Effect of Arbuscular Mycorrhizal Fungi(Glomus Mosseae)on Cd Accumulation in Maize Plants

In a pot experiment,the effect of inoculation with AM fungus Glomus mosseae on Cd accumulation in maize plants under different cultural condition and Cd addition levels were investigated.The results indicated that Cd addition level significantly affected Cd accumulation in plants.With increasing Cd addition level,Cd concentration and accumulation in all treatments were markedly increased,and the Cd concentration and accumulation in roots were significantly higher than those in shoots.All the treatments were also different in different cultural condition.In sand culture,inoculation increased the biomass and colonization of maize plants,and inoculated plants had higher Cd concentration and accumulation in roots but lower Cd concentration and accumulation in shoots under high Cd addition level,compared to uninoculated controls.In soil culture,although plants enhanced Cd accumulation with increasing Cd addition level,inoculated plants decreased the Cd concentration significantly in shoots and roots,as compared to control.The experiment demonstrated that Glomus mosseae could effectively reduce Cd transferring to shoots in maize plants and retain much Cd in plant roots,which might be one of the key mechanisms for the alleviation of Cd phytotoxicity by mycorrhizal associations.