Selenium in agroecosystems in tropical areas: A focus in Brazil

Guilherme, L. R. G.; Carvalho, Geila Santos; Júnior, Ediu Carlos da Silva; Abreu, Lucimar Santiago de; Souza, Gonçalves de; Marques, Juliane Cutrim

doi:10.1201/b19240-9

Cited by 1 publication

(2 citation statements)

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“…Although soil Se content is still a major concern, especially in weathered soils of tropical and subtropical agroecosystems (Guilherme et al, 2016), the identification of potential plant cultivars to accumulate Se in tissues is important for the success of any biofortification strategy and is also a major step for programs combining genetic and agronomic approaches for producing food with greater nutrient densities. Indeed, better selection of cultivars with a higher capacity to accumulate Se in edible parts (e.g., wheat grains, in this study), combined with Se fertilization, is the most efficiency management strategy to increase the level of Se in the food chain, thus directly promoting, improving, and defending the health and well-being of all species.…”

Section: Gene Expression Involved In Selenium Uptake and Assimilationmentioning

confidence: 99%

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Genotypic Variation and Biofortification with Selenium in Brazilian Wheat Cultivars

Boldrin

Faquin

Clemente³

et al. 2018

J of Env Quality

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Selenium is essential to human and animal health, as it regulates glutathione peroxidase activity. Although not considered essential to plants, it may be beneficial to plant growth and development at low concentrations. This study evaluated the effect of selenate application on Se biofortification, macro‐ and micronutrient content, and the expression of genes involved in Se uptake and assimilation in 12 Brazilian wheat (Triticum aestivum L.) cultivars. This nutrient‐solution experiment was performed in a greenhouse and consisted of a complete 12 × 2 factorial randomized design, with 12 wheat cultivars in the absence or presence of Se in solution (13 μmol), with three replicates. The presence of Se in solution did not affect growth and yield of wheat cultivars. Selenium content and accumulation in the grain varied significantly among the different cultivars. The presence of Se affected macronutrient content more than micronutrient content, and selenate application increased S content in the shoots of eight cultivars and in the grains of five cultivars. Examination of gene expression did not allow identification of responses within the two groups of cultivars—with high or low Se contents—after selenate application. Our findings are relevant to the design of Se biofortification strategies for wheat in tropical and subtropical agroecosystems. Core Ideas Selenate application increased S content in the shoot and grain tissues of wheat cultivars. Supplying Se through the roots enhances Se in wheat tissue, both shoots and grain. Linking genetic–agronomic approaches is key for biofortifying Brazilian wheat cultivars with Se.

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Section: Gene Expression Involved In Selenium Uptake and Assimilationmentioning

confidence: 99%

“…The low Se availability in most soils, especially in weathered soils (Guilherme et al, 2016), is a factor that justifies the use of biofortification. Crops that are grown in soils with low availability of this element tend to accumulate it at low concentrations.…”

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confidence: 99%