A novel miR160a-GmARF16-GmMYC2 module determines soybean salt tolerance and adaptation

文献类型： 外文期刊

第一作者： Wang, Chaofan

作者： Wang, Chaofan;Li, Xiaoming;Zhuang, Yongbin;Sun, Wancai;Cao, Hongxiang;Zhang, Dajian;Xu, Ran;Kong, Fanjiang

作者机构：

关键词： artificial selection; GmARF16; proline; salt stress; soybean

期刊名称：NEW PHYTOLOGIST （ 影响因子：9.4； 五年影响因子：10.5 ）

ISSN： 0028-646X

年卷期： 2024 年 241 卷 5 期

页码：

收录情况： SCI

摘要： center dot Salt stress is a major challenge that has a negative impact on soybean growth and productivity. Therefore, it is important to understand the regulatory mechanism of salt response to ensure soybean yield under such conditions.center dot In this study, we identified and characterized a miR160a-GmARF16-GmMYC2 module and its regulation during the salt-stress response in soybean.center dot miR160a promotes salt tolerance by cleaving GmARF16 transcripts, members of the Auxin Response Factor (ARF) family, which negatively regulates salt tolerance. In turn, GmARF16 activates GmMYC2, encoding a bHLH transcription factor that reduces salinity tolerance by down-regulating proline biosynthesis. Genomic analysis among wild and cultivated soybean accessions identified four distinct GmARF16 haplotypes. Among them, the GmARF16(H3) haplotype is preferentially enriched in localities with relatively saline soils, suggesting GmARF16(H3) was artificially selected to improve salt tolerance.center dot Our findings therefore provide insights into the molecular mechanisms underlying salt response in soybean and provide valuable genetic targets for the molecular breeding of salt tolerance.

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