Antipathogenic Activities of Volatile Organic Compounds Produced by Bacillus velezensis LT1 against Sclerotium rolfsii LC1, the Pathogen of Southern Blight in Coptis chinensis

文献类型： 外文期刊

第一作者： Tang, Tao

作者： Tang, Tao;Wang, Fanfan;Huang, Houyun;Guo, Jie;Guo, Xiaoliang;Duan, Yuanyuan;Wang, Xiaoyue;Wang, Qingfang;You, Jingmao;Tang, Tao;Wang, Fanfan;Xie, Nengneng;Guo, Jie;Guo, Xiaoliang;Duan, Yuanyuan;Wang, Qingfang;You, Jingmao

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关键词： Sclerotium rolfsii; Bacillus velezensis; volatileorganic compounds (VOCs); antifungal activities; Coptis chinensis

期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （ 影响因子：6.1； 五年影响因子：6.3 ）

ISSN： 0021-8561

年卷期： 2024 年 72 卷 18 期

页码：

收录情况： SCI

摘要： This study explores the antipathogenic properties of volatile organic compounds (VOCs) produced by Bacillus velezensis LT1, isolated from the rhizosphere soil of Coptis chinensis. The impact of these VOCs on the mycelial growth of Sclerotium rolfsii LC1, the causative agent of southern blight in C. chinensis, was evaluated using a double Petri-dish assay. The biocontrol efficacy of these VOCs was further assessed through leaf inoculation and pot experiments. Antifungal VOCs were collected using headspace solid-phase microextraction (SPME), and their components were identified via gas chromatography-mass spectrometry (GC-MS). The results revealed that the VOCs significantly inhibited the mycelial growth and sclerotia germination of S. rolfsii LC1 and disrupted the morphological integrity of fungal mycelia. Under the influence of these VOCs, genes associated with chitin synthesis were upregulated, while those related to cell wall degrading enzymes were downregulated. Notably, 2-dodecanone and 2-undecanone exhibited inhibition rates of 81.67% and 80.08%, respectively. This research provides a novel approach for the prevention and management of southern blight in C. chinensis, highlighting the potential of microbial VOCs in biocontrol strategies.

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