Distribution Patterns and Antioxidant Activity of Total Polyphenols and Flavonoids in Leccino Olive Leaves From Longnan
The distribution patterns of total polyphenols and total flavonoids in Leccino olive leaves at 59 different sampling points in the main olive production area in Longnan were studied.The antioxidant activity of olive leaves extracts at different sampling points was measured,and a correlation analysis was conducted on the total polyphenol content and antioxidant capacity.The results showed that the content of total polyphenol ranged from 77.36-322.88 mg/g,with an average value of 126.70 mg/g and a coefficient of variation of 0.31％,and the content of total flavonoid ranged from 54.15 to 226.02 mg/g,with an average value of 78.79 mg/g and a coefficient of variation of 0.29％.The sample points with high content of total polyphenols and flavonoids in olive leaves were mainly distributed in the areas on both sides of the middle reaches of the Bailong River.Olive leaves extract had good antioxidant activity,with average IC50 values of 5.12 and 3.23 g/L for scavenging DPPH·and·ABTS+,respectively.Its antioxidant ability was significantly correlated with total polyphenol content(p＜0.01).
万方数据
维普
