数字农科院2.0

A K+-Efflux Antiporter is Vital for Tolerance to Salt Stress in Rice

文献类型： 外文期刊

作者： Wei Xie;He Liu;Deyong Ren;Yiting Wei;Ying Liu;Luyao Tang;Chaoqing Ding;Zhengji Shao;Qian Qian;Yuchun Rao

作者机构：

关键词： Chloroplast integrity and DNA damage;Na+/K+ and ROS balance;OsKEA1;Rice;Salt stress

期刊名称： Rice

ISSN： 1939-8425

年卷期： 2025 年 18 卷 1 期

页码：

收录情况： SCIE（2025版）

摘要： Salt damage significantly affects rice growth and development, posing a threat to food security. Understanding the mechanisms underlying rice's response to salt stress is crucial for enhancing its tolerance. This study aimed to elucidate the genetic and physiological mechanisms of rice adaptation to salt stress. We found that the expression of OsKEA1, a potassium (K+)-efflux antiporter gene in rice, was induced by salt. Both genetic and physiological experiments demonstrated that the mutation in OsKEA1 disrupted the Na+/K+ balance under salt stress conditions. Furthermore, OsKEA1 mutation exacerbated reactive oxygen species (ROS) accumulation, disrupted the antioxidant enzyme system, and compromised chloroplast integrity under salt stress. This study unveils the adaptive mechanisms of rice to salt damage and highlights the critical role of OsKEA1 in managing salt stress.

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