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投稿时间：2017-02-25
投稿时间：2017-02-25
中文摘要: 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。
Abstract: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.
文章编号：201720002 中图分类号： 文献标志码：
基金项目:国家自然科学基金项目（41161016）
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