ارزیابی صفات مورفولوژیکی، فیزیولوژیکی و فعالیت‌های بیوشیمیایی ارقام لوبیا تحت سطوح تنش خشکی

Study of biochemical and physiological response to relevant deficit water can be lead to Strategies main in stress tolerance and also selected drought stress tolerance bean cultivars. Thus, the effects of drought stress level were investigated on Growth characteristics, proline concentrations, antioxidant enzyme activity, Relative permeability of the membrane (EL%), relative water content (RWC%), were used pot experiment, using a factorial experiment based on a randomized complete block design with three replications at university of Tehran. Experimental treatments were included four bean cultivars (Khomain, Naz, Goli) and drought stress level (100%, 70% and 40% FC). Drought stress caused to significant decrease Growth characteristics, RWC while it caused to increase proline content, EL%, Ascorbat peroxidase enzyme (APX) and Hydrogen peroxidase (H2o2). Cultivar showed different response to drought stress; however Khomain indicated low decrease on condition stress. Drought stress caused to increase APX activity and proline in all cultivars. Goli and Naz had highest EL% and sever loss in RWC. High levels of antioxidant activities in tolerant cultivar and the low production rate of H2o2 it seemed that high performance for the removal reactive oxygen spices (ROS) and consequently will be high efficiency.