Effect of Saline Stress on the Growth and Physiological Behavior of Young Planting <i>Acacia nilotica</i> in Nursery and After Transplantation

This work consisted of studying the effect of saline constraint represented by different concentrations of NaCl (0, 2, 4, 8 and 11 g / l) at <i>Acacianilotica</i> on certain nursing parameters (germination, growth, biochemical and nutritional) and the survival rate one year after transplanting young clubs in field. The results obtained 14 days after seeding show that the germination rate falls below 40 g / l of NaCl and passes from 90% to 39.2% to 11 g / l of NaCl. After 3 months of stress, it is spring that the growth marked by the height, the diameter of the collar, the number of sheet and the foliar surface decrease as the NaCl concentration increases unlike ray biomass. Salinity has favored the accumulation of soluble, polyphenol, proline and total protein levels in the plant during the experimentation. Regarding the nutritional effect, NaCl negatively affects the nutritional scale of the plants. One year after transplantation, NaCl processed plantations have the best survival rates and the highest was obtained with 4 g / l of NaCl (89.61%). Thus, the submission of young <i>Acacia nilotica</i> plants to a salt strike of 4 g / l NaCl could allow to produce saltwoods for the salinity of the Sahelian zone of Cameroon and this fact contribute to the success of the reforestation campaigns by lower decreases of the mortality rates of transplantation.