Total antioxidant capacity and total phenolic and anthocyanin contents in fruit species grown in Northwest Italy

Abstract

Seventeen fruit species grown in Piedmont (Northwest Italy) were analysed for SSC, pH, TA, total antioxidant capacity, and total phenolic and anthocyanin contents to evaluate their nutraceutical value and emphasize the value of the local productions. Major fruit species (pear, apple, apricot) were generally higher in SSC and had moderate acidity but were tendentially lower in phenolics (39.89–93.71mg GAE 100g−1fw) and antioxidant capacity (8.07–11.11mmol Fe2+/kgfw) in comparison with berry fruits. Black mulberry, blackberry, highbush blueberry, currant, raspberry, gooseberry and strawberry confirmed to be excellent antioxidant sources (phenolics 196.98–398.67mg GAE 100g−1fw; FRAP: 11.51–85.97mmol Fe2+/kgfw) while Damask plums showed intermediate properties (phenolics: 175.30–229.62mg GAE 100g−1fw; FRAP: 12.12–17.88mmol Fe2+/kgfw). The highest anthocyanin contents were recorded in black mulberry (341.53mg C3G 100g−1fw), black currant (224.79mg C3G 100g−1fw) and highbush blueberry (222.74mg C3G 100g−1fw). Differences between cultivars of the same species indicated the presence of variability that should be considered in breeding and in the orchards planning.