Sabah G.Sh. Bajlan, Kadum M. Abdullah, Alaa M. Nasser Almulla and Nawras K. Mohammed
Abstract
(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).