Ectopic expression of MYB repressor GmMYB3a improves drought tolerance and productivity of transgenic peanuts (Arachis hypogaea L.) under conditions of water deficit
文献类型： 外文期刊
作者： He, Yuxuan 1 ; Mu, Shujing 1 ; He, Zhongguo 1 ; Wang, Baizhong 1 ; Li, Yufa 1 ;
作者机构： 1.Jilin Acad Agr Sci, Changchun 130033, Peoples R China
关键词： Arachis hypogaea L; Drought stress; Ectopic expression; MYB; Transgenic peanut lines
期刊名称：TRANSGENIC RESEARCH （ 影响因子：2.788； 五年影响因子：2.377 ）
ISSN： 0962-8819
年卷期： 2020 年 29 卷 5-6 期
页码：
收录情况： SCI
摘要： Peanut is widely grown and provides protein and edible oil for millions of people. Peanut growth and productivity are frequently negatively affected by abiotic and biotic environmental factors. However, the research on improving peanut germplasm resources by genetic transformation is very limited. Here, the novel R2R3-MYB repressor GmMYB3a was introduced into peanut plants by Agrobacterium-mediated transformation for the first time for thorough evaluation of the function of GmMYB3a in drought stress plant responses. We generated GmMYB3a-transgenic peanut plants. The GmMYB3a-overexpressing lines showed significantly improved physiological responses and no yield loss non-transgenic plants, in terms of survival rates. Thus, the GmMYB3a-overexpressing plants showed better photosynthetic performance, higher relative water content, and greater water use efficiency, demonstrating their adaptive capacity to water deficit. We conclude that overexpression of GmMYB3a can improve drought tolerance and productivity in peanut.
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