Journal
FOOD CHEMISTRY
Volume 141, Issue 3, Pages 2385-2393Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2013.05.095
Keywords
Oryza sativa; Selenium-enriched rice; Selenium; Forliar application; Antioxidant assay
Funding
- CUHK Institute of Plant Molecular Biology and Agricultural Biotechnology Research Grant [1901037]
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To fulfill the natural human needs of selenium, selenium biofortification has been carried out in rice (Oryza sativa) in recent years. Despite some improvements have been made, the increase of selenium content in rice was still limited and a large amount of fertilisers are often required, which may cause environmental pullution. In this study, we further improved the selenium biofortification of rice by using less selenium fertilisers (10.5 g selenium/hectare) whereas, largely increasing selenium content in rice grains (up to 51 times vs. control). Furthermore, selenium speciation analysis, in vitro gastrointestinal digestion and antioxidant assays were performed to evaluate the selenium bioaccessibility and bioavailability in selenium-enriched rice grains. The major selenium species found were readily absorbable selenomethionine. Meanwhile, the selenium-enriched rice grains have significantly higher antioxidant bioactivities. In conclusion, this selenium-enriched rice has enormous potential for selenium supplementation in humans. (C) 2013 Elsevier Ltd. All rights reserved.
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