数字农科院2.0

Natural variation in SlSOS2 promoter hinders salt resistance during tomato domestication

文献类型： 外文期刊

作者： Hong, Yechun;Guan, Xijin;Wang, Xu;Kong, Dali;Yu, Shuojun;Wang, Zhiqiang;Yu, Yongdong;Chao, Zhen-Fei;Liu, Xue;Huang, Sanwen;Zhu, Jian-Kang;Zhu, Guangtao;Wang, Zhen

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期刊名称： HORTICULTURE RESEARCH

ISSN： 2662-6810

年卷期： 2023 年 10 卷 1 期

页码：

收录情况： SCIE（2023版） ; ; CSCD（2023-2024年度） ; ; 科技核心（2023版） ; ; 农林核心（2020版）

摘要： Increasing soil salinization seriously impairs plant growth and development, resulting in crop loss. The Salt-Overly-Sensitive (SOS) pathway is indispensable to the mitigation of Na (+) toxicity in plants under high salinity. However, whether natural variations of SOS2 contribute to salt tolerance has not been reported. Here a natural variation in the SlSOS2 promoter region was identified to be associated with root Na+/K+ ratio and the loss of salt resistance during tomato domestication. This natural variation contains an ABI4-binding cis-element and plays an important role in the repression of SlSOS2 expression. Genetic evidence revealed that SlSOS2 mutations increase root Na+/K+ ratio under salt stress conditions and thus attenuate salt resistance in tomato. Together, our findings uncovered a critical but previously unknown natural variation of SOS2 in salt resistance, which provides valuable natural resources for genetic breeding for salt resistance in cultivated tomatoes and other crops.

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