Effect of Foliar Application of Selenium on Nutrient Concentration and Yield of Coloredgrain Wheat in China

Abstract

A field experiment was conducted to evaluate the efficiency of foliar application of different concentrations of Se fertilization (37.50, 56.25, 75.00, 93.75, and 112.50 g ha -1 of Se) at the early grain filling stage on nutritional quality of colored-grain wheat. The results showed that Se plays a role in influencing the nutrients concentration of colored-grain wheat. When it was more than 75.00 g ha -1 , the Se concentration in the common wheat was excessive. However, when it was more than 37.50 g ha -1 , the Se concentration in the colored-grain wheat was excessive, indicating that colored-grain wheat was likely to be more sensitive to Se accumulation. Se concentration of colored-grain wheat was significantly increased under the optimal foliar application of Se concentration at 37.5 g ha -1 , decreased starch concentration, without affecting the yield. Particularly, the concentrations of gliadin and glutenin were significantly increased while both albumin and globulin were reduced with the increased Se concentration. Additionally, our research showed that foliar application Se increased the concentration of iron (Fe), zinc (Zn), but decreased the concentration of copper (Cu) and manganese (Mn). More importantly, the intake of Se promoted the production of amino acids and anthocyanins. This indicates the potential roles Se plays on regulating nutrition value in colored-grain wheat.

Selenium Biofortification Modulates Plant Growth, Microelement and Heavy Metal Concentrations, Selenium Uptake, and Accumulation in Black-Grained Wheat

“…The application of Se ore powder increased the absorption of Zn, Mn, and Cu in the grains of maize at certain application doses (Liu et al, 2016a ). Foliar application Se (Na 2 SeO 3 ) increased the concentrations of Fe and Zn in the grains of colored-grain wheat but decreased the concentrations of Cu and Mn (Xia et al, 2019 ). In this study, Zn, Fe, and Mn concentrations in the grains of wheat were first increased and then decreased with an increase of Se application, whereas Cu concentration was decreased ( Table 3 ), indicating that the soil application of Se ore powder has a positive effect on Zn, Fe, and Mn concentrations in the grains of wheat.…”

Selenium Biofortification of Wheat as a Strategy to Improve Human Nutrition

“…Selenium is usually used in amounts (10.00-20.00 g•ha −1 Se) to achieve the goals of biofortification. [20,[66][67][68][69]. Low doses of 5.00 and 10.00 g ha −1 Se were used in the studies, which did not contribute to excessive toxic accumulation of selenium in the grain in comparison with the above studies, in which, despite the higher dose, no toxic effects were found.…”

Methods of Selenium Application Differentially Modulate Plant Growth, Selenium Accumulation and Speciation, Protein, Anthocyanins and Concentrations of Mineral Elements in Purple-Grained Wheat

“…Subplot treatments were the control with no Se application (Se0), soil application of Se (SeS) and foliar spray of Se (SeF). Our previous work with a range of Se rates from 0 to 115 g Se ha −1 showed that foliar spray of 37.5 g Se ha −1 could increase Se concentrations up to 290 μg kg −1 in the grains of wheat cultivars including purple-grained wheat ( Xia et al., 2019 ). The Se concentration of 300 μg kg −1 in wheat grain is considered to be safe for humuan consumption ( Lyons, 2010 ).…”