期刊
FERMENTATION-BASEL
卷 7, 期 3, 页码 -出版社
MDPI
DOI: 10.3390/fermentation7030126
关键词
Metschnikowia pulcherrima; Meyerozyma guilliermondii; fermentation; ethanol
资金
- Washington State Grape and Wine Research Program
- Lallemand (Montreal, QC, Canada)
- Washington State University through the School of Food Science (Pullman, WA, USA)
- Irrigated Agriculture Research and Extension Center (Prosser, WA, USA)
- USDA National Institute of Food and Agriculture, Hatch project of the Agricultural Research Center, Washington State University, Pullman, WA, USA [1016366, 0846]
The study suggests that using different yeast inoculation methods can lower the ethanol content of Merlot wines, while delayed inoculation of yeast may result in higher concentrations of ethyl acetate, without significant impact on sensory attributes.
Inoculation of selected non-Saccharomyces yeasts with Saccharomyces cerevisiae as means to produce Merlot wines with reduced ethanol contents was investigated. Fermentations of grape musts (25.4 degrees Brix, pH 3.50, and 4.23 g/L titratable acidity) were conducted in stainless steel tanks inoculated with Metschnikowia pulcherrima strains P01A016 or NS-MP or Meyerozyma guilliermondii P40D002 with S. cerevisiae Syrah added after three days. After fermentation, wines with Mt. pulcherrima contained 13.8% (P01A016) or 13.9% (NS-MP) v/v ethanol, respectively, amounts which were lower than in wines with S. cerevisiae alone (14.9% v/v). Delayed inoculation of must with S. cerevisiae (day 3) or musts with My. guilliermondii contained elevated concentrations of ethyl acetate (145 and 148 mg/L, respectively), concentrations significantly higher than those with S. cerevisiae inoculated on day 0 or with either strain of Mt. pulcherrima. Descriptive sensory analysis revealed a significant effect due to panelist but not due to Mt. pulcherrima or My. guilliermondii. This research indicates the potential for commercial application of these yeasts towards the production of reduced alcohol wines but without imparting negative sensory attributes.
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