Woronin body protein UvHex1 is essential for pathogenesis, and contributes to conidiation, cell stress response, lipid metabolism, and mycotoxins production in rice false smut fungus Ustilaginoidea virens

文献类型： 外文期刊

第一作者： Mao, Yijun

作者： Mao, Yijun;Deng, Qingchao;Yu, Junjie;Mao, Yijun;Pan, Xiayan;Yu, Mina;Cao, Huijuan;Song, Tianqiao;Qi, Zhongqiang;Du, Yan;Zhang, Rongsheng;Liu, Yongfeng;Yu, Junjie

作者机构：

关键词： Ustilaginoidea virens; Woronin body; UvHex1; Pathogenicity

期刊名称：PHYTOPATHOLOGY RESEARCH （ 影响因子：3.5； 五年影响因子：3.9 ）

ISSN： 2096-5362

年卷期： 2025 年 7 卷 1 期

页码：

收录情况： SCI

摘要： Woronin bodies (WBs) are unique single-membrane microbodies derived from peroxisomes found in fungi within the Pezizomycotina subphylum. WBs can seal hyphal septa to prevent cytoplasmic leakage upon hyphal damage. The hexagonal peroxisomal protein, Hex1, is a key component in the formation of WBs. In this study, the ortholog of Hex1 in U. virens (UvHex1) was targeted for deletion using homologous recombination and subsequent complementation. The findings revealed that the deletion of Uvhex1 gene resulted in a loss of pathogenicity, a slight reduction in mycelial growth, and highly sensitivity to cell wall, oxidative, and osmotic stress. In contrast, the Uvhex1 deletion mutants exhibited enhanced capacity for utilizing long-chain fatty acids and producing mycotoxins. These results suggest that UvHex1 is crucial for WBs formation and pathogenicity, and it also plays important roles in conidiation, cellular stress response, lipid metabolism, and mycotoxin production in the rice false smut fungus U. virens.

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