This paper contributes to the knowledge of the effects of pectic
enzymes, namely endopolygalacturonases, on the final aroma of
wine. The endopolygalacturonase of K. marxianus has been shown
to be a suitable enzyme to carry out its action under the condition
of must/wines of the Albariño variety. When compared to the effect
of a commercial pectic preparation, the addition of this enzyme
to the must can significantly increase both the
concentration of glycoconjugate precursors as well as the free aglycones
responsible for the aromas. Furthermore, the use of the
KMPG enzyme results in richer and more diverse wines based on
the various compounds responsible for the different aromas extracted
as opposed to the wines obtained with the tested commercial
preparation. Among the compounds that significantly increase
their concentration with the use of the new enzyme, the five whose
concentration is above the perception threshold contribute to the
Albariño wine character and are of great interest in young wines
in general. The enzyme KMPG carried out this activity not only
without adversely affecting other fermentation parameters analysed
but, on the contrary, favoured the fermentative activity of
yeast and allowed fermentation in a shorter time.