Genome-wide association studies identify OsWRKY53 as a key regulator of salt tolerance in rice

文献类型： 外文期刊

第一作者： Yu, Jun

作者： Yu, Jun;An, Hongzhou;Tian, Yunlu;Chi, Wenchao;Chen, Gaoming;Ge, Yuwei;Li, Jin;Dai, Zhaoyang;Wang, Chunming;Wan, Jianmin;Yu, Jun;An, Hongzhou;Tian, Yunlu;Chi, Wenchao;Chen, Gaoming;Ge, Yuwei;Li, Jin;Dai, Zhaoyang;Wang, Chunming;Zhu, Chengsong;Xuan, Wei;Wang, Baoxiang;Liu, Yan;Sun, Zhiguang;Xu, Dayong;Wan, Jianmin

作者机构：

期刊名称：NATURE COMMUNICATIONS （ 影响因子：16.6； 五年影响因子：17.0 ）

ISSN：

年卷期： 2023 年 14 卷 1 期

页码：

收录情况： SCI

摘要： Salinity stress progressively reduces plant growth and productivity, while plant has developed complex signaling pathways to confront salt stress. However, only a few genetic variants have been identified to mediate salt tolerance in the major crop rice, and the molecular mechanism remains poorly understood. Here, we identify ten candidate genes associated with salt-tolerance (ST) traits by performing a genome-wide association analysis in rice landraces. We characterize two ST-related genes, encoding transcriptional factor OsWRKY53 and Mitogen-activated protein Kinase Kinase OsMKK10.2, that mediate root Na+ flux and Na+ homeostasis. We further find that OsWRKY53 acts as a negative modulator regulating expression of OsMKK10.2 in promoting ion homeostasis. Furthermore, OsWRKY53 trans-represses OsHKT1;5 (high-affinity K+ transporter 1;5), encoding a sodium transport protein in roots. We show that the OsWRKY53-OsMKK10.2 and OsWRKY53-OsHKT1;5 module coordinate defenses against ionic stress. The results shed light on the regulatory mechanisms underlying plant salt tolerance.

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