Comparative analysis of bioactive substances content and antioxidant activity of different Actinidia arguta cultivars
Fruits of ten Actinidia arguta cultivars'Kuilü','Fenglü','Jialü','Wanlü','Xinlü','Pinglü','Lubao','Cuiyu','Tianxinbao'and'Longcheng 2'were used as test materials,and their bioactive substances content and antioxidant capacity were determined and compared.The results showed that the vitamin C content(2 023.9 mg/kg)and DPPH·clearance rate(86.00％)of'Kuilü'were significantly higher than those of the other nine Actinidia arguta cultivars.The total flavonoids content(3.85 mg/g),O2·scavenging rate(60.51％)and·OH scavenging rate(83.13％)of'Fenglu'were the highest.The total phenol content(1.88 mg/g),tannin content(0.62 g/L),FRAP value(6.78 mmol/L)and total reducing power(1.63)of'Jialü'are higher than those of the other nine Actinidia arguta cultivars.Overall,'Kuilu','Fenglu'and'Jialu'had higher antioxidant capacity.The results of correlation analysis and multiple regression analysis showed that the total phenolic content of Actinidia arguta fruit was positively correlated with DPPH·scavenging rate,O2·scavenging rate,·OH scavenging rate,FRAP value and total reducing power.The content of vitamin C was positively correlated with the antioxidant activity indexes of DPPH·scavenging rate,·OH scavenging rate,FRAP value and total reducing power.The results indicated that vitamin C and total phenols played an important role in the antioxidant capacity of Actinidia arguta fruit.
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