Selenium increases photosynthetic capacity, daidzein biosynthesis, nodulation and yield of peanuts plants (Arachis hypogaea L.)

Author(s)

Cunha, Matheus Luis Oliveira ; de Oliveira, Lara Caroline Alves ; Silva, Vinicius Martins ; Montanha, Gabriel Sgarbiero ; Reis, Andre Rodrigues dos

• Document type: Journal article
• Source: Plant Physiology and Biochemistry; v. 190, p. 9-pg., 2022-11-01.

Abstract

This study aimed to investigate the roles of selenium (Se) application on the profile of photosynthetic pigments, oxidant metabolism, flavonoids biosynthesis, nodulation, and its relation to agronomic traits of peanut plants. Two independent experiments were carried out: one conducted in soil and the other in a nutrient solution. When the plants reached the V2 growth stage, five Se doses (0, 7.5, 15, 30, and 45 mu g kg -1) and four Se concentrations (0, 5, 10, and 15 mu mol L-1) were supplied as sodium selenate. The concentration of photosynthetic pigments, activity of antioxidant enzymes and the concentration of total sugars in peanut leaves increased in response to Se fertilization. In addition, Se improves nitrogen assimilation efficiency by increasing nitrate reductase activity which results in a higher concentration of ureides, amino acids and proteins. Se increases the synthesis of daidzein and genistein in the root, resulting in a greater number of nodules and concentration and transport of ureides to the leaves. Se-treated plants showed greater growth, biomass accumulation in shoots and roots, yield and Se concentration in leaves and grains. Our results contribute to food security and also to increase knowledge about the effects of Se on physiology, biochemistry and biological nitrogen fixation in legume plants. (AU)

• FAPESP's process: 20/10053-8 - Physiological and biochemical role of selenium on flavonoids biosynthesis and biological nitrogen fixation of legume plants
• Grantee: Matheus Luis Oliveira Cunha
• Support Opportunities: Scholarships in Brazil - Master