枣和酸枣不同器官黄酮含量比较及抗氧化能力分析

为进一步提高枣资源综合开发利用率,以酸枣、过渡(中间)类型和栽培枣共3类种质5个品种为试材,对不同品种不同器官(果实、果皮、果肉、叶片、花、种仁)总黄酮含量及果实黄酮提取液清除羟基自由基(·OH)的能力进行分析测定。结果表明:3类种质的5个品种脆熟期果实的总黄酮含量(以鲜重计)为0.89～3.55 mg/g,平均值为1.94 mg/g;果皮总黄酮含量为4.13～8.21 mg/g,平均值为5.73 mg/g;果肉总黄酮含量为0.17～1.07 mg/g,平均值为0.66 mg/g;花总黄酮含量为3.47～6.90 mg/g,平均值为5.50 mg/g;成熟叶片总黄酮含量为7.01～9.02 mg/g,平均值为7.98 mg/g;种仁总黄酮含量为6.48～14.39 mg/g,平均值为11.43 mg/g。5个品种各器官总黄酮含量的大小顺序为:种仁>叶片>果皮>花>果实>果肉;果实、果肉和叶片中总黄酮含量都是酸枣>中间类型>栽培枣;3类种质脆熟期果实黄酮提取液与·OH清除能力均呈显著正相关。

Comparison of flavonoid contents and antioxidant capacities in different organs of Chinese jujube and wild jujube

To improve the utilization of jujube resources,taking 5 varieties of 3 types of wild jujube,intermediate type and Chinese jujube as materials,the contents of flavonoid in different organs(fruits,peel,pulp,leaf,flower,kernel)and the ability to remove·OH were analyzed.The results showed that the total flavonoid contents in fruits of 5 varieties was0.89~3.55 mg/g FW,and the mean value was 1.94 mg/g FW;the total flavonoid contents of peel was 4.13~8.21 mg/g FW,with an average of 5.73 mg/g FW;the total falvonoid contents of pulp was 0.17~1.07 mg/g FW,with an average of 0.66 mg/g FW;the total flavonoid contents in flowers was 3.47~6.90 mg/g FW,with an average of 5.50 mg/g FW;the total flavonoid content in leaves was 7.01~9.02 mg/g FW,the mean value was 7.98 mg/g FW;the total flavonoid contents in kernals was6.48~14.39 mg/g FW,with an average of 11.43 mg/g FW.The order of flavonoid contents in different organs was:kernel>leaf>peel>flower>fruit>pulp.The order of flavonoid contens in fruits,pulp and leaf was:Wild jujube>intermediate type>Chinese jujube.There was a significant positive correlation between flavonoid content and·OH removal ability in fruits.