Cell wall-associated receptor kinase GhWAKL26 positively regulates salt tolerance by maintaining Na+ and K+ homeostasis in cotton

文献类型： 外文期刊

第一作者： Gao, Siqi

作者： Gao, Siqi;Zhao, Yinghao;Li, Xiaona;Wu, Yuchen;Li, Jianing;Zhu, Wei;Ma, Zongbin;Liu, Wei;Zhang, Zhiqiang;Huo, Wenqi;Zhang, Zhiqiang;Huo, Wenqi

作者机构：

关键词： Cotton; Salt tolerance; WAK/WAKL; VIGS; Na+/K+

期刊名称：ENVIRONMENTAL AND EXPERIMENTAL BOTANY （ 影响因子：4.5； 五年影响因子：5.2 ）

ISSN： 0098-8472

年卷期： 2024 年 226 卷

页码：

收录情况： SCI

摘要： Cell wall-associated receptor kinases (WAKs/WAKLs), are a specialized class of plant receptor kinases essential for signaling during stress conditions. However, there has been no report on the involvement of WAKs/WAKLs in salt tolerance in cotton. In this study, we report the functional characterization of GhWAKL26, whose expression is induced by salt, with its levels increasing over time and with higher salt concentrations. In addition, the fusion protein of GhWAKL26 and GFP was localized to the plasma membrane. In transgenic Arabidopsis, the dry weight, fresh weight, and root length were significantly higher than those of wild-type plants, indicating enhanced salt tolerance. While in GhWAKL26-silenced cotton seedlings, H2O2, O-2(-), and MDA content were increased, and chlorophyll content was reduced under salt stress, displaying compromised salt tolerance. RNA-seq analysis revealed that the silencing of GhWAKL26 resulted in the down-regulation of expression levels of certain ion transport-related genes under salt stress, concurrently leading to an increased Na+/K+ ratio in cotton seedlings. Overall, our findings indicate that GhWAKL26 enhanced plant resistance to salt stress in cotton by regulating the balance of Na+ and K+ ions.

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