Overexpression of CRK4, the cysteine-rich receptor-like protein kinase of Arabidopsis, regulates the resistance to abiotic stress and abscisic acid responses
Ye-Jin Jang, Sung-Dug Oh, Kangmin Kim, Seong-Kon Lee, Ancheol Chang, Doh-Won Yun, Chul Min Kim, Bumkyu Lee
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引用次数: 0
Abstract
Receptor-like kinases (RLKs) are known to regulate plant growth, cell differentiation, and defense mechanisms. Cysteine-rich receptor-like protein kinases (CRKs) are a subfamily of RLKs with more than 40 members. In this study, we found that overexpressing CRK4 in Arabidopsis enhances abiotic tolerance to salinity and drought stress. We constructed a CRK4-overexpressed pCB302ES plasmid, transformed it into Arabidopsis and evaluated the insertion site of the transgene. The CRK4-overexpressed line was selected for molecular analyses, including western blotting and flanking T-DNA sequencing. In pots treated with either 200 mM NaCl or dryness, the CRK4-overexpressed line showed higher resistance than the wild-type Columbia-0 (Col-0). The expression levels of DREB2B, RAB18, and RD29B genes associated with plant stress, were lower than those of wild-type Col-0. In addition, ABF1 and abscisic-acid-responsive element-binding factor 1 expression levels increased in CRK4-overexpressed transgenic Arabidopsis. Furthermore, in an abscisic acid (ABA)-containing medium, CRK4-overexpressed transgenic Arabidopsis and wild-type Col-0 showed different root development patterns. Our results indicate that CRK4 modulates the ABA-signaling pathway and responds to salt and drought stress in Arabidopsis. This study helps elucidate the correlation between the ABA and CRK4 genes.
期刊介绍:
Plant Biotechnology Reports publishes original, peer-reviewed articles dealing with all aspects of fundamental and applied research in the field of plant biotechnology, which includes molecular biology, genetics, biochemistry, cell and tissue culture, production of secondary metabolites, metabolic engineering, genomics, proteomics, and metabolomics. Plant Biotechnology Reports emphasizes studies on plants indigenous to the Asia-Pacific region and studies related to commercialization of plant biotechnology. Plant Biotechnology Reports does not exclude studies on lower plants including algae and cyanobacteria if studies are carried out within the aspects described above.