There are several possible explanations: the adsorption of anthocyanins to the cellwalls of the
used yeast strain (Morata, Gomez-Cordoves, Colomo, & Suarez,2005) and condensation reactions with acetaldehyde
(Bosso & Guaita, 2008).
Perhaps the Saccharomyces strains involved in the 2008 spontaneous fermentations had a greater tendency to adsorb
these molecules than the strain used in the inoculated processes