富硒、非富硒大米有机硒的组成及硒的可利用度分析  

Composition of the Organic Selenium (Se) and the Accessible Se in Se-enriched and Non Se-enriched Rice

作　　者：龚如雨 钟松臻 张宝军[1,2] 程祥磊[1] 

机构地区：[1]南昌大学公共卫生学院,江西南昌330006 [2]中国科学院地理科学与资源研究所,北京100101

出　　处：《食品研究与开发》2017年第20期11-15,共5页Food Research and Development

基　　金：国家自然科学基金项目(41161016)

摘　　要：为探究人体对大米硒营养的利用状况,比较富硒、非富硒大米之间有机硒、碱溶谷蛋白、硒蛋氨酸等的组成差异,并运用体外模拟法对大米硒的可利用度进行研究。结果表明:有机硒是大米中硒的主要形态,富硒大米有机硒的比例[(77.6±11.3)%,n=7]高于非富硒大米[(64.1±7.5)%,n=8],(P<0.05)。大米碱溶谷蛋白的胃肠模拟消化液中仅有硒蛋氨酸被检出,硒蛋氨酸占碱溶谷蛋白硒的比例为33.1%~97.6%。虽然人体对富硒大米硒的可利用度[(62.6±7.8)%,n=7]高于非富硒大米[(46.1±10.3)%,n=8](P<0.05),但是,富硒大米谷蛋白中硒蛋氨酸的比例[(45.5±9.0)%,n=7]却明显低于非富硒大米[(81.2±12.3)%,n=8](P<0.05)。可见,富硒水稻中硒蛋氨酸的转化及对人体健康的作用尚需进一步研究。To explore the utilization of Se nutrition in rice by human body, the differences of organic Se, glutelin extracted by alkali and fraction of selenomethionine （SeMet） in Se-enriched rice or non Se-enriched rice were compared, and accessibility of Se in rice samples were analyzed using the in-vitro simulation method. The results showed that the organic Se was the dominated form, and the ratio of organic Se in Se-enriched rice [（77.6±11.3） %, n=7] was higher than that in non Se-enriched rice [（64.1±7.5） %, n = 8] （P 〈 0.05）. The selenomethionine （SeMet）, which accounted for 33.1%-97.6 %, was the only species detected in gastrointestinal simulation digestive solution of glutelin. Even though the accessibility of Se in Se-enriched rice [（62.6±7.8） %, n = 7] was higher than that in non Se-enriched rice [（46.1±10.3） %, n = 8] （P 〈 0.05）, the ratio of SeMet in glutelin of Se-enriched rice [（45.5±9.0 %, n = 7）] was significantly lower than that in non Se-enriched rice [（81.2±12.3） %, n = 8] （P〈 0.05）. Therefore, further studies should be conducted on the transformation of SeMet in Se-enriched rice and its effects on human health in future.

关 键 词：体外模拟 大米有机硒 硒蛋氨酸 可利用度 

分 类 号：TS210.1[轻工技术与工程—粮食、油脂及植物蛋白工程]