文献类型： 外文期刊

第一作者： Xiong Meng

作者： Xiong Meng;Shen Xiangling;Xiong Meng;Meng Shuai;Qiu Jiehua;Shi Huanbin;Kou Yanjun

作者机构：

关键词： Psr1; rice false smut disease; pathogenic factor; clavicipitaceae; Ustilaginoidea virens

期刊名称：RICE SCIENCE （ 影响因子：3.333； 五年影响因子：4.226 ）

ISSN： 1672-6308

年卷期： 2020 年 27 卷 6 期

页码：

收录情况： SCI

摘要： Ustilaginoidea virens is the causal agent of rice false smut, which can be a highly destructive disease of rice. The plasma membrane phosphatase Psr1 proteins, which act as a regulator of the salinity stress response in yeast, are widely distributed across fungi, but their functional characterization is sketchy. In this study, we characterized the functions of Psr1 protein, UvPsr1, in U. virens. Analyses of the Uvpsr1 and its complementation strain showed that UvPsr1 is required for normal mycelial growth, conidiation and tolerance to oxidative, osmotic and cell wall stresses. When rice panicles were inoculated with the Uvpsr1 strains, no symptoms of false smut disease developed, showing that UvPSR1 also contributes to the pathogenicity of the fungus. The deletion mutant of UvPSR1 also appeared to produce a smaller titer of toxic compounds able to inhibit elongation of the germinated seeds. In conclusion, our results indicated that UvPsr1 is a new pathogenic factor of U. virens.

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