School of Public Health, Nanchang University, Nanchang 330006, China; Jiangxi Province Key Laboratory of Preventive Medicine, Nanchang 330006, China.
School of Public Health, Nanchang University, Nanchang 330006, China; Jiangxi Province Key Laboratory of Preventive Medicine, Nanchang 330006, China; Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China.
Food Chem. 2018 Oct 30;264:443-448. doi: 10.1016/j.foodchem.2018.05.066. Epub 2018 May 15.
The accumulation of organic selenium (Se) in grains is helpful in understanding its bioaccessibility in various Se-enriched rice cultivars after soil selenite treatments. In the present study conducted with two rice cultivars, the organic Se as well as the glutelin-derived Se and the selenomethionine (SeMet) percentage in grains increased with soil Se levels. The available Se that was detected in the forms of SeMet (∼40%) and selenite (∼12%) accounted for more than 50% of the total Se in grains, and no significant differences were observed between the two rice cultivars (P > 0.05). Simulated gastrointestinal digestion showed that the digested grain SeMet increased with the soil Se treatment levels, whereas there were minimal changes in the percentages of selenite in the grain. Furthermore, approximately half of the available SeMet was derived from the grain glutelin. These results suggest that the non-glutelin-derived Se in rice should be further studied.
谷物中有机硒（Se）的积累有助于了解土壤亚硒酸盐处理后各种富硒水稻品种中硒的生物可利用性。在本研究中，使用两种水稻品种进行实验，发现随着土壤硒水平的增加，谷物中的有机硒以及谷蛋白衍生的硒和硒代蛋氨酸（SeMet）的百分比增加。可检测到的以 SeMet（约 40%）和亚硒酸盐（约 12%）形式存在的有效硒占谷物总硒的比例超过 50%，两种水稻品种之间没有观察到显著差异（P>0.05）。模拟胃肠道消化表明，随着土壤硒处理水平的增加，可消化谷物中的 SeMet 增加，而谷物中亚硒酸盐的百分比变化很小。此外，大约一半的可用 SeMet 来自于谷物谷蛋白。这些结果表明，水稻中非谷蛋白衍生的硒应该进一步研究。
