Liu Yuxiu, Huang Shuhua, Jiang Zonghao, Wang Yizhao, Zhang Zhengmao
College of Agronomy, Northwest A&F University, Yangling, China.
College of Horticulture, Northwest A&F University, Yangling, China.
Front Plant Sci. 2021 Oct 18;12:748523. doi: 10.3389/fpls.2021.748523. eCollection 2021.
In Se-deficient populations, Selenium- (Se-) enriched wheat is a source of Se supplementation, and Se content can be improved by agronomic biofortification. Thus, black-grained wheat (BGW) and white-grained wheat (WGW) (as the control) were grown in Se naturally contained soils at different concentrations (11.02, 2.21, 2.02, and 0.20 mg·kg). Then, a field experiment was conducted to assess agronomic performance, the concentration of microelements and heavy metals, and the uptake and distribution of Se in the BGW under the application of Se ore powder. The results showed that the grain yield and grain Se concentration of wheat respectively show a significant increase and decrease from high Se to low Se areas. Higher grain yield and crude protein content were observed in Se-rich areas. The soil application of Se ore powder increased wheat grain yield and its components (biomass, harvest index, grain number, and 1,000 kernels weight). The concentrations of Zn, Fe, Mn, total Se, and organic Se in the grains of wheat were also increased, but Cu concentration was decreased. The concentrations of Pb, As, Hg, and Cr in wheat grains were below the China food regulation limits following the soil application of Se ore powder. Compared with the control, Se ore powder treatment increased the uptake of Se in various parts of wheat plants. More Se accumulation was observed in roots following Se ore powder application, with a smaller amount in grains. In addition, compared with the control, BGW had significantly higher concentrations of Zn, Fe, and Mn and accumulated more Se in grains and shoots and less Se in roots. The results indicate that wheat grown in Se-rich areas increases its grain yield and crude protein content. The soil application of Se ore powder promotes wheat growth and grain yield. Compared with WGW, BGW accumulated more Se in grains and had a higher concentration of organic Se in grains. In conclusion, the application of Se ore powder from Ziyang as Se-enriched fertilizer could be a promising strategy for Se biofortification in the case of wheat, and BGW is the most Se-rich potential genotype.
在缺硒人群中，富硒小麦是补充硒的来源，硒含量可通过农艺生物强化得到提高。因此，黑粒小麦（BGW）和白粒小麦（WGW，作为对照）种植于不同硒浓度（11.02、2.21、2.02和0.20 mg·kg）的天然含硒土壤中。然后，进行田间试验以评估农艺性能、微量元素和重金属浓度以及在施用硒矿粉条件下黑粒小麦中硒的吸收和分布。结果表明，小麦的籽粒产量和籽粒硒浓度分别从高硒区到低硒区呈现显著增加和降低。在富硒地区观察到更高的籽粒产量和粗蛋白含量。土壤施用硒矿粉提高了小麦籽粒产量及其构成因素（生物量、收获指数、粒数和千粒重）。小麦籽粒中锌、铁、锰、总硒和有机硒的浓度也有所增加，但铜浓度降低。土壤施用硒矿粉后，小麦籽粒中铅、砷、汞和铬的浓度低于中国食品规定限值。与对照相比，硒矿粉处理增加了小麦植株各部位对硒的吸收。施用硒矿粉后，根部积累的硒更多，籽粒中积累的硒较少。此外，与对照相比，黑粒小麦中锌、铁和锰的浓度显著更高，籽粒和地上部积累的硒更多，根部积累的硒更少。结果表明，种植在富硒地区的小麦提高了其籽粒产量和粗蛋白含量。土壤施用硒矿粉促进了小麦生长和籽粒产量。与白粒小麦相比，黑粒小麦籽粒中积累的硒更多，籽粒中有机硒浓度更高。总之，施用紫阳硒矿粉作为富硒肥料可能是小麦硒生物强化的一种有前景的策略，黑粒小麦是最具富硒潜力的基因型。
