Effect of yeast assimilable nitrogen on the synthesis of phenolic aroma compounds by Hanseniaspora vineae strains

葡萄酒 苹果酸发酵 酿酒 食品科学 发酵 酵母 芳香 酿酒酵母 酿酒发酵 生物 葡萄酒故障 游离氨基氮 乙酸乙酯 苯甲醇 酿酒酵母 生物化学 细菌 乳酸 遗传学 催化作用
作者
Valentina Martín,Eduardo Boido,Facundo Giorello,Albert Mas,Eduardo Dellacassa,Francisco Carrau
出处
期刊:Yeast [Wiley]
卷期号:33 (7): 323-328 被引量:38
标识
DOI:10.1002/yea.3159
摘要

Abstract In several grape varieties, the dominating aryl alkyl alcohols found are the volatile group of phenylpropanoid‐related compounds, such as glycosylated benzyl and 2‐phenylethyl alcohol, which contribute to wine with floral and fruity aromas after being hydrolysed during fermentation. Saccharomyces cerevisiae is largely recognized as the main agent in grape must fermentation, but yeast strains belonging to other genera, including Hanseniaspora , are known to predominate during the first stages of alcoholic fermentation. Although non‐ Saccharomyces yeast strains have a well‐recognized genetic diversity, understanding of their impact on wine flavour richness is still emerging. In this study, 11 Hansenisapora vineae strains were used to ferment a chemically defined simil‐grape fermentation medium, resembling the nutrient composition of grape juice but devoid of grape‐derived secondary metabolites. GC–MS analysis was performed to determine volatile compounds in the produced wines. Our results showed that benzyl alcohol, benzyl acetate and 2‐phenylethyl acetate are significantly synthesized by H. vineae strains. Levels of these compounds found in fermentations with 11 H. vineae different strains were one or two orders of magnitude higher than those measured in fermentations with a known S. cerevisiae wine strain. The implications for winemaking in response to the negative correlation of benzyl alcohol, benzyl acetate and 2‐phenylethyl acetate production with yeast assimilable nitrogen concentrations are discussed. Copyright © 2016 John Wiley & Sons, Ltd.
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