title: Dynamic analysis of physiological properties of Torulaspora delbrueckii in wine fermentations and its incidence on wine quality.
abstract: This work examines the physiology of a new commercial strain of Torulaspora delbrueckii in the production of red wine following different combined fermentation strategies. For a detailed comparison, several yeast metabolites and the strains implantation were measured over the entire fermentation period. In all fermentations in which T. delbrueckii was involved, the ethanol concentration was reduced; some malic acid was consumed; more pyruvic acid was released, and fewer amounts of higher alcohols were produced. The sensorial properties of final wines varied widely, emphasising the structure of wine in sequential fermentations with T. delbrueckii. These wines presented the maximum overall impression and were preferred by tasters. Semi-industrial assays were carried out confirming these differences at a higher scale. No important differences were observed in volatile aroma composition between fermentations. However, differences in mouthfeel properties were observed in semi-industrial fermentations, which were correlated with an increase in the mannoprotein content of red wines fermented sequentially with T. delbrueckii.
authors.affiliation: Department of Microbiology, Biology Faculty, Complutense University of Madrid, 28040, Madrid, Spain.
authors.forename: Ignacio
authors.initials: I
authors.lastname: Belda
authors.forename: Eva
authors.initials: E
authors.lastname: Navascués
authors.forename: Domingo
authors.initials: D
authors.lastname: Marquina
authors.forename: Antonio
authors.initials: A
authors.lastname: Santos
authors.forename: Fernando
authors.initials: F
authors.lastname: Calderon
authors.forename: Santiago
authors.initials: S
authors.lastname: Benito
mesh_terms: D000438:Alcohols / Q000032:analysis; D004271:DNA, Fungal / Q000737:chemistry / Q000235:genetics; D004275:DNA, Ribosomal / Q000737:chemistry / Q000235:genetics; D005285:Fermentation; D063427:Food Quality; D020459:Genes, rRNA; D008293:Malates / Q000378:metabolism; D008969:Molecular Sequence Data; D019289:Pyruvic Acid / Q000378:metabolism; D012331:RNA, Fungal / Q000235:genetics; D012335:RNA, Ribosomal / Q000235:genetics; D017422:Sequence Analysis, DNA; D055319:Torulaspora / Q000502:physiology*; D055549:Volatile Organic Compounds / Q000032:analysis; D014920:Wine / Q000382:microbiology*
chemical_list: D000438:Alcohols; D004271:DNA, Fungal; D004275:DNA, Ribosomal; D008293:Malates; D012331:RNA, Fungal; D012335:RNA, Ribosomal; C065096:RNA, ribosomal, 26S; D055549:Volatile Organic Compounds; C030298:malic acid; D019289:Pyruvic Acid