Velvet Family Protein FpVelB Affects Virulence in Association with Secondary Metabolism in Fusarium pseudograminearum

文献类型： 外文期刊

第一作者： Wu, Yuxing

作者： Wu, Yuxing;Han, Sen;Wang, Yajiao;Li, Qiusheng;Kong, Lingxiao

作者机构：

关键词： Triticum aestivum; Fusarium pseudograminearum; velvet; conidiation; secondary metabolite

期刊名称：CELLS （ 影响因子：5.1； 五年影响因子：6.0 ）

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年卷期： 2024 年 13 卷 11 期

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收录情况： SCI

摘要： Fusarium pseudograminearum causes destructive crown disease in wheat. The velvet protein family is a crucial regulator in development, virulence, and secondary metabolism of fungi. We conducted a functional analysis of FpVelB using a gene replacement strategy. The deletion of FpVelB decreased radial growth and enhanced conidial production compared to that of wild type. Furthermore, FpVelB modulates the fungal responses to abiotic stress through diverse mechanisms. Significantly, virulence decreased after the deletion of FpVelB in both the stem base and head of wheat. Genome-wide gene expression profiling revealed that the regulation of genes by FpVelB is associated with several processes related to the aforementioned phenotype, including "immune", "membrane", and "antioxidant activity", particularly with regard to secondary metabolites. Most importantly, we demonstrated that FpVelB regulates pathogen virulence by influencing deoxynivalenol production and modulating the expression of the PKS11 gene. In conclusion, FpVelB is crucial for plant growth, asexual development, and abiotic stress response and is essential for full virulence via secondary metabolism in F. pseudograminearum.

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