Antifungal effects of volatile organic compounds produced by Trichoderma koningiopsis T2 against Verticillium dahliae

• DOI: 10.3389/fmicb.2022.1013468
• Publication Date: 2022-09-21T13:03:13Z
• Authors: Wei-Liang Kong; Hang Ni; Wei-Yu Wang; Xiao-Qin Wu
• Keywords: Verticillium dahliae; Trichoderma

Volatile organic compounds (VOCs) produced by microorganisms are considered promising environmental-safety fumigants for controlling soil-borne diseases. Verticillium dahliae, a notorious fungal pathogen, causes economically important wilt diseases in agriculture and forestry industries. Here, we determined the antifungal activity of VOCs Trichoderma koningiopsis T2. The from T. T2 were trapped solid-phase microextraction (SPME) tentatively identified through gas chromatography-mass spectrometry (GC/MS). microsclerotia formation, cell wall-degrading enzymes melanin synthesis V. dahliae exposed to VOC mixtures selected single standards examined. results showed that strain significantly inhibited growth mycelium reduced severity tobacco cotton. Six individual volatilome T2, dominant 3-octanone, 3-methyl-1-butanol, butanoic acid ethyl ester 2-hexyl-furan. exert significant inhibitory effect on formation decreased activities pectin lyase endo-β-1,4-glucanase dahliae. also downregulated VdT3HR, VdT4HR, VdSCD genes related 29. 41-, 10. 49-, 3.11-fold, respectively. Therefore, has potential as biofumigant biocontrol disease.