Overexpression of a novel transcriptional repressor GmMYB3a negatively regulates salt-alkali tolerance and stress-related genes in soybean

文献类型： 外文期刊

第一作者： He, Yuxuan

作者： He, Yuxuan;Wang, Ying;Li, Jingwen;Yan, Fan;Wang, Qingyu;Yang, Xiangdong;Guo, Dongquan;Niu, Lu;Xu, Chong

作者机构：

关键词： Glycine max; MYB; Transcription factor; Negative regulator; salt-alkali stress

期刊名称：BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS （ 影响因子：3.575； 五年影响因子：3.381 ）

ISSN： 0006-291X

年卷期： 2018 年 498 卷 3 期

页码：

收录情况： SCI

摘要： Myeloblastosis (MYB) transcription factor (TF) plays a positive role in the growth and stress response of plants; tiowever, information on the functions of MYB repressors in soybean is limited. In the present study, the gene GmMYB3a was identified and characterized as a member of the R2R3 MYB repressor family, which is induced by various abiotic stresses. To understand the functions of GmMYB3a, a trans genic soybean over-expressing GmMYB3a was obtained and the photosynthetic index under salt alkali treatments was evaluated. The transgenic line exhibited a series of negative regulation relative to the wild-type control. Quantitative real tithe polymerase chain reaction revealed that the physiological parameters, including soluble sugar, free proline, and chlorophyll contents; and photosynthetic rate decreased in the transgenic plants. Furthermore, GmMYB3a overexpression down-regulated a set of key genes associated with plant defense signal pathways. These finding suggest that GmMYB3a negatively affects the response of plants to salt stress. (C) 2018 Published by Elsevier Inc.

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