数字农科院2.0

Members of Velvet Complex FpVeA and FpVelB Regulate Asexual Development, Fumonisin Biosynthesis and Virulence in Fusarium proliferatum

文献类型： 外文期刊

作者： Ling Wang *;† ; Shaoqing Tang †; Weiyang Liao; Zhonghua Sheng; Shikai Hu; Gui’ai Jiao; Gaoneng Shao;Lihong Xie and Peisong Hu *

关键词： Fusarium proliferatum; VeA; VelB; fumonisins; conidiation; virulence

期刊名称： Foods

ISSN：

年卷期： 2025 年

页码：

收录情况： SCIE（2025版）

摘要： Fusarium proliferatum is the causative agent of rice spikelet rot disease, which can produce a group of toxic secondary metabolites, especially fumonisins. Velvet complex is a master regulator governing the development processes and secondary metabolism in filamentous fungi. In this study, we investigated the biological functions of velvet members FpVeA and FpVelB in F. proliferatum. Compared with the wild-type Fp9 strain, deletion of FpveA or FpvelB genes resulted in retarded hyphal growth but promoted conidiation. Disruption mutants exhibited decreased conidial trehalose contents and enhanced sensitivity to H2O2 stress, as well as inducing expression of photoreceptors. Notably, inactivation of FpveA or FpvelB led to a reduction in production of fumonisin B1 (FB1), coinciding with downregulation of fumonisin biosynthetic genes. Furthermore, the absence of FpveA or FpvelB displayed attenuated virulence toward rice spikelets, accompanied by fewer invasive hyphae and a failure of penetration ability. Taken together, these results demonstrated that FpVeA and FpVelB play crucial roles in the asexual development, oxidative stress, toxin synthesis and pathogenicity of F. proliferatum.

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