Key Laboratory of Potato Biology and Biotechnology, Ministry of Agriculture, Wuhan, Hubei 430070, China; Microelement Research Center, Huazhong Agricultural University, Wuhan 430070, China.
Jianshi Soil and Fertilizer Station of Hubei Province, Jianshi 445300, Hubei, China.
Food Chem. 2019 Jul 15;286:550-556. doi: 10.1016/j.foodchem.2019.01.185. Epub 2019 Feb 7.
Since the potato is a new staple food in China, the production of selenium (Se)-enriched potato may be an effective approach for Se supplementation in Se-deficient populations. Herein, we biofortified potato via the foliar application of sodium selenate and sodium selenite at three growth stages and investigated the resulting Se contents and speciation. Results showed that selenate was more efficient than selenite in improving total Se, and the highest tuber Se concentration was obtained at the tuber bulking stage. However, the accumulation of inorganic Se was higher in tubers treated with selenate (31.9% of total Se) compared with the selenite treatment (1.5%). The major Se species in tubers treated with both selenite and selenate was selenomethionine, which accounted for ∼80.0% and ∼50.0% of total Se, respectively. The findings suggest that the foliar application of selenite during the tuber bulking stage is appropriate for the production of Se-rich potatoes.
由于马铃薯是中国的一种新主食，因此生产富硒马铃薯可能是硒缺乏人群补充硒的有效方法。在此，我们通过在三个生长阶段叶面喷施亚硒酸钠和硒酸钠来生物强化马铃薯，并研究了由此产生的硒含量和形态。结果表明，硒酸盐比亚硒酸盐更有效地提高总硒含量，在块茎膨大区获得了最高的块茎硒浓度。然而，与亚硒酸盐处理相比，硒酸盐处理的块茎中无机硒的积累更高（占总硒的 31.9%）。亚硒酸盐和硒酸盐处理的块茎中主要的硒形态均为硒代蛋氨酸，分别占总硒的约 80.0%和 50.0%。研究结果表明，在块茎膨大区叶面喷施亚硒酸盐适合生产富硒马铃薯。
