Overexpression of transcription factor FaMYB63 enhances salt tolerance by directly binding to the SOS1 promoter in Arabidopsis thaliana

文献类型： 外文期刊

第一作者： Wang, Shuaishuai

作者： Wang, Shuaishuai;Jiang, Rongyi;Feng, Jian;Zou, Haodong;Han, Xiaohuan;Xie, Xingbin;Zheng, Guanghui;Fang, Congbing;Zhao, Jing;Wang, Shuaishuai

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关键词： Fragaria x ananassa; MYB; Salt stress; Regulator

期刊名称：PLANT MOLECULAR BIOLOGY （ 影响因子：5.1； 五年影响因子：5.3 ）

ISSN： 0167-4412

年卷期： 2024 年 114 卷 2 期

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收录情况： SCI

摘要： Salinity is a pivotal abiotic stress factor with far-reaching consequences on global crop growth, yield, and quality and which includes strawberries. R2R3-MYB transcription factors encompass a range of roles in plant development and responses to abiotic stress. In this study, we identified that strawberry transcription factor FaMYB63 exhibited a significant upregulation in its expression under salt stress conditions. An analysis using yeast assay demonstrated that FaMYB63 exhibited the ability to activate transcriptional activity. Compared with those in the wild-type (WT) plants, the seed germination rate, root length, contents of chlorophyll and proline, and antioxidant activities (SOD, CAT, and POD) were significantly higher in FaMYB63-overexpressing Arabidopsis plants exposed to salt stress. Conversely, the levels of malondialdehyde (MDA) were considerably lower. Additionally, the FaMYB63-overexpressed Arabidopsis plants displayed a substantially improved capacity to scavenge active oxygen. Furthermore, the activation of stress-related genes by FaMYB63 bolstered the tolerance of transgenic Arabidopsis to salt stress. It was also established that FaMYB63 binds directly to the promoter of the salt overly sensitive gene SOS1, thereby activating its expression. These findings identified FaMYB63 as a possible and important regulator of salt stress tolerance in strawberries.

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