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