Selenium application influenced selenium biofortification and physiological traits in water-deficit common bean plants

• DOI: 10.1071/cp20519
• Publication Date: 2021-07-17T07:23:16Z
• Authors: Ruby Antonieta Ve...; Cynthia de Oliveira; Josimar Lessa; Lissa Vasconcello...; Evaristo Mauro de...; Luiz Roberto Guim...; Guilherme Lopes
• Keywords: Biofortification; APX; Stomatal Conductance; Water Use Efficiency; Plant Physiology; Drought Tolerance

Agronomic biofortification with selenium (Se) maybe employed to improve the nutritional value of food crops while increasing plant’s tolerance water deficit conditions. Although not essential for plants, Se may increase plant stress by boosting plants’ defence system activity. This study aimed enrich common bean grains and alleviate effects on applying plants growing under greenhouse. Selenium was applied soil at 0, 0.25, 0.5, 1.0, 2.0 mg kg–1, irrigated water-deficit Antioxidant enzyme activities (SOD, CAT, APX), H2O2 content, gas exchange, SPAD index were assessed in leaves, nutrient concentrations determined grains. Results showed that decreased photosynthetic rate, stomatal conductance, transpiration increased use efficiency. did influence leaves from pod formation maturity stage but improved decreasing content. Increasing rates concentration leaves. At lower rates, mainly 0.25 deficit, SOD, APX reached their maximum values, content minimum without reducing biomass production nutrients accumulation. The highest rate (2 kg–1) detrimental, since it deficit. Conclusively, addition enriched positive responses against when rates.