Agronomic biofortification with selenium impacts storage proteins in grains of upland rice

Abstract

BACKGROUND Selenium (Se) is an essential element for humans and animals. Rice is one of the most commonly consumed cereals in the world, so the agronomic biofortification of cereals with Se may be a good strategy to increase the levels of daily intake of Se by the population. This study evaluated the agronomic biofortification of rice genotypes with Se and its effects on grain nutritional quality. Five rates of Se (0, 10, 25, 50, and 100 g ha −1) were applied as selenate via the soil to three rice genotypes under field conditions. RESULTS Selenium concentrations in the leaves and polished grains increased linearly in response to Se application rates. A highly significant correlation was observed between the Se rates and the Se concentration in the leaves and grains, indicating high translocation of Se. The application of Se also increased the concentration of albumin, globulin, prolamin, and glutelin in polished grains. CONCLUSION Biofortifying rice genotypes using 25 g Se ha −1 could increase the average daily Se intake from 4.64 to 66 μg day−1. Considering that the recommended daily intake of Se by adults is 55 μg day−1, this agronomic strategy could contribute to alleviating widespread Se malnutrition. © 2019 Society of Chemical Industry

Joint Selenium–Iodine Supply and Arbuscular Mycorrhizal Fungi Inoculation Affect Yield and Quality of Chickpea Seeds and Residual Biomass

“…In addition to its nutritional significance, this phenomenon may turn out beneficial for seed germination efficiency [45], as the antioxidants are known to protect seedlings from biotic and abiotic stresses [45]. Being an analog of S, Se reportedly affects the biosynthesis of amino acids and proteins [46] and, in this respect, an increase in rice storage protein as a result of Se biofortification was recorded by Reis et al [47], consistently with the findings of the present investigation. In previous research [48], phenolics content and total antioxidant activity were enhanced by low doses of I, but there are no reports in the literature about the effect of the joint biofortification with Se and I concurrently with AMF inoculation on antioxidant compounds and activity, as recorded in chickpea seeds in the present study.…”

Selenium biofortification in the 21st century: status and challenges for healthy human nutrition

“…With respect to arable crops, the enrichment with Se mostly leads to higher antioxidant activity of their grains and greater content of nutrients, amino acids, phenols, anthocyanins, sugars, and organo-Se compounds (D’Amato et al 2017 2019 2020 ; Skrypnik et al 2019 ). Also, in upland rice polished grains, Se application induced higher concentration of storage proteins like albumin, globulin, prolamin, and glutelin (Reis et al 2020 ).…”

Selenium in cereals: Insight into species of the element from total amount

“…Reis et al. elevated the Se content in polished rice grains treated by soil fertilization, and estimated that the agronomically biofortified cereals could increase the daily intake of Se to 66 μg/day based on the consumption of rice in Brazilian populations, meeting the requirement of the recommended Se intake value (Reis et al., 2020). The Se content in Se‐enriched cereals has a very wide range, and the Se content in rice grains varies from 0.35 to approximately 30 μg/g in the publications reviewed in Table 2, depending on the cultivar (genotype), fertilized Se forms, and culture and fertilization manners.…”