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FEMS Yeast Res

Title:		Production of volatile organic sulfur compounds (VOSCs) by basidiomycetous yeasts
Author(s):		Buzzini P; Romano S; Turchetti B; Vaughan A; Pagnoni UM; Davoli P;
Address:		"Dipartimento di Biologia Vegetale e Biotecnologie Agroambientali, Sezione di Microbiologia Applicata, Universita di Perugia, Borgo XX Giugno 74, 06121 Perugia, Italy. pbuzzini@unipg.it"
Journal Title:		FEMS Yeast Res
Year:		2005
Volume:		5
Issue:		4-May
Page Number:		379 - 385
DOI:		10.1016/j.femsyr.2004.10.011
ISSN/ISBN:		1567-1356 (Print) 1567-1356 (Linking)
Abstract:		"Thirty-seven basidiomycetous yeasts belonging to 30 species of seven genera were grown on media containing l-cysteine or l-methionine as sole nitrogen sources with the objective of evaluating volatile organic sulfur compound (VOSC) production. The headspace of yeast cultures was analyzed by the solid-phase microextraction (SPME) sampling method, and volatile compounds were quantified and identified by GC-MS techniques. Ten strains assimilating L-methionine produced the following VOSCs: 3-(methylthio)-1-propanol, methanethiol, S-methyl thioacetate, dimethyl disulfide, dimethyl trisulfide, allyl methyl sulphide and 4,5-dihydro-3(2H)-thiophenone. Production was <1 mgl(-1) except for 3-(methylthio)-1-propanol of which between 40 and 400 mgl(-1) was synthesized. Higher alcohols (isobutyl alcohol, isoamyl alcohol and active amyl alcohol) and esters (ethyl acetate, ethyl propionate, n-propyl acetate, isobutyl acetate, n-propyl propionate, n-butyl acetate, isoamyl acetate, amyl acetate, isoamyl propionate, amyl propionate and 2-phenylmethyl acetate) were also sporadically produced. This is the first report of VOSCs production by basidiomycetous yeasts. Consequently, basidiomycetous yeasts may be considered an interesting new group of microbial VOSCs producers for the flavor industry"
Keywords:		Basidiomycota/classification/growth & development/*metabolism Culture Media Cysteine/metabolism Flavoring Agents Methionine/metabolism Organic Chemicals/*metabolism Sulfur/*metabolism Volatilization;
Notes:		"MedlineBuzzini, Pietro Romano, Sergio Turchetti, Benedetta Vaughan, Ann Pagnoni, Ugo Maria Davoli, Paolo eng Evaluation Study England 2005/02/05 FEMS Yeast Res. 2005 Feb; 5(4-5):379-85. doi: 10.1016/j.femsyr.2004.10.011"