The transference of proanthocyanidins from grapes to wine is quite low. This could be due, among other
causes, to proanthocyanidins being bound to grape cell wall polysaccharides, which are present in high
concentrations in the must. Therefore, the effective extraction of proanthocyanidins from grapes will
depend on the ability to disrupt these associations, and, in this respect, enzymes that degrade these
polysaccharides could play an important role. The main objective of this work was to test the behavior
of proanthocyanidin–cell wall interactions when commercial maceration enzymes are present in the
solution. The results showed that cell wall polysaccharides adsorbed a high amount of proanthocyanidins
and only a limited quantity of proanthocyanidins could be desorbed from the cell walls after washing
with a model solution. The presence of enzymes in the solution reduced the proanthocyanidin–cell wall
interaction, probably through the elimination of pectins from the cell wall network.
The transference of proanthocyanidins from grapes to wine is quite low. This could be due, among othercauses, to proanthocyanidins being bound to grape cell wall polysaccharides, which are present in highconcentrations in the must. Therefore, the effective extraction of proanthocyanidins from grapes willdepend on the ability to disrupt these associations, and, in this respect, enzymes that degrade thesepolysaccharides could play an important role. The main objective of this work was to test the behaviorof proanthocyanidin–cell wall interactions when commercial maceration enzymes are present in thesolution. The results showed that cell wall polysaccharides adsorbed a high amount of proanthocyanidinsand only a limited quantity of proanthocyanidins could be desorbed from the cell walls after washingwith a model solution. The presence of enzymes in the solution reduced the proanthocyanidin–cell wallinteraction, probably through the elimination of pectins from the cell wall network.
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