Survey The Effect of Cadmium on Dry Weight, Growth and Absorbed of Species Tree of Platanus orientalis

Heavy metals such as Cadmium are created by major urban, industrial and agricultural activities and cause pollution. According to increasing need to forestry in Iran, conducting a comprehensive research on fast-growing Platanus orientalisspecies and its role in absorbing heavy metals like Cadmium is necessary. For this purpose, the leaves and stems of plantain and soil samples from the downtown of Tehran. Leaves and stems of plantain and soil samples outside of Tehran as controls were selected randomly and were then harvested. Shoot dry weight and accumulation of cadmium in the plant was tested. The results showed that the concentration of cadmium, shoot dry weight was significantly reduced, yet significant differences between shoot dry weight was observed in the control area and the downtown area. The results showed that the concentration of cadmium, shoot dry weight was significantly reduced, yet significant differences between shoot dry weight was observed in the control area and downtown area of Tehran. The concentration of cadmium in leaves and stems in the control area with the downtown area has significant difference at 95 percent.