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Over-expression of heat shock protein gene hsp26 in Arabidopsis thaliana enhances heat tolerance

文献类型： 外文期刊

作者： Xue, Y. 1 ; Peng, R. 1 ; Xiong, A. 1 ; Li, X. 1 ; Zha, D. 2 ; Yao, Q. 1 ;

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

2.Shanghai Acad Agr Sci, Inst Hort Res, Shanghai 201106, Peoples R China

关键词： high temperature stress;transgenic plants;yeast gene

期刊名称：BIOLOGIA PLANTARUM （ 影响因子：1.747； 五年影响因子：2.146 ）

ISSN： 0006-3134

年卷期： 2010 年 54 卷 1 期

页码：

收录情况： SCI

摘要： In the yeast Saccharomyces cerevisiae, the molecular chaperone HSP26 has the remarkable ability to sense increases in temperature directly and can switch from an inactive to a chaperone-active state. In this report, we analyzed the effect of expression of HSP26 in Arabidopsis thaliana plants and their response to high temperature stress. The hsp26 transgenic plants exhibited stronger growth than wild type plants at 45 degrees C for 16 h. The chlorophyll content and chlorophyll fluorescence decreased much more in wild type than in transgenic plants. Moreover, the transgenic plants had higher proline and soluble sugar contents, and lower relative electrical conductivity and malondialdehyde contents after high temperature stress. Furthermore, we found that over-expression of HSP26 in Arabidopsis increased the amount of free proline, elevated the expression of proline biosynthetic pathway genes and therefore enhanced Arabidopsis tolerance to heat stress.

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