title: Influence of yeast strain on ochratoxin A content during fermentation of white and red must.
abstract: The aim of this work was to examine whether the yeast strains, responsible for alcoholic fermentation, have an influence on the concentration of ochratoxin A (OTA) in wine. Before the fermentation, OTA was added to musts up to a concentration of about 2 microg/l. OTA content was determined in white and red wines resulting from respective musts and in methanolic extract of the yeast lees (MEL). Data showed a significant reduction of OTA at the end of alcoholic fermentation. However, depending on the yeast strain involved in the fermentation, there was a difference in the content of OTA in the wines. The percentage of OTA removal during the fermentation was between 46.83% and 52.16% in white wine and between 53.21% and 70.13% in red wine. The absence of degradation products suggested an adsorption mechanism. OTA concentration in MEL resulting from red must fermentation was higher than in white. A significant amount of OTA was not recovered either from wine or from MEL.
authors.affiliation: C.R.A. Istituto Sperimentale per l'Enologia, Sede Operativa di Velletri Via Cantina Sperimentale 1, 00049 Velletri (Roma), Italy. mmt@panservice.it
authors.forename: Francesca
authors.initials: F
authors.lastname: Cecchini
authors.forename: Massimo
authors.initials: M
authors.lastname: Morassut
authors.forename: Emilia
authors.initials: E
authors.lastname: Garcia Moruno
authors.forename: Rocco
authors.initials: R
authors.lastname: Di Stefano
mesh_terms: D000327:Adsorption; D002273:Carcinogens / Q000032:analysis*; D003257:Consumer Product Safety; D005285:Fermentation; D005504:Food Analysis; D005506:Food Contamination / Q000032:analysis*; D006801:Humans; D008452:Maximum Allowable Concentration; D009793:Ochratoxins / Q000032:analysis* / Q000096:biosynthesis; D014920:Wine / Q000032:analysis* / Q000382:microbiology; D015003:Yeasts / Q000378:metabolism*
chemical_list: D002273:Carcinogens; D009793:Ochratoxins; C025589:ochratoxin A