TaFLZ54D enhances salt stress tolerance in wheat by interacting with TaSGT1 and TaPP2C

文献类型： 外文期刊

第一作者： Qin, Yuxiang

作者： Qin, Yuxiang;Zhang, Bao;Cui, Shoufu;Qin, Xiaochun;Li, Genying

作者机构：

关键词： wheat; FLZ; salt tolerance; protein interaction; Na plus exclusion

期刊名称：JOURNAL OF INTEGRATIVE AGRICULTURE （ 影响因子：4.4； 五年影响因子：4.8 ）

ISSN： 2095-3119

年卷期： 2025 年 24 卷 3 期

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收录情况： SCI

摘要： FCS-like zinc finger (FLZ) gene family members are C2-C2 zinc finger proteins that take part in seed dormancy, resistance to Myzus persicae 1, sucrose signaling and abiotic stresse tolerance. However, their functions, especially the molecular mechanism through which FLZs function, are not well understood. In this study, we characterized 120 FLZs in wheat and revealed the function and mechanism of TaFLZ54D increasing salt stress tolerance in transgenic wheat. Expression analysis demonstrated that TaFLZ54D can be induced by NaCl treatment and it had the highest expression level under NaCl treatment among the 120 FLZs. Over-expression of TaFLZ54D increased wheat salt stress tolerance and the transgenic plants had higher levels of superoxide dismutase (SOD) and peroxidase (POD) activities and soluble sugar content, but a lower Na+/K+ ratio and malondialdehyde (MDA) content than the wild type (WT) plants. Potassium ion transmembrane transporters and serine/threonine kinase inhibitor proteins showed differential expression between TaFLZ54D transgenic wheat and the WT. Yeast two hybrid and luciferase complementation assays revealed that TaSGT1 and TaPP2C are the proteins that interact directly with TaFLZ54D. In summary, TaFLZ54D enhances salt stress tolerance through interaction with TaSGT1 and TaPP2C to reduce Na+ absorption and mitigate oxidative stress. The interaction between TaFLZ54D and TaSGT1, as well as TaPP2C indicated a link between salt stress tolerance of TaFLZ54D and the ubiquitin-mediated degradation of negative regulatory proteins.

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