State Key Laboratory of Food Science and Technology, Nanchang University, Jiangxi 330047, China; Jiangxi Academy of Sciences, Jiangxi 330029, China.
Food Chem. 2014 Mar 1;146:531-7. doi: 10.1016/j.foodchem.2013.09.087. Epub 2013 Sep 26.
A study to compare the uptake, translocation, and distribution of selenium (Se) in soybean planted in natural seleniferous soil in Fengcheng city of China was conducted to clarify the relationship between the Se content levels of soybean proteins and their radical scavenging activity. The data showed that the total Se content in different parts of soybean plants varied with the growth periods. The selenoprotein (Se-SPI) content increased remarkably with the increase of Se content in seleniferous soils. The Se-SPI content obtained from the region with the highest Se level was almost 18 times higher than that of the control group, while antioxidant activities were about 4-fold compared to the control, suggesting that Se played a positive role in enhancing the antioxidant activity of Se-SPI. The increase in the Se level also led to changes in amino acids composition, but with nearly no effects on the subunit composition of soybean Se-SPI.
在中国丰城市的天然富硒土壤中种植的大豆中硒（Se）的吸收、转运和分布的比较研究，旨在阐明大豆蛋白的硒含量与其自由基清除活性之间的关系。数据表明，大豆植株不同部位的总硒含量随生长周期而变化。随着富硒土壤中硒含量的增加，硒蛋白（Se-SPI）含量显著增加。从硒含量最高的地区获得的 Se-SPI 含量几乎是对照组的 18 倍，而抗氧化活性则比对照组高约 4 倍，表明 Se 对增强 Se-SPI 的抗氧化活性起到了积极作用。硒水平的增加还导致了氨基酸组成的变化，但对大豆 Se-SPI 的亚基组成几乎没有影响。
