Interaction Between Cadmium and Lead and the Effects of These on the Concentration of Zinc and Manganese in Sunflower

Document Type: Original Research Paper


Department of Soil Science, University College of Agriculture & Natural Resources, University of Tehran, Karaj, Iran


The pollution of soil by heavy metals is considered to be quite a big problem in many areas of
the world. To limit the accumulation of lead and cadmium from soil in the products, a correct understanding of
the characteristics and specifications of the translocation of cadmium and lead is necessary. In order to evaluate
the effects of cadmium and lead interaction on zinc and manganese concentration, three levels of cadmium (0,
100 and 200 mg/kg), and three levels of lead (0, 200 and 400mg/kg) were tested on a sunflower cultivar SHF81-
85 in a factorial experimental design with three replications. The results showed that cadmium has increased
the cadmium and lead concentration in the shoot and root, while the effects of lead, were only significant on the
concentration of lead in the shoot, and the concentration of both cadmium and lead in the root (p<0.05).
Cadmium and lead revealed a preventing effect on zinc and manganese concentration in the root and shoot of
the plant. More investigations at field conditions are recommended.