Selection and characterization of Oenococcus oeni strains for use as new malolactic fermentation starter cultures

Oenococcus oeni ( O. oeni ) strains are critically important for winemaking. They bring microbial stabilization, de-acidification and sensory improvement through malolactic fermentation (MLF) to almost all red wines and some white wines. In this study, 23 strains of O. oeni isolated from China were...

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Published in:Annals of microbiology 2016-09, Vol.66 (3), p.1285-1292
Main Authors: Wang, Panxue, Li, Aixia, Sun, Huiye, Dong, Mei, Wei, Xinyuan, Fan, Mingtao
Format: Article
Language:English
Subjects:
Amino acids
Applied Microbiology
Biogenic amines
Biomedical and Life Sciences
Enzymes
Ethylenediaminetetraacetic acid
Fermentation
Life Sciences
Medical Microbiology
Microbial Ecology
Microbial Genetics and Genomics
Microbiology
Mycology
Original Article
Wine and wine making
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Summary:Oenococcus oeni ( O. oeni ) strains are critically important for winemaking. They bring microbial stabilization, de-acidification and sensory improvement through malolactic fermentation (MLF) to almost all red wines and some white wines. In this study, 23 strains of O. oeni isolated from China were evaluated for use as MLF starter cultures. Strains were characterized and screened in wine-like media with increasing selective pressure, such as low pH and high ethanol concentration. Their abilities to conduct MLF were affected significantly by ethanol concentration and pH. Eight strains were selected and subsequently evaluated by detecting the enzyme-encoding genes involved in biogenic amines synthesis and wine aroma modification. Seven well-performing strains were further assessed in newly alcohol-fermented Cabernet Sauvignon wine. The results show that strains O. oeni CS-4b and O. oeni ME-5b exhibited better performance than the commercial starter O. oeni 31MBR in wine. Therefore, they were selected as potential MLF starters suitable for wine with high ethanol concentration and low pH.
ISSN:1590-4261
1869-2044
DOI:10.1007/s13213-016-1217-3