These result indicated that bana grass was a cd accumulator while vetiver grass was a cd exclude The ratio of root to shoot biomass was significantly increased in vetiver grass , while it was unchanged in bana grass by cd pollution.This suggests that exclude may allocate more energy to roots than shoots under cd pollution compared to un-contaminated condition. While accumulator may allocate equal proportions of energy to roots and shoots. For bana grass,soil Cd pollution significantly decreased the concentration of Fe and Mn in roots as well as the translocation factors of Zn and k