Effect of two arbuscular mycorrhizal fungi on growth and nutrient uptake in different genotypes of Mentha spicata L

In this experiment، the effect of the arbuscular mycorrhizal fungi (AMF) Glomus mosseae and G. etunicatum on root colonization، plant growth and nutrient uptake، chlorophyll content (a، b، total and cartenoid) and carbohy-drate content were studied in six genotypes of mint (Mentha spicata L.) in pots. The AM inoculation significant-ly increased the fresh and dry weight of shoot، chlorophyll content، nutrient content (P، Zn and Mn) of the shoots and roots، and the concentration of carbohydrate in leaves as compared to non-inoculated plants. The present results revealed that mint plants inoculated with AMF (Glomus sp.) would make higher biomass production than non-mycorrhizal mint plants. However، it was found that the response of the plant was dependent on the genotype. Results also showed that inoculation with G. etunicatum proved to be more effective compared to G. mosseae regarding the increase in biomass of mint genotypes.