A 14-3-3 protein positively regulates rice salt tolerance by stabilizing phospholipase C1
文献类型： 外文期刊
作者： Wang, Ningna 1 ; Shi, Yiyuan 1 ; Jiang, Qun 1 ; Li, Huan 1 ; Fan, Wenxia 1 ; Feng, Yu 1 ; Li, Li 1 ; Liu, Bin 2 ; Lin, Feng 1 ; Jing, Wen 1 ; Zhang, Wenhua 1 ; Shen, Like 1 ;
作者机构： 1.Nanjing Agr Univ, Coll Life Sci, Dept Plant Biol, State Key Lab Crop Genet & Germplasm Enhancement, Nanjing 210095, Peoples R China
2.Guangdong Acad Agr Sci, Rice Res Inst, Guangdong Key Lab New Technol Rice Breeding, Guangzhou, Peoples R China
3.Jiangsu Prov & Chinese Acad Sci, Inst Bot, Nanjing, Peoples R China
关键词： 14-3-3 proteins; Oryza Sativa; OsGF14b; OsPLC1; protein stability; salt stress
期刊名称：PLANT CELL AND ENVIRONMENT （ 影响因子：7.947； 五年影响因子：8.452 ）
ISSN： 0140-7791
年卷期：
页码：
收录情况： SCI
摘要： The phosphatidylinositol-specific phospholipase Cs (PI-PLCs) catalyze the hydrolysis of phosphatidylinositols, which play crucial roles in signaling transduction during plant development and stress response. However, the regulation of PI-PLC is still poorly understood. A previous study showed that a rice PI-PLC, OsPLC1, was essential to rice salt tolerance. Here, we identified a 14-3-3 protein, OsGF14b, as an interaction partner of OsPLC1. Similar to OsPLC1, OsGF14b also positively regulates rice salt tolerance, and their interaction can be promoted by NaCl stress. OsGF14b also positively regulated the hydrolysis activity of OsPLC1, and is essential to NaCl-induced activation of rice PI-PLCs. We further discovered that OsPLC1 was degraded via ubiquitin-proteasome pathway, and OsGF14b could inhibit the ubiquitination of OsPLC1 to protect OsPLC1 from degradation. Under salt stress, the OsPLC1 protein level in osgf14b was lower than the corresponding value of WT, whereas overexpression of OsGF14b results in a significant increase of OsPLC1 stability. Taken together, we propose that OsGF14b can interact with OsPLC1 and promote its activity and stability, thereby improving rice salt tolerance. This study provides novel insights into the important roles of 14-3-3 proteins in regulating protein stability and function in response to salt stress.
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