【摘要】 为筛选出抗氧化活性较高的甘薯品种、为甘薯的精深加工提供理论依据,比较菜叶型、淀粉型、鲜食型、紫薯等4种类型共18个品种(系)甘薯的叶、藤、皮、肉4个部位的抗氧化活性,并分析其与多酚含量、黄酮类化合物含量的相关性。结果表明:4种类型中以紫薯各部位抗氧化活性、多酚含量和黄酮类化合物含量均较高;4个部位中以叶的各项指标均较高;18个品种(系)中,以绵紫9号、南紫018、泉薯830和川薯228各项指标均较高;抗氧化活性与多酚含量极显著正相关(P<0.01),与黄酮类化合物含量呈显著正相关(P<0.05);甘薯各部位黄酮类化合物组成成份各不相同,但以槲皮苷为主。更多还原

【Abstract】 In order to select the sweetpotato with high antioxidant activity and provide theoretical basis for the refined and deep processing of sweetpotato,the antioxidant activities of leaves,vines,peels and fleshes from 4 types of sweetpotatos(leaf-vegetable sweetpotato,starchy sweetpotato,purple sweetpotato,and fresh-eating sweetpotato),18 varieties or lines in total,were compared. Then,polyphenols content,flavonoids content and their correlation with antioxidant activity were analyzed. The results showed that the antioxidant activity,polyphenols content and flavonoids content in different parts of purple sweetpotato were higher than other types of sweetpotato. Among the 4 parts of sweetpotato,the above-mentioned parameters of leaves were the highest.Among the 18 varieties of sweetpotato,Mianzi 9,Nanzi 018,Quanshu 830 and Chuanshu 228 had the better performance. The antioxidant activity was positively correlated with polyphenols content(P<0.01)and flavonoids content(P <0.05). Flavonoids in different parts of sweetpotato were different,but quercetin was the main component in general.更多还原