Effect of arbuscular mycorrhizal fungus treatments on growth and some nutrient ‎elements uptake of grapevine cv ‘Rasha’ (Vitis vinifera L.) under deficit irrigation ‎stress condition

To determaine th effect of root inoculation of Rasha grape cultivar with three species of arbuscular mycorrhizal fungus(G.versiforme, G. etunicatum, G. intraradices) on shoot growth, macro nutrient elements, chlorophyll content, leaf temperature, RWC, soluble sugars and drought symptoms rate under deficiet irrigation condition (75%, 50% and 35% water requirment) a factorial experiment based on RBCD was conducted in Kahriz Horticultural Research Station, Urmia, Iran. Results showed that increasing deficiet irrigation level, reduced shoot growthand fungus inoculation did not have a posetive effect on this trait in comparision with control. Leaf temperature and dry symptoms on leaves was lowest in vines that inoculated with G. versiforme under 35% deficiet irrigation condition. Leaves of vines with this fungus showed the high RWCin all stress tretments, too. By increasing deficiet irrigation level, soluble sugars were decreased in 55% water requirement and then increased in 35% water requirement. Among macro nutrient elements, the highest amount of P (0.14%) was measured in leaves of vines inoculated by G. versiforme.