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Bioactivity and Mechanisms of Botanical Fungicide Magnolol against Trichoderma hamatum as a Novel Pathogen of Sweet Potato

文献类型： 外文期刊

作者： Peng, Guanxing 1 ; Wang, Weizhen 1 ; Yin, Xianhui 1 ; Long, Youhua 1 ; Wang, Haidong 1 ; Chen, Xiang 1 ; Sun, Yanting 1 ; Li, Yun 2 ; Li, Xiaohui 2 ; Yang, Hang 2 ;

作者机构： 1.Guizhou Univ, Inst Crop Protect, Coll Agr, Guiyang 550025, Peoples R China

2.Guizhou Acad Agr Sci, Inst Biotechnol, Guiyang 550006, Peoples R China

关键词： sweet potato; Trichoderma hamatum; botanicalcompound; magnolol; food preservation

期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （ 影响因子：6.2； 五年影响因子：6.4 ）

ISSN： 0021-8561

年卷期： 2025 年 73 卷 22 期

页码：

收录情况： SCI

摘要： Sweet potato is a vital crop worldwide, but its storage roots are susceptible to infection by numerous fungal pathogens, leading to substantial postharvest losses. In this study, a highly pathogenic fungal strain was isolated from infected sweet potato storage roots. Through morphological and molecular characterization, the strain was identified as Trichoderma hamatum, representing the first report of this species as a sweet potato pathogen. The botanical compound magnolol exhibited a strong antifungal activity against T. hamatum, demonstrating an excellent protective efficacy against the pathogen-induced disease. Electron microscopy analyses indicated that magnolol could effectively disrupt ultrastructure of T. hamatum. Transcriptomic analyses revealed multiple biological pathways modulated by magnolol. In particular, magnolol could damage the cell membrane integrity of T. hamatum and disturb its energy metabolism. These findings provide critical insights for managing postharvest diseases of sweet potato and highlight the potential of magnolol as a natural antifungal agent for food preservation.

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