Yeast heat-shock protein gene HSP26 enhances freezing tolerance in Arabidopsis

文献类型： 外文期刊

第一作者： Xue, Yong

作者： Xue, Yong;Peng, Rihe;Xiong, Aisheng;Li, Xian;Yao, Quanhong;Zha, Dingshi

作者机构：

关键词： Saccharomyces cerevisiae;fungal proteins;heat shock proteins;molecular chaperones;gene overexpression;Arabidopsis thaliana;transgenic plants;cold tolerance;cold stress;free amino acids;proline;sugars

期刊名称：JOURNAL OF PLANT PHYSIOLOGY （ 影响因子：3.549； 五年影响因子：4.164 ）

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收录情况： SCI

摘要： In the yeast Saccharomyces cerevisiae, the molecular chaperone Hsp26 is one component of the heat-shock response. Hsp26 has the remarkable ability to directly sense increases in temperature and switch from an inactive state to a chaperone-active state. In this study, we report a functional analysis of Hsp26 in Arabidopsis thaliana and its response to freezing stress. After freezing stress, the HSP26 transgenic plants exhibited stronger growth than the wild-type plants. We found that over-expression of HSP26 in Arabidopsis increased the amounts of free proline and soluble sugars, elevated the expression of stress defense genes, and enhanced Arabidopsis tolerance to freezing stress. Taken together, our results indicate that Hsp26 may play an important role in the response of transgenic Arabidopsis plants to freezing stresses.

分类号： Q94

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