The high concentration of tannin in wines made from fruit with a high concentration of anthocyanin suggests that anthocyanin might be a key component for increasing tannin solubility and extraction into wine. While this study was only conducted in one season in Shiraz grown in southeast Australia, the results suggest the potential for using viticultural management practices aimed at increasing anthocyanin levels in fruit. It is conceivable that increasing anthocyanin levels in fruit, may help to increase the amount of tannin extracted into wine in regions where wine tannin concentration is consistently low. The wines made in this study were low in tannin (25–240 mg/L) compared to the range of tannin that has been measured in wine in other regions (30–1800 mg/L) (Harbertson et al., 2008), which meant that the difference in tannin extracted into high and low anthocyanin wines was substantial, however this may not be the case in regions where
it is not difficult to get high levels of tannin in wine.