期刊
FEMS YEAST RESEARCH
卷 17, 期 4, 页码 -出版社
OXFORD UNIV PRESS
DOI: 10.1093/femsyr/fox018
关键词
transcriptome; Saccharomyces cerevisiae; Dekkera bruxellensis; alcoholic fermentation; aromatic profile; double compartment membrane system; volatile phenols
资金
- Slovene Research Agency [31913]
- bilateral project Portugal - Slovenia [BI-PT/10-11-001]
- Slovenian agency for human resource development [1101-11/2010-1]
A double compartment membrane system was constructed in order to systematically study possible microbial interactions between yeasts Saccharomyces cerevisiae and Dekkera bruxellensis and their impact on wine aroma. The presence of D. bruxellensis induced 77 transcripts of S. cerevisiae. These were mostly of unknown function; however, some were involved in thiamine biosynthesis and in amino acid and polyamine transport, suggesting a competitive relationship between the two yeast species. Among the transcripts with no biological function, 14 of them were found to be the members of the PAU gene family that is associated with response to anaerobiosis stress. In separated cultures, S. cerevisiae produced glycerol which was subsequently consumed by D. bruxellensis. The concentration of ethylphenols was reduced and we assume that they were absorbed onto the surfaces of S. cerevisiae yeast walls. Also in separated cultures, D. bruxellensis formed a typical profile of aromatic esters with decreased levels of acetate esters and increased level of ethyl esters.
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