title: Effect of sequential fermentations and grape cultivars on volatile compounds and sensory profiles of Danish wines.
abstract: BACKGROUND
  There has been an increasing interest in the use of selected non-Saccharomyces yeasts in co-culture with Saccharomyces cerevisiae. In this work, three non-Saccharomyces yeast strains (Metschnikowia viticola, Metschnikowia fructicola and Hanseniaspora uvarum) indigenously isolated in Denmark were used in sequential fermentations with S. cerevisiae on three cool-climate grape cultivars, Bolero, Rondo and Regent. During the fermentations, the yeast growth was determined as well as key oenological parameters, volatile compounds and sensory properties of finished rosé wines.
  
  
  RESULTS
  The different non-Saccharomyces strains and cool-climate grape cultivars produced wines with a distinctive aromatic profile. A total of 67 volatile compounds were identified, including 43 esters, 14 alcohols, five acids, two ketones, a C13-norisoprenoid, a lactone and a sulfur compound. The use of M. viticola in sequential fermentation with S. cerevisiae resulted in richer berry and fruity flavours in wines. The sensory plot showed a more clear separation among wine samples by grape cultivars compared with yeast strains.
  
  
  CONCLUSIONS
  Knowledge on the influence of indigenous non-Saccharomyces strains and grape cultivars on the flavour generation contributed to producing diverse wines in cool-climate wine regions. © 2017 Society of Chemical Industry.
authors.affiliation: Department of Food Science, Faculty of Science, University of Copenhagen, Rolighedsvej, Frederiksberg C, Denmark.
authors.forename: Jing
authors.initials: J
authors.lastname: Liu
authors.affiliation: Department of Food Science, Faculty of Science, University of Copenhagen, Rolighedsvej, Frederiksberg C, Denmark.
authors.forename: Nils
authors.initials: N
authors.lastname: Arneborg
authors.affiliation: Department of Plant and Environmental Science, Faculty of Science, University of Copenhagen, Højbakkegård Alle 13, Tåstrup, Denmark.
authors.forename: Torben B
authors.initials: TB
authors.lastname: Toldam-Andersen
authors.affiliation: Department of Food Science, Faculty of Science, University of Copenhagen, Rolighedsvej, Frederiksberg C, Denmark.
authors.forename: Mikael A
authors.initials: MA
authors.lastname: Petersen
authors.affiliation: Department of Food Science, Faculty of Science, University of Copenhagen, Rolighedsvej, Frederiksberg C, Denmark.
authors.forename: Wender Lp
authors.initials: WL
authors.lastname: Bredie
mesh_terms: D000328:Adult; D003718:Denmark; D005260:Female; D005285:Fermentation; D005421:Flavoring Agents / Q000737:chemistry* / Q000378:metabolism; D055321:Hanseniaspora / Q000254:growth & development / Q000378:metabolism*; D006801:Humans; D008297:Male; D055163:Metschnikowia / Q000254:growth & development / Q000378:metabolism*; D012441:Saccharomyces cerevisiae / Q000254:growth & development / Q000378:metabolism*; D013649:Taste; D027843:Vitis / Q000737:chemistry* / Q000378:metabolism / Q000382:microbiology; D055549:Volatile Organic Compounds / Q000737:chemistry* / Q000378:metabolism; D014920:Wine / Q000032:analysis* / Q000382:microbiology
chemical_list: D005421:Flavoring Agents; D055549:Volatile Organic Compounds
keywords: cool-climate grape cultivars; non-Saccharomyces; rosé wine; sensory evaluation; sequential fermentations; volatile compounds