For vetiver grass ,soil Cd pollution signifcantly decreased the concentration of Fe in roots and had no influence on the translocation factor of Fe,Mn and Ca.Soil Cd pollution showed no significant effect on chlorophyll content and photosynthesic rates in either of the grasses. The water content and leaf transpiration rate were significantly increased by Cd pollution in bana grass. While they were unchanged in vetiver grass. The results indicated that the energy allocation and mineral nutrition characteristics may aid in screening suitable plant species for photoremediation