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Selected non-Saccharomyces wine yeasts in controlled multistarter fermentations with Saccharomyces cerevisiae

Comitini, Francesca and Gobbi, Mirko and Domizio, Paola and Romani, Cristina and Lencioni, Livio and Mannazzu, Ilaria Maria and Ciani, Maurizio (2011) Selected non-Saccharomyces wine yeasts in controlled multistarter fermentations with Saccharomyces cerevisiae. Food Microbiology, Vol. 28 (5), p. 873-882. eISSN 1095-9998. Article.

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DOI: 10.1016/j.fm.2010.12.001

Abstract

Non-Saccharomyces yeasts are metabolically active during spontaneous and inoculated must fermentations, and by producing a plethora of by-products, they can contribute to the definition of the wine aroma. Thus, use of Saccharomyces and non-Saccharomyces yeasts as mixed starter cultures for inoculation of wine fermentations is of increasing interest for quality enhancement and improved complexity of wines. We initially characterized 34 non-Saccharomyces yeasts of the genera Candida, Lachancea (Kluyveromyces), Metschnikowia and Torulaspora, and evaluated their enological potential. This confirmed that non-Saccharomyces yeasts from wine-related environments represent a rich sink of unexplored biodiversity for the winemaking industry. From these, we selected four non-Saccharomyces yeasts to combine with starter cultures of Saccharomyces cerevisiae in mixed fermentation trials. The kinetics of growth and fermentation, and the analytical profiles of the wines produced indicate that these non-Saccharomyces strains can be used with S. cerevisiae starter cultures to increase polysaccharide, glycerol and volatile compound production, to reduce volatile acidity, and to increase or reduce the total acidity of the final wines, depending on yeast species and inoculum ratio used. The overall effects of the non-Saccharomyces yeasts on fermentation and wine quality were strictly dependent on the Saccharomyces/non-Saccharomyces inoculum ratio that mimicked the differences of fermentation conditions (natural or simultaneous inoculated fermentation).

Item Type:Article
ID Code:5451
Status:Published
Refereed:Yes
Uncontrolled Keywords:Non-Saccharomyces selection, mixed fermentation, Torulaspora delbrueckii, Lachancea (Kluyveromyces) thermotolerans, Candida zemplinina, Metschnikowia pulcherrima, Wine yeasts
Subjects:Area 07 - Scienze agrarie e veterinarie > AGR/16 Microbiologia agraria
Divisions:001 Università di Sassari > 01 Dipartimenti > Scienze ambientali agrarie e biotecnologie agro-alimentari
Publisher:Elsevier
eISSN:1095-9998
Copyright Holders:© 2010 Elsevier Ltd.
Deposited On:21 Feb 2011 09:28

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