富硒平菇和壶瓶碎米荠中含硒化合物的研究

Study on Selenium-Containing Compounds in Selenium-Enriched Oyster Mushroom and Cardamine hupingshanensis

硒具有多种生理功能,是人体必不可少的微量元素之一。人体不能合成硒,必须从食物中摄取。当前,有机硒因其安全性和高效性已经取代无机硒并成为主流的补硒选择。本文分析了市场上常见的两种富硒农产品中有机硒的含量,并初步研究了其含硒有机化合物的类别及硒代氨基酸的组成。结果表明,富硒壶瓶碎米荠和富硒平菇的有机硒含量分别为(1 607.81±24.66)mg·kg^(-1)和(240.14±8.96)mg·kg^(-1),有机硒占比分别为76.36%±7.81%和99.93%±0.02%。相较于富硒壶瓶碎米荠,富硒平菇含有更多硒多糖和硒蛋白。两个试样均含有丰富的硒代氨基酸,富硒平菇和富硒壶瓶碎米荠的主要硒代氨基酸分别为硒代蛋氨酸和硒代胱氨酸。

Selenium has many physiological functions and is one of the essential trace elements in human body.Selenium cannot be synthesized by the body and must be taken from food.At present,organic selenium has replaced inorganic selenium and become the mainstream selenium supplement choice because of its safety and high efficiency.In this paper,the content of organic selenium in two selenium-rich agricultural products in the market was analyzed,and the category of organic compounds containing selenium and the composition of seleno-amino acids were preliminarily studied.The results showed that the organic selenium content of Cardamine hupingshanensis and selenium-enriched oyster mushroom were(1607.81±24.66)mg·kg^(-1) and(240.14±8.96)mg·kg^(-1),and the proportion of organic selenium was 76.36%±7.81%and 99.93%±0.02%,respectively.The selenium-enriched oyster mushroom contains more selenium polysaccharide and selenium protein than the Cardamine hupingshanensis.The two samples were rich in seleno-amino acids.Selenomethionine and selenocysteine were the main seleno-amino acids of selenium-enriched oyster mushroom and Cardamine hupingshanensis,respectively.