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典型富硒植物中硒形态和生物可给性研究
陆晓奇,王 健,朱元元,刘 颖,袁林喜,高礼先,尹雪斌
1.中国科学技术大学地球与空间科学学院;2.江苏省硒生物工程技术研究中心;3.安徽省全椒县西王镇农技站
摘要:
为了评估生物营养强化技术在富硒农产品生产中的应用效果,本文对苏州硒谷科技有限公司提供的生物营养强化所得富硒植物材料中硒的含量、形态和生物可给性进行了测定。结果表明:生物营养强化技术可有效提高植物中硒的含量,检测样品中硒的含量达到0.91 ~ 110.8 mg/kg。富硒植物中硒的形态主要以硒代氨基酸形式的有机硒为主,其中富硒谷物和大豆中硒主要存在形态为硒代蛋氨酸(SeMet,44.2% ~ 80.4%),富硒西兰花中硒主要存在形态为SeMet(27.8%)、硒代胱氨酸(SeCys2,25.9%)和硒甲基硒代半胱氨酸(MeSeCys,37.1%), 壶瓶碎米荠中硒主要存在形态为SeMet(73%)和SeCys2(23.8%)。富硒植物中硒具有较高的生物可给性,其中富硒小麦和大豆达到90%,富硒玉米和西兰花达到80%,壶瓶碎米荠为50%。生物营养强化所得富硒植物具有硒含量高、有机硒比例大和较好的生物可给性,可作为人体补充硒的重要原料。
关键词:  生物营养强化  富硒植物  硒形态  生物可给性
DOI:10.13758/j.cnki.tr.2018.06.027
分类号:Q946.91;S184
基金项目:山西省重点研发计划重点项目(201703D211001)、山西农谷建设科研专项(SXNGJSKYZX201706)、广西创新驱动发展专项资金项目(桂科AA17202019-2,桂科AA17202026-6,桂科AA17202026-7,桂科AA17202038-1,桂科AA17202044-1,桂科AA17202010,AA17202027-3)
Study on Se Speciation and Bioaccessibility of Typical Se-enriched Plants
LU Xiaoqi1, WANG Jian2, ZHU Yuanyuan2, LIU Ying2, YUAN Linxi2, GAO Lixian3, YIN Xuebin4,5
1.School of Earth and Space Sciences, University of Science and Technology of China;2.Jiangsu Bio-Engineering Research Center for Selenium;3.Xiwang Town Agrotechnical Station;4.School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China;5.2 Key Laboratory of Functional Agriculture, Suzhou Institute for Advanced Study, University of Science and Technology of China
Abstract:
In order to evaluate the effects of bio-fortification on producing Se-enriched agricultural products, the content, speciation and bioaccessibility of selenium in Se-enriched plant materials supplied by Suzhou Setek Co., Ltd. were determined. The results showed that bio-fortification could effectively improve the selenium contents in plants. Selenium content in the tested samples was 0.91–110.8 mg/kg. The main speciation of selenium was selenium amino acid. Selenium in grains and soybeans mainly existed in the form of SeMet (44.2%–80.4%). The main forms of selenium in broccoli were SeMet (27.8%), SeCys2 (25.9%) and MeSeCys (37.1%). The main forms of Se in Cardamine hupingshanesis were SeMet (73%) and SeCys2 (23.8%). Selenium in Se-enriched plants has high bioaccessibility. The bioaccessibilities were 90% for Se-enriched wheat and soybean, 80% for Se-enriched maize and broccoli, and 50% for Cardamine hupingshanesis, respectively. Se-enriched plants produced by bio-fortification have high selenium content, high organic selenium ratio and good bioaccessibility, thus could be used as important materials for human selenium dietary supplement.
Key words:  Bio-fortification  Se-enriched plant  Se speciation  Bioaccessibility

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