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- Title
ZmCIPK21, A Maize CBL-Interacting Kinase, Enhances Salt Stress Tolerance in Arabidopsis thaliana.
- Authors
Xunji Chen; Quansheng Huang; Fan Zhang; Bo Wang; Jianhua Wang; Jun Zheng
- Abstract
Salt stress represents an increasing threat to crop growth and yield in saline soil. In this study, we identified a maize calcineurin B-like protein-interacting protein kinase (CIPK), ZmCIPK21, which was primarily localized in the cytoplasm and the nucleus of cells and displayed enhanced expression under salt stress. Over-expression of ZmCIPK21 in wild-type Arabidopsis plants increased their tolerance to salt, as supported by the longer root lengths and improved growth. The downstream stress-response genes, including dehydration-responsive element-binding (DREB) genes were also activated in transgenic plants over-expressing ZmCIPK21. In addition, introduction of the transgenic ZmCIPK21 gene into the Arabidopsis mutant cipk1-2 rescued the salt-sensitive phenotype under high salt stress. Measurement of Na+ and K+ content in transgenic plants showed that over-expression of ZmCIPK21 decreased accumulation of Na+ and allowed retention of relatively high levels of K+, thereby enhancing plant tolerance to salt conditions.
- Subjects
ARABIDOPSIS thaliana; EFFECT of salt on plants; CALCINEURIN; PROTEIN kinases; EFFECT of stress on plants; CORN genetics; GENE expression in plants
- Publication
International Journal of Molecular Sciences, 2014, Vol 15, Issue 8, p14819
- ISSN
1661-6596
- Publication type
Article
- DOI
10.3390/ijms150814819