| Title: | Biofumigation activities of volatile compounds from two Trichoderma afroharzianum strains against Fusarium infections in fresh chilies |
| Author(s): | Khruengsai S; Pripdeevech P; D'Souza PE; Panuwet P; |
| Address: | "School of Science, Mae Fah Luang University, Chiang Rai, Thailand. Center of Chemical Innovation for Sustainability (CIS), Mae Fah Luang University, Chiang Rai, Thailand. Laboratory of Exposure Assessment and Development for Environmental Research (LEADER), Gangarosa Department of Environmental Health, Rollins School of Public Health, Emory University, Atlanta, GA, USA" |
| ISSN/ISBN: | 1097-0010 (Electronic) 0022-5142 (Linking) |
| Abstract: | "BACKGROUND: Two Fusarium fungi, F. oxysporum and F. proliferatum, have been recognized as major pathogenic fungi that cause postharvest decay of chili fruits. Ozone and some toxic chemicals are used to control pathogenic infections, leading to longer storage lives of agricultural commodities. However, these chemicals may pose some risks to the applicators and the environment. Therefore, alternative, easy-to-use fumigants for effective control of Fusarium infections in harvested fresh chilies are needed. RESULTS: Two endophytic fungi, Trichoderma afroharzianum strain MFLUCC19-0090 and T. afroharzianum strain MFLUCC19-0091, were isolated from Schefflera leucantha leaves. Their volatile compounds were investigated for antifungal activities against F. oxysporum and F. proliferatum. In vitro results showed that the volatile compounds produced by each strain inhibited pathogen growth. Additionally, the Trichoderma-derived volatile compounds significantly reduced Fusarium-related disease severity and incidence percentages in the inoculated fresh chilies. Antifungal properties of the volatile compounds were found to be specific to the species of the tested pathogens (MFLUCC19-0090 greatly suppressed F. oxysporum and MFLUCC19-0091 greatly suppressed F. proliferatum). Seventy-three volatile compounds were detected from both strains. Among the major volatile compounds detected, phenyl ethyl alcohol was found to possess the strongest antifungal activity against both pathogens. CONCLUSION: These Trichoderma-derived volatile compounds may be used as alternative fumigants for controlling Fusarium rot in harvested fresh chilies. The successful use of volatile compounds as biofumigants can prevent significant market losses and, more importantly, may reduce the health hazards caused by Fusarium-associated mycotoxin exposures among consumers. (c) 2021 Society of Chemical Industry" |
| Keywords: | Antifungal Agents/chemistry/metabolism/*pharmacology Araliaceae/microbiology Benzoquinones Capsicum/*microbiology Cyclohexanones Endophytes/chemistry/isolation & purification/metabolism Fusarium/*drug effects/physiology Hypocreales/chemistry/isolation & p; |
| Notes: | "MedlineKhruengsai, Sarunpron Pripdeevech, Patcharee D'Souza, Priya E Panuwet, Parinya eng RGJ PHD/0193/2560/Thailand Research Fund/ England 2021/04/01 J Sci Food Agric. 2021 Nov; 101(14):5861-5871. doi: 10.1002/jsfa.11238. Epub 2021 Apr 15" |
