, M.S. for editing assistance. This work was supported by the grants from National Natural Science Foundation and Ministry of Education of China (grant nos. 30860029 and NCET-11-1020 to R.W.), and from Ministry of Science and Technology of China and Inner Mongolia Agricultural University (grant nos. 2011AA100203 and NDPYTD2010-3 to G.L.).
    Publisher
    Elsevier BV
    Journal
    Plant Physiology and Biochemistry
    DOI
    10.1016/j.plaphy.2013.03.013
    PubMed ID
    23583936
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.plaphy.2013.03.013
    Scopus Count
    Collections
    Articles; Biological and Environmental Science and Engineering (BESE) Division; Bioscience Program; Center for Desert Agriculture

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