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ZmCIPK21, A Maize CBL-Interacting Kinase, Enhances Salt Stress Tolerance in Arabidopsis thaliana

文献类型： 外文期刊

作者： Chen, Xunji 1 ; Huang, Quansheng 3 ; Zhang, Fan 1 ; Wang, Bo 1 ; Wang, Jianhua 1 ; Zheng, Jun 2 ;

作者机构： 1.China Agr Univ, Coll Agr & Biotechnol, Beijing 100094, Peoples R China

2.Chinese Acad Agr Sci, Inst Crop Sci, Beijing 100081, Peoples R China

3.Xinjiang Acad Agr Sci, Inst Nucl Technol & Biotechnol, Urumqi 830091, Peoples R China

关键词： CIPK;stress;salt tolerance;Arabidopsis

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.923； 五年影响因子：6.132 ）

ISSN： 1422-0067

年卷期： 2014 年 15 卷 8 期

页码：

收录情况： SCI

摘要： 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.

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