STIMULATING THE GROWTH OF (ACACIA ARABICA LAM.) SEEDLINGS GROWING UNDER WATER STRESS CONDITIONS CHEMICALLY USING PROLINE AND SALICYLIC ACIDSabah G.Sh. Bajlan, Kadum M. Abdullah, Alaa M. Nasser Almulla and Nawras K. Mohammed
(The experiment was carried out during the period from the cultivation of seeds on 21-2-2017 to 10-4-2018 where the seeds of Acacia arabica Lam. Seeds were planted inside the lath-house at the Faculty of Agriculture- University of Kerbala in Husseiniya district, Karbala, Iraq to examine the effect of proline acid (0, 75, and 150 mg.L-1) and salicylic acid (0, 50 and 100 mg.L-1) on this plant under water stress. The results showed that spraying the seedlings with proline at concentration of 150 mg.L-1 increased the relative moisture content and the total chlorophyll content in leaves with an increase ratio of (7.15 and 30.76%) respectively compared to the control treatment. The treatment of seedling with salicylic at concentration of 100 mg.L-1 of had a significant impact on all studied traits compared to the control treatment. The results also revealed the superiority of the interaction treatment between proline at a concentration of 150 mg.L-1 and salicylic at concentration of 100 mg.L-1 in all studied traits relatively to the control treatment. Foliar spraying of organic acids could be a relief treatment to maintain the growth and development of plants under environmental stresses particularly at the early stages of growing and flowering).