Document Detail


Sour rot-damaged grapes are sources of wine spoilage yeasts.
MedLine Citation:
PMID:  18554306     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Yeast species of sound and sour rot-damaged grapes were analysed during fermentation and grape ripening in the vineyard, using general and selective culture media. During 2003 and 2004 vintages, microvinifications were carried out with sound grapes to which different amounts of grapes with sour rot were added. The wine spoilage species Zygosaccharomyces bailii was only recovered during fermentations with sour rot, reaching 5.00 log CFU mL(-1) (2003) and 2.48 log CFU mL(-1) (2004) at the end of fermentation. The study of yeast populations during the sour rot ripening process (2005 vintage) showed that the veraison-damaged grapes always exhibited higher total yeast counts and a much greater diversity of species. From a total of 22 ascomycetous species, 17 were present only in damaged grapes. The most frequent species were Issatchenkia occidentalis and Zygoascus hellenicus. The spoilage species Z. bailii and Zygosaccharomyces bisporus were consistently isolated exclusively from damaged grapes. This work demonstrates that one of the most dangerous wine spoilage species, Z. bailii, is strongly associated with sour rot grapes and survives during fermentation with Saccharomyces cerevisiae. The use of selective media provides a more accurate characterization of grape contamination species.
Authors:
André Barata; Sara González; Manuel Malfeito-Ferreira; Amparo Querol; Virgílio Loureiro
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Review     Date:  2008-06-12
Journal Detail:
Title:  FEMS yeast research     Volume:  8     ISSN:  1567-1356     ISO Abbreviation:  FEMS Yeast Res.     Publication Date:  2008 Nov 
Date Detail:
Created Date:  2008-12-04     Completed Date:  2009-01-16     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101085384     Medline TA:  FEMS Yeast Res     Country:  England    
Other Details:
Languages:  eng     Pagination:  1008-17     Citation Subset:  IM    
Affiliation:
Laboratório de Microbiologia, Departamento de Botânica e Engenharia Biológica, Instituto Superior de Agronomia, Technical University of Lisbon, Lisboa, Portugal. abbarata@isa.utl.pt
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MeSH Terms
Descriptor/Qualifier:
Culture Media
DNA, Fungal / analysis,  genetics
Food Microbiology
Polymerase Chain Reaction
Polymorphism, Restriction Fragment Length
Vitis / metabolism*,  microbiology*
Wine / microbiology*
Zygosaccharomyces / classification,  genetics,  growth & development*,  isolation & purification*
Chemical
Reg. No./Substance:
0/Culture Media; 0/DNA, Fungal

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