Screening for yeast with antibacterial properties from an ethanol distillery.
A general screening for the expression of antibacterial activity and non-flocculating type of yeast strains from must and fermented broth of alcohol distilleries was performed. From 60 strains only Saccharomyces sp. M26 presented a inhibitory halo in Lactobacillus fermentum culture and significant reduction in the culture turbidity (71%) and specific growth rate (56%) when compared to the control. Freezing did not affect the antibacterial activity of the Saccharomyces sp. M26 extract and heating at 90 degrees C for 20 min completely destroyed this activity. It is expected the decrease of lactic acid bacteria growth in the S. cerevisiae alcoholic fermentation should allow for better control of these bacteria in the process.
de Oliva Neto
Pedro
P
Department Ciências Biológicas, Universidade Estadual Paulista, Assis, SP, CEP 19800-000, Brazil. poliva@assis.unesp.br
Ferreira
Mirella Amorim
MA
Yokoya
Fumio
F
D000434:Alcoholic Beverages; D000900:Anti-Bacterial Agents / Q000378:metabolism*; D000431:Ethanol / Q000378:metabolism*; D005285:Fermentation; D007778:Lactobacillus; D016014:Linear Models; D012441:Saccharomyces cerevisiae / Q000254:growth & development / Q000378:metabolism*; D013045:Species Specificity; D015003:Yeasts / Q000254:growth & development / Q000378:metabolism*
D000900:Anti-Bacterial Agents; D000431:Ethanol