不同肉色甘薯抗氧化特性的基因型差异及其相关性研究  

Genotypic Difference and Correlation in Antioxidation Activity of Sweet Potatoes with Different Flesh Color

作　　者：唐忠厚[1] 李洪民[1] 马代夫[1] 

机构地区：[1]中国农业科学院甘薯研究所,徐州221121

出　　处：《中国粮油学报》2009年第5期47-52,共6页Journal of the Chinese Cereals and Oils Association

基　　金：国家科技支撑计划(2006BAD01A06-2);公益性行业(农业)科研专项经费(NYHYZX07-012-01C)

摘　　要：通过DPPH法测定12个不同肉色（白色,黄色,橘色和紫色）甘薯品种的抗氧化性AE值（干重）。结果表明：抗氧化活性Ayamurasaki（紫肉）最高（AE=3.333）和栗子香（白肉）最低（AE=0.029）.AE值与维生素C含量弱负相关性（r=-0.162）,与总黄酮、花青素、胡萝卜素、总酚都呈极显著相关性（r分别为0.900、0.925、0.957、0.972,P〈0.01）,其中总酚含量（4.59-64.84 mg GA/g）与AE相关性最好,故总酚含量可以作为评价甘薯品种抗氧化性指标。Antioxidation activity values （AE/dw） of 12 sweet potato genotypes with different flesh color （white, yellow, orange and purple） were measured by 2,2- diphenyl- 1 - picrylhydrazyl （DPPH）. Results show that the antioxidation activity is highest （AE = 3.333） for Ayamurasaki with purple flesh and lowest （AE = 0.029） for Lizixiang with white flesh. AE value is poorly correlative with the VC content of sweet potato（r = 0. 162）, but is significantly correlative with the contents of total anthocyanin, total phenolic, total carotene, and total flavonoi of sweet potato （r = 0.900, 0.925, 0.957, 0.972, respectively, P 〈 0.01 ）, and most correlative with total phenolic content （ content range of 4.59 - 64.84 mg GA/g dw）. Therefore, total phenolic content can serve as a useful indicator for the antioxidaion activity of sweet potato.

关 键 词：甘薯 DPPH 花青素 酚类 黄酮 胡萝卜素 抗氧化活性 

分 类 号：S531[农业科学—作物学]