The possible biotechnological application of a recombinant endopolygalacturonase of Kluyveromyces
marxianus (KMPG) for the aroma enhancement of Albariño wine was studied. The addition of this enzyme
to the must gives rise to a significant increase of the total compounds responsible for the aroma as
opposed to the effect when using a commercial pectic enzyme. This increase also results in a significant
rise of the odoriferous aglycones which are direct determinants of the aroma. Wines made by using the
KMPG enzyme are characterised by a greater richness and diversity with regard to the number of aromatic
compounds present, clearly differing from those obtained with a commercial pectic preparation.
Based on compounds with odour activity values (OAV) > 1, the wines obtained with the enzyme KMPG
are richer in citric, balsamic, spicy and above all floral (violet and rose) aromas than untreated wines
or wines supplemented with a commercial enzyme.