The Evaluation of Uptake of Cd and Zn by Gladiola, Narcissus and Tulip

In order to assess uptake potential of Cd an Zn by Gladiola، Narcissus and Tulip، the greenhouse study was performed in contamination soils as factorial arrangement based on the complete randomized design with different levels of pollution (A as higher pollutant، B as lower pollutant and C as no pollutant) and different flowers (Gladiola، Narcissus and Tulip) with four replicates in faculty of agriculture، Bu-Ali Sina University. The result showed that with increasing heavy metals concentration in soils، dry matters of Gladiola and Tulip were decreased، compared with the control; however there was no change for dry matter in Narcissus. The accumulation of Cd and Zn by flowers increased with increasing soil pollution. The Cd concentration was higher (3. 48 mg/kg averagely) in aerial parts of plant harvested from the A level treated soils which was significantly difference with B and C levels treated soil. There was no difference between the B and C level treated significantly. The Zn concentration in the aerial parts of plant was in the order of A، B and C level treated soils (in average 26. 03، 17. 46 and 13. 99 mg/kg respectively). The Cd uptake was equal in all parts of Gladiola، Narcissus and Tulip. The Zn concentration was higher in the aerial parts of Tulip than Gladiola and Narcissus that of underground was equal. The accumulation and translocation Indices of Cd was not affected by increased soil Cd concentration significantly. With increased Zn concentration in soil، accumulation index decreased while translocation index was not changed significantly. The translocation and accumulation index of Cd and Zn was similar for flowers. Thus accumulation of Cd and Zn in saleable parts of Gladiola، Narcissus and Tulip led to clean up the contaminated soils.