The effect of ectomycorrhiza and excess Mg on the growth and Ca, Mg, K, P, Fe, Na, Zn, Cu, Mn contents in Pistachio var. Fandoghy

Many investigations have revealed the positive role of ectomycorrhizas on growth and mineral nutrition of plants in recent years. To study the role of ectomycorrhiza on the resistance of Pistachio tree var Fandoghy exposed to excess Mg mycorrhizal plants colonized with Agaricus bisporus were prepared in axenic condition. M & NM plants were treated with different Mg amounts according to a factorial experiment and a CRD design in sterile conical flasks. Growth and mineral contents of shoot and roots and the colonization rates of M plants were measured and compared. The results showed that colonization rate of the roots increased as Mg increased in the nutrient solution. Ca،Mg،P،K،Fe،Na،Mn،Zn،Cu contents in M plants increased but excess Mg caused a decline in Ca،K،Zn and P contents of the plants. The results are discussed in concern with the role of ectomycorrhiza in the nutrition of plants.