BIO Web Conf.
Volume 12, 201941st World Congress of Vine and Wine
|Number of page(s)||3|
|Published online||19 February 2019|
Influence of supplementation with two specific inactivated dry yeast and grape-skin extract on the color and composition of red wine
1 Departament de Bioquímica i Biotecnologia, Facultat d'Enologia de Tarragona, Universitat Rovira i Virgili, C/Marcel.li Domingo, 1. 43007 Tarragona, Spain
2 Lallemand Bio S.L. C/ Galileu 303. 1a planta, 08028-Barcelona. España
Wines from grapes of Cabernet Sauvignon of the AOC Tarragona were elaborated with supplementation or not of two specific inactivated dry yeasts (Optired® and Optimum Red®; Lallemand Inc.) or with an experimental grape-skin extract. All the wines treated were significantly less astringent than the control wine because both inactivated dry yeast and the skin extract released polysaccharides which probably inhibit interactions between salivary proteins and tannins, and because their presence decrease the proportion of seed tannins and increase the proportion of skin tannins in the final wines.
© The Authors, published by EDP Sciences, 2019
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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