数字农科院2.0

Regulation of FpvelC on Conidiation, Pathogenicity and Secondary Metabolism 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;Peisong Hu

作者机构：

关键词： conidiation;fumonisins;Fusarium proliferatum;pathogenicity;velvet protein

期刊名称： Toxins

ISSN： 2072-6651

年卷期： 2025 年 17 卷 9 期

页码：

收录情况： SCIE（2025版）

摘要： The velvet complex is a master regulator of multiple physiological processes in filamentous fungi. In this study, we characterized the functions of velvet gene FpvelC in Fusarium proliferatum, which was the causative agent of rice spikelet rot disease. Compared with the wild-type Fp9 strain, deletion of FpvelC hindered conidiation, leading to a low level of trehalose content but excessive accumulation of chitin in conidia. Lack of FpvelC resulted in increased sensitivity to oxidative stress and decreased expression of antioxidant genes. Notably, ΔFpvelC exhibited attenuated pathogenicity on rice and maize, failure to produce invasive hyphae, and downregulation of genes encoding xylanases and xyloglucanases during infection processes. Nevertheless, disruption of FpvelC enhanced production of fumonisin B1 (FB1) and fusaric acid concomitantly; transcripts of the clustering genes responsible for the two mycotoxins’ biosynthesis were significantly increased. Additionally, the absence of FpvelC was displayed as more sensitive to rapamycin than the Fp9 strain, accompanied with less intracellular glutamine. Overall, FpvelC played versatile roles in conidiation, response to oxidative stress, pathogenicity and mycotoxins production in F. proliferatum.

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