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.