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AtCPK6, a functionally redundant and positive regulator involved in salt/drought stress tolerance in Arabidopsis

文献类型： 外文期刊

作者： Xu, Jing 1 ; Tian, Yong-Sheng 1 ; Peng, Ri-He 1 ; Xiong, Ai-Sheng 1 ; Zhu, Bo 1 ; Jin, Xiao-Fen 1 ; Gao, Feng 1 ; Fu, Xia 1 ;

作者机构： 1.Shanghai Acad Agr Sci, Agrobiotechnol Res Inst, Shanghai 201106, Peoples R China

2.Nanjing Agr Univ, State Key Lab Crop Genet & Germplasm Enhancement, Nanjing 210095, Peoples R China

关键词： Arabidopsis;Drought;Functionally redundant;Salt;Stress tolerance

期刊名称：PLANTA （ 影响因子：4.116； 五年影响因子：4.316 ）

ISSN： 0032-0935

年卷期： 2010 年 231 卷 6 期

页码：

收录情况： SCI

摘要： The calcium-dependent protein kinase (CDPK) family is needed in plant signaling during various physiological pathways. The Arabidopsis AtCPK6 gene belongs to the subclass of stress-inducible CDPKs, which is stimulated by salt and osmotic stress. To elucidate the physiological function of AtCPK6, transgenic Arabidopsis plants under the control of double CaMV 35S promoter were obtained. AtCPK6 over-expressing plants showed enhanced tolerance to salt/drought stresses. The elevated tolerance of the AtCPK6 over-expressing plants was confirmed by the change of proline and malondialdehyde (MDA). Real-time PCR analyses revealed that the expression levels of several stress-regulated genes were altered in AtCPK6 over-expressing plants. However, cpk6 mutant displayed no obvious difference with control. These results are likely to indicate that AtCPK6 is functionally redundant and a positive regulator involved in the tolerance to salt/drought stress in Arabidopsis.

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