沙蓬籽的酚类组成、抗氧化活性及其淀粉体外消化特性  

Phenolic composition,antioxidant capacity and starch digestibility in vitro of sand rice

作　　者：王琦[1] 王安 闫帅帅 张祺祺 王浩鹏 邵红军[1] WANG Qi;WANG An;YAN Shuaishuai;ZHANG Qiqi;WANG Haopeng;SHAO Hongjun(School of Food Engineering and Nutritional Science,Shaanxi Normal University,Shaanxi Engineering Laboratory for Food Green Processing and Security Control,Xi′an 710119,Shaanxi,China)

机构地区：[1]陕西师范大学食品工程与营养科学学院,陕西省绿色食品制造与安全控制实验室,陕西西安710119

出　　处：《陕西师范大学学报（自然科学版）》2020年第5期42-47,共6页Journal of Shaanxi Normal University：Natural Science Edition

基　　金：陕西省农业科技创新与攻关项目(2016NY-174);中国博士后科学基金(2015M580811)。

摘　　要：以小米、黑米和大米3种谷物为参照,研究了沙蓬籽的多酚化学组成、体外抗氧化活性及其淀粉体外消化特性。采用高效液相色谱法(HPLC)从沙蓬籽中鉴定出8种多酚类化合物,其中以原儿茶酸含量最高,达到207.67μg/g干重。沙蓬籽表现出较高的DPPH、ABTS自由基清除活性和铁离子还原能力,且显著高于大米和小米。同时,沙蓬籽中抗性淀粉的含量高达17.54%,其血糖生成指数显著低于大米和黑米。Agriophyllum squarrosum is a kind of wild pioneer psammophyte and the usage of its seed(sand rice)for food has a long history.In this study,the phenolic composition,antioxidant capacities and starch digestibility in vitro of sand rice were investigated and compared with those of millet,black rice and rice.Eight phenolic compounds were identified and quantified in sand rice extracts using high performance liquid chromatography(HPLC)method,and protocatechuic acid was tested as the major compound with a level of 207.67μg/g dry weight.Meanwhile,sand rice showed higher DPPH and ABTS radical scavenging capacities and ferric ion reducing power than those of rice and millet.The content of resistant starch in sand rice was 17.54%,and its glycemic index was significantly lower than those of rice and black rice.Our finding provides guidance for the development and utilization of sand rice as functional products.

关 键 词：沙蓬籽 多酚 抗氧化活性 抗性淀粉 血糖生成指数 

分 类 号：TS201.4[轻工技术与工程—食品科学]