GhFB15 is an F-box protein that modulates the response to salinity by regulating flavonoid biosynthesis

文献类型： 外文期刊

第一作者： Geng, Zhao

作者： Geng, Zhao;Dou, Haikuan;Liu, Jianguang;Zhao, Guiyuan;Liu, Linlin;Zhang, Hanshuang;Wang, Yongqiang;An, Zetong;Zhao, Ning

作者机构：

关键词： Cotton; F-box protein; GhFB15; Salt tolerance; Flavonoid

期刊名称：PLANT SCIENCE （ 影响因子：5.2； 五年影响因子：5.7 ）

ISSN： 0168-9452

年卷期： 2024 年 338 卷

页码：

收录情况： SCI

摘要： An exposure to extremely saline conditions can lead to significant oxidative damage in plants. Flavonoids, which are potent antioxidants, are critical for the scavenging of reactive oxygen species caused by abiotic stress. In the present study, the cotton F-box gene GhFB15 was isolated and characterized. The expression of GhFB15 was rapidly induced by salt as well as by exogenous hormones (ETH, MeJA, ABA, and GA). An analysis of subcellular localization revealed GhFB15 is mainly distributed in nuclei. Overexpression of GhFB15 adversely affected the salt tolerance of transgenic Arabidopsis plants as evidenced by decreased seed germination and seedling growth, whereas the silencing of GhFB15 improved the salt tolerance of cotton plants. Furthermore, we analyzed the gene expression profiles of VIGS-GhFB15 and TRV:00 plants. Many of the differentially expressed genes were associated with the flavonoid biosynthesis pathway. Moreover, lower flavonoid contents and higher levels of H2O2 and O-2(-) were observed in the transgenic Arabidopsis plants. Conversely, the VIGS-GhFB15 cotton plants had relatively higher flavonoid contents, but lower H2O2 and O-2(-) levels. These results suggest that GhFB15 negatively regulates salt tolerance, and silencing GhFB15 results in increased flavonoid accumulation and improved ROS scavenging.

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