亚硒酸钠胁迫对小麦种子萌发和硒富集性能的影响

2020-06-21 15:37:21李秀启尹国红贾宝华郝浩浩
安徽农业科学 2020年11期

李秀启 尹国红 贾宝华 郝浩浩

摘要 [目的]探讨小麦富硒性能和萌发特性。[方法]研究不同亚硒酸钠浓度对小麦种子萌发特性及硒富集量的影响,分析不同小麦品种的硒富集能力差异。[结果]高浓度亚硒酸钠胁迫小麦种子的萌发,降低种子的发芽率、发芽势、发芽指数和活力指数;随着Na2SeO3浓度的升高,小麦的含硒量升高。综合考虑发芽率、发芽势、发芽指数、活力指数及有机硒的转化比率等指标,以Na2SeO3浓度200 mg/L處理比较适合富硒麦芽的生产;不同品种小麦对硒的富集转化差异达极显著水平,以蛋白质含量高的品种更有利于硒的吸收和转化。[结论]该研究为硒营养强化小麦芽的应用和生产提供参考。

关键词 亚硒酸钠;小麦;萌发;硒富集

中图分类号 S512.1文献标识码 A文章编号 0517-6611(2020)11-0161-03

Abstract [ Objective]To explore the Se enrichment and germination characteristics of wheat. [Method]Effect of sodium selenite stress on germination characteristics and Se enrichment of wheat seeds were studied,and the difference of Se enrichment ability of different wheat varieties was analyzed.[Result]High concentration of sodium selenite stressed germination of wheat seed,reduced the germination rate, germination potential, germination index and vigor index of seeds;with the increase of sodium selenite concentration, the selenium content of wheat increased;considering the indexes of germination rate, germination potential, germination index, vigor index and organic selenium conversion rate, the results showed that the treatment of sodium selenite concentration 200 mg/L was more suitable for the production of selenium rich malt;different varieties of wheat had a significant effect on the enrichment and transformation ability of selenium. The varieties with high protein content were more conducive to the absorption and transformation of selenium.[Conclusion]This research can provide reference for the application and production of selenium fortified malt.

Key words Sodium Selenite;Wheat;Germination;Se enrichment

硒是一种稀有分散性元素,1817年发现迄今已有200多年的历史。1957年,我国科学家首先提出克山病与硒缺乏有关,现已证实,硒是生物体多种酶和蛋白质的重要组成成分,肯定了硒是人体必需的微量元素之一[1-2]。研究表明,硒与人体健康关系密切,在人体内发挥着抗氧化、增强免疫力等功能[3]。土壤硒缺乏在世界范围内都很普遍,我国约72%的地区处于严重缺硒或低硒状态,这严重影响人类通过食物链摄入硒的量[4-5]。通过人工的方法将无机硒转化为有机硒生产富硒食品是补硒的有效手段之一。植物种子发芽转化法是通过植物种子的发芽将无机硒转化为有机硒,具有操作简单、成本低廉、对环境无污染等优点。……

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