Metconazole inhibits fungal growth and toxin production in major Fusarium species that cause rice panicle blight

文献类型： 外文期刊

第一作者： Wang, Bingbing

作者： Wang, Bingbing;Wang, Shuang;Qiu, Jianbo;Gao, Tao;Shi, Jianrong;Xu, Jianhong;Liu, Xin;Wang, Bingbing;Wang, Shuang;He, Dan;Zhou, Yunyun;Qiu, Jianbo;Lee, Yin-Won;Shi, Jianrong;Xu, Jianhong;Liu, Xin;He, Dan;Zhou, Yunyun;Xu, Jianhong;Liu, Xin;Lee, Yin-Won

作者机构：

关键词： Rice panicle blight; Toxigenic Fusarium spp.; Metconazole; Ergosterol; Control efficacy

期刊名称：PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY （ 影响因子：4.2； 五年影响因子：4.6 ）

ISSN： 0048-3575

年卷期： 2024 年 204 卷

页码：

收录情况： SCI

摘要： Rice panicle blight (RPB) caused by various Fusarium spp. is an emerging disease in the major rice-growing regions of China. Epidemics of this disease cause significant yield loss and reduce grain quality by contaminating panicles with different Fusarium toxins. However, there is currently no registered fungicide for the control of RPB in China. The 14 alpha-demethylation inhibitor (DMI) fungicide metconazole has been shown to be effective against several Fusarium spp. that cause wheat head blight, wheat crown rot and maize ear rot. In this study, we investigated the specific activity of metconazole against six Fusarium spp. that cause RPB. Metconazole significantly inhibited mycelial growth, conidium formation, germination, germ tube elongation and major toxin production in Fusarium strains collected from major rice-growing regions in China, as well as disrupting cell membrane function by inhibiting ergosterol biosynthesis. Greenhouse experiments indicated a significant reduction in blight occurrence and toxin accumulation in rice panicles treated with metconazole. Overall, our study demonstrated the potential of metconazole for managing RPB and toxin contamination, as well as providing insight into its bioactivities and modes of action of metconazole against distinct Fusarium spp.

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