Chorisia glaziovii O. Kuntze, a native species of Northeast Brazil belonging to the Bombacaceae, is widely used in folk medicines, the recuperation of degraded areas and the upholstery industry. The objective of this study was to evaluate the effects of saline stress and temperature on the germination and vigor of C. glaziovii seeds. Saline solutions were prepared using sodium chloride (NaCl) as the solute, at concentrations of 0,0 (control); 1.5; 3.0; 4.5 and 6.0 dS.m-1, diluted in distilled and deionized water. The seeds were distributed on the substrate to germinate at a constant 25 °C, 30 °C, 35 °C and an alternating temperature of 20-30 °C. The experimental design was randomized, with treatments distributed in a 5 x 4 factorial (five salinity levels and four temperatures), with four replications of 25 seeds. The percentage germination, first count and germination speed index and seedling lengths (root and shoot) were evaluated. Increasing salt concentration in the substrate reduced the germination and vigor of C. glaziovii seeds, especially at temperatures of 30 °C and 35 °C. At temperatures of 25 °C and 20-30 °C, the seed germination and vigor were less affected by water stress. Saline stress caused by NaCl up to the potential of 4.5 dS.m-1 did not affect the germination of C. glaziovii, which has developed a high tolerance to salinity.
barriguda; forest seeds; salinity; seed analysis
