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The inhibitory effect of volatile organic compounds produced by Bacillus subtilis CL2 on pathogenic fungi of wolfberry
Journal of Basic Microbiology ( IF 3.1 ) Pub Date : 2020-12-28 , DOI: 10.1002/jobm.202000522
Lijun Ling 1, 2 , Yunhua Zhao 1 , Yixin Tu 1 , Caiyun Yang 1 , Wenxia Ma 1 , Shenglai Feng 1 , Lu Lu 1 , Ji Zhang 1, 2
Affiliation  

Bacillus subtilis strain CL2 is antagonistic to wolfberry postharvest pathogenic fungi. In this study, we isolated and screened this strain for in vitro experiments. The result of the two-sealed-base-plates method revealed that volatile organic compounds (VOCs) emitted from the strain CL2 inhibited the hyphal growth of four pathogenic fungi Mucor circinelloides LB1, Fusarium arcuatisporum LB5, Alternaria iridiaustralis LB7, and Colletotrichum fioriniae LB8. After exposure to VOCs for 5 days, the hyphal growth of the pathogen C. fioriniae LB8 was inhibited by 73%. Scanning electron microscopy revealed that the VOCs produced by B. subtilis CL2 caused the mycelium morphology of the pathogenic fungi to deform, twist, fold, and shrink. In the in vivo experiments, we noticed that VOCs could significantly reduce the weight loss rate of wolfberry fruits caused by the pathogenic fungus M. circinelloides LB1 and that the decay incidence rate were caused by the pathogenic fungi F. arcuatisporum LB5, A. iridiaustralis LB7, and C. fioriniae LB8. On the basis of the headspace-gas chromatography-ion mobility spectrometry analysis, seven VOCs produced by strain CL2 were identified. Among them, 2,3-butanedione and 3-methylbutyric acid are the main antifungal active substances. This study investigated the antifungal properties of VOCs produced by the strain CL2 on postharvest pathogenic fungi isolated from wolfberry fruits both in vivo and in vitro, thereby providing the theoretical basis for its future applications.

中文翻译:

枯草芽孢杆菌CL2产生的挥发性有机物对枸杞病原真菌的抑制作用

枯草芽孢杆菌CL2菌株对枸杞采后病原真菌具有拮抗作用。在这项研究中,我们分离并筛选了该菌株用于体外实验。两密封底板法结果表明,CL2菌株释放的挥发性有机化合物(VOCs)抑制了圆环毛霉LB1、弓形镰刀菌LB5、链格孢菌LB7和Colletotrichum fioriniae LB8四种病原真菌的菌丝生长。暴露于VOCs 5天后,病原体C. fioriniae LB8的菌丝生长被抑制了73%。扫描电镜显示枯草芽孢杆菌CL2产生的VOCs导致病原真菌菌丝形态变形、扭曲、折叠和收缩。在体内实验中,我们注意到VOCs可以显着降低由病原真菌M. circinelloides LB1引起的枸杞果实的失重率,并且腐烂发生率是由病原真菌F. arcuatisporum LB5、A. iridiaustralis LB7和C. fioriniae LB8引起的。 . 在顶空-气相色谱-离子迁移谱分析的基础上,鉴定出 CL2 菌株产生的 7 种 VOC。其中,2,3-丁二酮和3-甲基丁酸是主要的抗真菌活性物质。本研究在体内外研究了CL2菌株产生的VOCs对枸杞果实采后病原真菌的体内外抗真菌特性,为其未来的应用提供了理论依据。circinelloides LB1 和腐烂发生率是由致病真菌 F. arcuatisporum LB5、A. iridiaustralis LB7 和 C. fioriniae LB8 引起的。在顶空-气相色谱-离子迁移谱分析的基础上,鉴定出 CL2 菌株产生的 7 种 VOC。其中,2,3-丁二酮和3-甲基丁酸是主要的抗真菌活性物质。本研究在体内外研究了CL2菌株产生的VOCs对枸杞果实采后病原真菌的体内外抗真菌特性,为其未来的应用提供了理论依据。circinelloides LB1 和腐烂发生率是由致病真菌 F. arcuatisporum LB5、A. iridiaustralis LB7 和 C. fioriniae LB8 引起的。在顶空-气相色谱-离子迁移谱分析的基础上,鉴定出 CL2 菌株产生的 7 种 VOC。其中,2,3-丁二酮和3-甲基丁酸是主要的抗真菌活性物质。本研究在体内外研究了CL2菌株产生的VOCs对枸杞采后病原真菌的体内外抗真菌特性,为其未来的应用提供了理论依据。其中,2,3-丁二酮和3-甲基丁酸是主要的抗真菌活性物质。本研究在体内外研究了CL2菌株产生的VOCs对枸杞果实采后病原真菌的体内外抗真菌特性,为其未来的应用提供了理论依据。其中,2,3-丁二酮和3-甲基丁酸是主要的抗真菌活性物质。本研究在体内外研究了CL2菌株产生的VOCs对枸杞果实采后病原真菌的体内外抗真菌特性,为其未来的应用提供了理论依据。
更新日期:2020-12-28
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