oles of selenium in mineral plant nutrition: ROS scavenging responses against abiotic stresse

Autor(es)

Dantas Bereta Lanza, Maria Gabriela ^[1] ; dos Reis, Andre Rodrigues ^[2]

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista Julio de Mesquita Filho UN, Via Acesso Prof Paulo Donato Castellane S-N, BR-14884900 Jaboticabal, SP - Brazil

^[2] Univ Estadual Paulista Julio de Mesquita Filho UN, Rua Domingos da Costa Lopes 780, BR-17602496 Tupa, SP - Brazil

• Tipo de documento: Artigo de Revisão
• Fonte: Plant Physiology and Biochemistry; v. 164, p. 27-43, JUL 2021.
• Citações Web of Science: 6

Resumo

Agronomic biofortification of crops with selenium (Se) is an important strategy to minimize hidden hunger and increase nutrient intake in poor populations. Selenium is an element that has several physiological and biochemical characteristics, such as the mitigation of different types of abiotic stress. Selenoproteins act as powerful antioxidants in plant metabolism through the glutathione peroxidase (GSH) pathway, and provide an increased activity for enzymatic (SOD, CAT, and APX) and non-enzymatic (ascorbic acid, flavonoids, and tocopherols) compounds that act in reactive oxygen species (ROS) scavenging system and cell detoxification. Selenium helps to inhibit the damage caused by climate changes such as drought, salinity, heavy metals, and extreme temperature. Also, Se regulates antenna complex of photosynthesis, protecting chlorophylls by raising photosynthetic pigments. However, Se concentrations in soils vary widely in the earth's crust. Soil Se availability regulates the uptake, transport, accumulation, and speciation in plants. Foliar Se application at the concentration 50 g ha(-1) applied as sodium selenate increases the antioxidant, photosynthetic metabolism, and yield of several crops. Foliar Se application is a strategy to minimize soil adsorption and root accumulation. However, the limit between the beneficial and toxic effects of Se requires research to establish an optimal dose for each plant species under different edaphoclimatic conditions. In this review, we present the compilation of several studies on agronomic biofortification of plants with Se to ensure food production and food security to mitigate hidden hunger and improve the health of the population. (AU)

• Processo FAPESP: 19/19114-2 - Análise da cinética de absorção e localização de selênio em genótipos de feijão-caupi pela técnica de u-XRF aliada as respostas fisiológicas e bioquímicas
• Beneficiário: Maria Gabriela Dantas Bereta Lanza
• Modalidade de apoio: Bolsas no Brasil - Mestrado