High anthocyanin concentration in fruit improved wine phenolic parameters in wine including higher colour density, less browning, more polymeric pigments and higher tannin concentration in wine regardless of the amount of tannin measured in the grapes.
This study clearly demonstrates a strong relationship between tannin and anthocyanin for determining the amount of tannin that is extracted into wine in Shiraz grapes grown in southeast Australia. The ratio of tannin to anthocyanin measured in fruit is not
directly transferred from grape into wine, however anthocyanin concentration might be a key component for increasing tannin solubility and extraction into wine. This study highlights the gaps in our understanding of the ratio of tannin to anthocyanin in the
grape to wine continuum.