OsMSR3, a Small Heat Shock Protein, Confers Enhanced Tolerance to Copper Stress in Arabidopsis thaliana
文献类型： 外文期刊
作者： Cui, Yanchun 1 ; Wang, Manling 1 ; Yin, Xuming 1 ; Xu, Guoyun 2 ; Song, Shufeng 3 ; Li, Mingjuan 1 ; Liu, Kai 1 ; Xia, Xi 1 ;
作者机构： 1.Chinese Acad Sci, Key Lab Agroecol Proc Subtrop Reg, Inst Subtrop Agr, Changsha 410125, Hunan, Peoples R China
2.China Natl Tobacco Corp, Zhengzhou Tobacco Res Inst, Zhengzhou 450001, Henan, Peoples R China
3.Hunan Hybrid Rice Res Ctr, State Key Lab Hybrid Rice, Changsha 410125, Hunan, Peoples R China
关键词： Arabidopsis; small heat shock protein; OsMSR3; copper stress; reactive oxygen species
期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.923； 五年影响因子：6.132 ）
ISSN：
年卷期： 2019 年 20 卷 23 期
页码：
收录情况： SCI
摘要： Copper is a mineral element essential for the normal growth and development of plants; however, excessive levels can severely affect plant growth and development. Oryza sativa L. multiple stress-responsive gene 3 (OsMSR3) is a small, low-molecular-weight heat shock protein (HSP) gene. A previous study has shown that OsMSR3 expression improves the tolerance of Arabidopsis to cadmium stress. However, the role of OsMSR3 in the Cu stress response of plants remains unclear, and, thus, this study aimed to elucidate this phenomenon in Arabidopsis thaliana, to further understand the role of small HSPs (sHSPs) in heavy metal resistance in plants. Under Cu stress, transgenic A. thaliana expressing OsMSR3 showed higher tolerance to Cu, longer roots, higher survival rates, biomass, and relative water content, and accumulated more Cu, abscisic acid (ABA), hydrogen peroxide, chlorophyll, carotenoid, superoxide dismutase, and peroxidase than wild-type plants did. Moreover, OsMSR3 expression in A. thaliana increased the expression of antioxidant-related and ABA-responsive genes. Collectively, our findings suggest that OsMSR3 played an important role in regulating Cu tolerance in plants and improved their tolerance to Cu stress through enhanced activation of antioxidative defense mechanisms and positive regulation of ABA-responsive gene expression.
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