The biomass lowered with Cd concentration increase and Cg SIV was quite more susceptible to Cd than Pt 715.The toxic indexes of cadmium were 0.005 5 for Pt 715 and 0.033 3 for Cg SIV,respectively.

• 其中；Cg SIV的生长对镉十分敏感；而Pt 715对镉具极高抗性；镉对两种外生菌根真菌的毒性指数分别为0.；005 5(Pt 715)和0