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Outlining the influence of non-conventional yeasts in wine ageing over lees

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Belda Aguilar, Ignacio and Navascués, Eva and Marquina Díaz, Domingo and Santos de la Sen, Antonio (2016) Outlining the influence of non-conventional yeasts in wine ageing over lees. Yeast, 33 (7). pp. 329-338. ISSN 0749-503X, ESSN: 1097-0061

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Official URL: http://onlinelibrary.wiley.com/doi/10.1002/yea.3165/full



Abstract

During the last decade, the use of innovative yeast cultures of both Saccharomyces cerevisiae and non-Saccharomyces yeasts as alternative tools to manage the winemaking process have turned the oenology industry. Although the contribution of different yeast species to wine quality during fermentation is increasingly understood, information about their role in wine ageing over lees is really scarce. This work aims to analyse the incidence of three non-Saccharomyces yeast species of oenological interest (Torulaspora delbrueckii, Lachancea thermotolerans and Metschnikowia pulcherrima) and of a commercial mannoprotein-overproducer S. cerevisiae strain compared with a conventional industrial yeast strain during wine ageing over lees. To evaluate their incidence in mouthfeel properties of wine after 4 months of ageing, the mannoprotein content of wines was evaluated, together with other wine analytic parameters, such as colour and aroma, biogenic amines and amino acids profile. Some differences among the studied parameters were observed during the study, especially regarding the mannoprotein concentration of wines. Our results suggest that the use of T. delbrueckii lees in wine ageing is a useful tool for the improvement of overall wine quality by notably increasing mannoproteins, reaching values higher than obtained using a S. cerevisiae overproducer strain.


Item Type:Article
Uncontrolled Keywords:Torulaspora delbrueckii; Lachancea thermotolerans; Metschnikowia pulcherrima; Ageing over lees; Mannoprotein; Amino acids
Subjects:Medical sciences > Biology > Microbiology
ID Code:42319
Deposited On:25 Apr 2017 10:23
Last Modified:10 Dec 2018 15:30

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