Effects of drought stress on growth and physiological characteristics of Pistacia atlantica seedlings

Drought stress is the main factor affecting on plant growth in dry and sub-dry regions and had the most importance than other abiotic stresses at seedling establishment. So، today''s، the great amounts of biological researches are about drought stresses. In this study، the effect of drought stresses (100، 75، 50 and 25% field capacity) on seedling survival، growth (height، basal diameter، leaf area، root length، root volume and root length/ height) and physiological activities (photosynthesis، transpiration، stomatal conduction، leaf surface temperature and gas exchange) of P. atlantica seedlings were investigated in greenhouse condition. The results showed that drought stress had significant effects on morphological and physiological characteristics of Pistacia atlantica seedlings. So that، drought decreased survival، height growth، basal diameter، leaf surface، photosynthesis، transpiration، stomatal conduction and gas exchange of P. atlantica seedlings. Drought stress hadn’t significant effects on root length، root/height and leaf surface temperature of seedlings.