Physiological efficiency and performance of peanuts under salt stress and inoculated with Bradyrhizobium

In this work, we sought to know the effects of water salinity on peanut plants and whether inoculation with a mixture of Bradyirhizobium would be effective in reducing the effects and improving performance. The experimental design was completely randomized, with a 4 x 2 factorial arrangement, four levels of water salinity (0,5 dS m(-1) - control), 1,5 dS m(-1), 3 dS m(-1), 4,5 dS m(-1)) and plants inoculated and not inoculated with Bradyrhizobium sp., totaling 8 treatments and 4 repetitions. For the gas exchange evaluations made at 55 days after sowing, two variables were used: instantaneous efficiency of carboxylation and photochemical efficiency of photosynthesis, of growth: plant height, stem diameter, number of leaves and leaf area, all made at 65 days after sowing, with the aid of a millimeter ruler and a caliper. In relation to biomass: area dry matter, root dry matter and total dry matter, at 70 days after sowing. Fixing bacteria helped in the production of molecules that helped and fortified the physiological apparatus and gave an increase in growth variables. The mix of bacteria (bacterial) were efficient to reduce the deleterious effects accumulation by the biomass, with that the best plants had a creation and not accumulation of biomass.