English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/149865
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:
Title

Fate of the glutathione released from inactive dry yeast preparations during the alcoholic fermentation of white musts

AuthorsRodríguez-Bencomo, Juan José ; Andújar-Ortiz, Inmaculada ; Sánchez-Patán, Fernando ; Moreno-Arribas, M. Victoria ; Pozo-Bayón, Mª Ángeles
KeywordsOxidation
Wine
Inactive dry yeast preparations
Alcoholic fermentation
Glutathione
Issue Date2016
PublisherJohn Wiley & Sons
CitationAustralian Journal of Grape and Wine Research 22(1): 46-51 (2016)
Abstract[Background and Aims]: Inactive dry yeast (IDY) preparations are widely used in the winemaking industry. Among them, glutathione (GSH)-enriched IDY (g-IDY) preparations are claimed to preserve the aroma and colour of white wines due to their antioxidant properties. It remains uncertain, however, if alcoholic fermentation (AF) influences the fate of the GSH released by IDYs and the impact of these preparations on the oxidation status of the wine, which constitutes the aim of this study. [Methods and Results]: The evolution of the GSH concentration of white musts treated with two types of IDYs (a glutathione-enriched IDY, g-IDY, and a fermentative nutrient n-IDY without GSH) and of a control must was determined during AF. In addition, the oxidation status of the musts and the formation of grape reaction product (GRP) derivatives were also monitored. The addition of g-IDYs had little effect on the concentration of reduced GSH in the wines at the end of fermentation. The treatment of musts with IDY preparations, however, reduced the formation of derivatives of GRP and produced more reductive conditions during AF compared with that of control samples. [Conclusions]: These results indicate that GSH released by IDYs is not available at the end of AF, but other yeast components from these preparations could be involved in the greater antioxidant status of musts treated with IDYs. [Significance of the Study]: This study helps to understand the impact of IDY preparations during winemaking, which will assist the optimisation of their formulation for specific wine applications.
URIhttp://hdl.handle.net/10261/149865
DOI10.1111/ajgw.12161
Identifiersdoi: 10.1111/ajgw.12161
issn: 1322-7130
e-issn: 1755-0238
Appears in Collections:(CIAL) Artículos
Files in This Item:
File Description SizeFormat 
accesoRestringido.pdf15,38 kBAdobe PDFThumbnail
View/Open
Show full item record
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.