title: Effect of Saccharomyces strains on the quality of red wines aged on lees.
abstract: Ageing on lees involves ageing the wine in contact with yeast cells after fermentation. If combined with the addition of oak chips, it can soften the wood flavour and increase the aromatic complexity of wine. The aim of the present work is to optimise both ageing techniques through selection of an adequate Saccharomyces cerevisiae strain. The study lasted 6 months and content of polysaccharides, anthocyanins, proanthocyanidins, volatile compounds, colour parameters and sensory analysis, were periodically evaluated. Among the strains tested, G37 showed the highest release of polysaccharides (24.4±5.5 mg l(-1)). Vanillin, syringaldehyde and furfuryl alcohol increased with ageing time in 7VA2 treatment. The wine aged with CTPL14 strain presented fewer monomeric and oligomeric proanthocyanidins (12.4±0.6 and 83.4±8.3 mg l(-1), respectively), and showed the lowest astringency and bitterness sensations. Results show an improvement in the sensory profile of the red wine aged with a combination of these two techniques.
authors.affiliation: Dpto. Tecnología de Alimentos, Escuela Técnica Superior de Ingenieros Agrónomos, Universidad Politécnica de Madrid, Ciudad Universitaria S/N, 28040 Madrid, Spain.
authors.forename: I
authors.initials: I
authors.lastname: Loira
authors.forename: R
authors.initials: R
authors.lastname: Vejarano
authors.forename: A
authors.initials: A
authors.lastname: Morata
authors.forename: J M
authors.initials: JM
authors.lastname: Ricardo-da-Silva
authors.forename: O
authors.initials: O
authors.lastname: Laureano
authors.forename: M C
authors.initials: MC
authors.lastname: González
authors.forename: J A
authors.initials: JA
authors.lastname: Suárez-Lepe
mesh_terms: D000872:Anthocyanins / Q000032:analysis / Q000378:metabolism; D005285:Fermentation; D005511:Food Handling / Q000379:methods*; D006801:Humans; D011786:Quality Control; D029963:Quercus / Q000737:chemistry; D012441:Saccharomyces cerevisiae / Q000378:metabolism*; D013649:Taste; D014920:Wine / Q000032:analysis* / Q000382:microbiology; D014934:Wood / Q000737:chemistry
chemical_list: D000872:Anthocyanins