Document Detail

Effect of beta-glycosidase activity of Oenococcus oeni on the glycosylated flavor precursors of Tannat wine during malolactic fermentation.
MedLine Citation:
PMID:  11929295     Owner:  NLM     Status:  MEDLINE    
Under traditional wine-making conditions, this work examines the beta-glycosidic activity of Oenococcus oeni on glycosylated aroma compounds of Tannat wines during malolactic fermentation (MLF) by comparing the changes on selected aglycones liberated. MLF diminished the content of all the glycosylated compounds. The level of the free aroma components was slightly modified by the action of the malolactic fermentation so that the cleavage of the glycosidic linkage by the beta-glycosidic activity of O. oeni did not appear to increase significatively the aglycone contents. The consequences of further chemical rearrangements of the algycones under wine conditions were explored using synthesized glycoconjugates on synthetic medium. Bacteria could also be responsible for the cleavage of aroma glycosylated compounds, being the aglycone adsorbed on polysaccharides or peptidoglycans and was released into the external medium. This hypothesis was studied through the evaluation of a stable arrangement of aroma compounds with polysaccharides produced by lactic acid bacteria. A possible retaining of free-made aroma compounds into the whole cells of O. oeni was also investigated through cell culture analysis. Through the results obtained, we assume stable linkage of aroma compounds with bacterial polysaccharides.
Eduardo Boido; Adriana Lloret; Karina Medina; Francisco Carrau; Eduardo Dellacassa
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of agricultural and food chemistry     Volume:  50     ISSN:  0021-8561     ISO Abbreviation:  J. Agric. Food Chem.     Publication Date:  2002 Apr 
Date Detail:
Created Date:  2002-04-03     Completed Date:  2002-05-29     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0374755     Medline TA:  J Agric Food Chem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2344-9     Citation Subset:  IM    
Seccion Enologia, Facultad de Quimica, Universidad de la Republica, Gral. Flores 2124, 11800-Montevideo, Uruguay.
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MeSH Terms
Glycoside Hydrolases / metabolism*
Gram-Positive Cocci / enzymology*
Lactic Acid / metabolism*
Leuconostoc / enzymology
Malates / metabolism*
Odors / analysis
Polysaccharides, Bacterial / pharmacology
Wine* / analysis
Reg. No./Substance:
0/Malates; 0/Polysaccharides, Bacterial; 50-21-5/Lactic Acid; 6915-15-7/malic acid; EC 3.2.1.-/Glycoside Hydrolases

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