Gas exchange and initial growth of Mimosa tenuiflora (Willd.) Poir. plants under salinity conditions

This work aimed to evaluate the physiological behavior and growth of jurema-preta seedlings under salinity conditions. The experiment was conducted at Forestry Nursery Academic Unit Engineering/UFCG, with plants kept in 'Leonard' pots. treatments were distributed a completely randomized design, five levels electrical conductivity (EC) nutrient solution (0.5; 2.0; 3.5; 5.0 6.5 dS m-1) four repetitions. salinization achieved by adding mixture NaCl, CaCl2.2H2O MgCl2.6H2O salts. There progressive decrease plant height, stem diameter, relative rate, water content, stomatal conductance, transpiration photosynthesis rate dry mass production as EC increased. Transpiration less sensitive than conductance seedling photosynthesis. Among parameters, roots most affected salinity.