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In the present research, two inactivated yeast strains (W13 and BM45) and a commercial yeast cell wall preparation (YCW) already tested for their ability to removal ochratoxin A were used to simulate the wine aging. During the simulated aging, the concentrations of the main 4 anthocyanins decreased in both the control wine and the wines added with yeasts, although at rates depending on the type of yeast and on the nature of anthocyanins. Peonidin-3- O -glucoside decreased by about 20% in the control wine and by ~ 50% in the wines added with yeast strains or the commercial yeast preparation. Malvidin-3- O -glucoside decreased by about 80% in the control wine and in the wine added with YCW and by about 96% in the wines added with W13 and BM45 strains. Cyanidin-3- O -glucoside decreased by 47% in the control wine, by 65-66% in the wines added with W13 and BM45 strains, and by 73% in the wine added with YCW. Delphinidin-3- O -glucoside decreased by 100% already after 21-28 days of aging in all the wines.

Fate of anthocyanins in the presence of inactivated yeasts and yeast cell walls during simulation of wine aging