不同品种猕猴桃果实的理化性质及抗氧化活性

Physicochemical property and antioxidant activities of different kiwifruit cultivars

测定7种猕猴桃(红阳、华优、翠香、徐香、海沃德、秦美和黄金果)的理化特性和抗氧化活性。结果表明:7种猕猴桃果实理化性质存在显著性差异,平均含水量为80%;可溶性固形物质量分数在10.83%~18.94%,以翠香最高;蛋白质含量8.75 mg/g^10.5mg/g,平均含量为9.77 mg/g;V_C含量以华优猕猴桃最高,为1.60 mg/g;叶绿素含量以海沃德最高,为37.20 mg/kg,以黄金果最低,为4.62 mg/kg;总酚含量以秦美最高,为1.69mg/g。抗氧化活性方面,秦美的DPPH自由基清除能力、Fe^(2+)络合能力和Fe^(3+)还原能力均最强,但华优具有最强的对DNA氧化损伤的保护作用。

Physicochemical properties and antioxidant activities in 7 kiwifruit cultivars(Hongyang,Huayou,Cuixiang,Xuxiang,Hayward,Qinmei,Huangjinguo)were determined.The results showed that there was significant difference in physicochemical properties.The average moisture content was 80%.Soluble solids content ranged from 10.83%to 18.94%,and the highest was recorded in Cuixiang.Protein content varied from 8.75mg/g to 10.5mg/g,the average content was 9.77 mg/g.Huayou exhibited the highest content of Vitamin C(1.60 mg/g).Hayward had the highest chlorophyll content(37.2 mg/kg),and the lowest was recorded in Huangjinguo(4.62 mg/kg).Qinmei displayed the highest total phenolics content(1.69mg/g).In terms of antioxidant activity,Qinmei exhibited the strongest Fe 3+reducing power,DPPH radical scavenging capacity and Fe 2+chelating capacity.And Huayou had the best protective effect against DNA oxidative damage.