Interactions during fermentation between pesticides and oenological yeasts producing H2S and SO2

• Published in: Applied microbiology and biotechnology Vol. 43; no. 2; pp. 370 - 373
• Main Authors: Cabras, P, Garau, V.L, Angioni, A, Farris, G.A, Budroni, M, Spanedda, L
• Format: Journal Article
• Language: English
• Published: Berlin Springer 1995
• Subjects: agrochemicals; Biodegradation of pollutants; Biological and medical sciences; Biotechnology; Environment and pollution; food microbiology; food processing; Fundamental and applied biological sciences. Psychology; horticultural crops; Industrial applications and implications. Economical aspects; insecticide degradation; pesticides; sulfur containing insecticides; Biodegradation; Yeast; Insecticide; Pesticides; Fermentation; Metabolism; Fungi; Pollutant; Ascomycetes; Organophosphorus compounds; Sulfur; Saccharomyces cerevisiae; Thallophyta
• ISSN: 0175-7598; 1432-0614
• DOI: 10.1007/bf00172841

The degradative action of two strains of Saccharomyces cerevisiae, producers of large quantities of H2S and SO2, on eight sulphur-containing insecticides (chlorpyrifos-methyl, dimethoate, fenitrothion, fenthion, malathion, methidathion, parathion, and quinalphos) was studied. Moreover, the influence of these compounds on the fermentative activity of the yeasts was investigated. The yeasts adsorbed and degraded the studied insecticides to various extents, but their fermentative activity was not affected. A moderate adsorption (approximately 10% of the residue) was observed for chlorpyrifos-methyl, fenitrothion, parathion, and quinalphos. When adsorbed, the insecticides were also degraded by about 50%. The degraded pesticides belong to the thiophosphates, while the dithiophosphates showed higher stability. The two yeast strains showed analogous degradative actions.