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Front Microbiol

Title:		Identification of Volatile Organic Compounds in Extremophilic Bacteria and Their Effective Use in Biocontrol of Postharvest Fungal Phytopathogens
Author(s):		Toral L; Rodriguez M; Martinez-Checa F; Montano A; Cortes-Delgado A; Smolinska A; Llamas I; Sampedro I;
Address:		"Xtrem Biotech S.L., European Business Innovation Center, Avenida de la Innovacion, Granada, Spain. Department of Microbiology, Faculty of Pharmacy, Campus de Cartuja s/n, Granada, Spain. Biomedical Research Center (CIBM), Avenida del Conocimiento s/n, Granada, Spain. Department of Food Biotechnology, Instituto de la Grasa, Sevilla, Spain. Department of Pharmacology and Toxicology, Maastricht University, Maastricht, Netherlands"
Journal Title:		Front Microbiol
Year:		2021
Volume:		20211112
Issue:
Page Number:		773092 -
DOI:		10.3389/fmicb.2021.773092
ISSN/ISBN:		1664-302X (Print) 1664-302X (Electronic) 1664-302X (Linking)
Abstract:		"Phytopathogenic fungal growth in postharvest fruits and vegetables is responsible for 20-25% of production losses. Volatile organic compounds (VOCs) have been gaining importance in the food industry as a safe and ecofriendly alternative to pesticides for combating these phytopathogenic fungi. In this study, we analysed the ability of some VOCs produced by strains of the genera Bacillus, Peribacillus, Pseudomonas, Psychrobacillus and Staphylococcus to inhibit the growth of Alternaria alternata, Botrytis cinerea, Fusarium oxysporum, Fusarium solani, Monilinia fructicola, Monilinia laxa and Sclerotinia sclerotiorum, in vitro and in vivo. We analysed bacterial VOCs by using GC/MS and 87 volatile compounds were identified, in particular acetoin, acetic acid, 2,3-butanediol, isopentanol, dimethyl disulphide and isopentyl isobutanoate. In vitro growth inhibition assays and in vivo experiments using cherry fruits showed that the best producers of VOCs, Bacillus atrophaeus L193, Bacillus velezensis XT1 and Psychrobacillus vulpis Z8, exhibited the highest antifungal activity against B. cinerea, M. fructicola and M. laxa, which highlights the potential of these strains to control postharvest diseases. Transmission electron microscopy micrographs of bacterial VOC-treated fungi clearly showed antifungal activity which led to an intense degeneration of cellular components of mycelium and cell death"
Keywords:		antifungal activity biocontrol fungal phytopathogens postharvest diseases volatile compounds;
Notes:		"PubMed-not-MEDLINEToral, Laura Rodriguez, Miguel Martinez-Checa, Fernando Montano, Alfredo Cortes-Delgado, Amparo Smolinska, Agnieszka Llamas, Inmaculada Sampedro, Inmaculada eng Switzerland 2021/12/07 Front Microbiol. 2021 Nov 12; 12:773092. doi: 10.3389/fmicb.2021.773092. eCollection 2021"