Classification of Pistacia atlantica and P. khinjuk sites in Ilam based on environmental factors and arbuscular mycorrhizal fungi

Arbuscular mycorrhiza fungi have beneficial symbiosis with plants and help them to absorb nutrient and water، especially in regions with these limitations. For studying the effects of environmental factors on mycorrhizal fungi associated with Pistacia atlantica and P. khinjuk in Ilam، soil and physiographic factors was sampled in their habitats and N، P، K، Ca، Mg، Na، pH، Ec، apparent specific weight of soil، Clay، Silt and Sand were analyzed. Moreover fungi were identified and frequency of spore determined. Result showed that Glomus genus and G. fasiculatum had the most number of spores in this region. Mishkhas، Eyvan and Nakhchir habitat in north had the most and Tangevar and Badre in south had the least spore abundance. Result also showed that number of spores have positive correlation with elevation، tree cover، tree diameter، litter and organic matter and negative with P، Mg and apparent specific weight of soil. Moreover result showed that spores were abundance in spring.