Effect of Cd on the Uptake and Translocation of Pb, Cu, Zn, and Ni in Potato and Wheat Grown in Sierozem

Abstract

ABSTRACTThe effects of Cd on the uptake and translocation of metals in different plant species have received great attention and been widely investigated. We investigated and compared the influences of Cd on the growth and the uptake and translocation of Pb, Cu, Zn, Ni in potato and wheat. Although the inhibition dose of Cd in potato was higher than that in wheat, the average estimated field yields of two plants did not significantly differ. In sierozem for two plants during their growth, Cd increased the mobility of Zn, but the movement of other metals remained unaffected. In the aboveground parts, the concentrations and accumulation of metals decreased significantly. In the roots, the concentrations of Cu, Zn, and Ni first decreased and then exhibited no notable differences. The concentrations of Pb first exhibited no significant and then increased. The transport factor (TF) of metals (except Cd) decreased notably. The concentrations, accumulation and TF of metals in potato were remarkably higher than those in wheat. Our results suggest that the toxicity of Cd to wheat growth was not remarkably higher than that to potato growth, and the Cd ingestion risk to humans of wheat grown in the Cd-contaminated sierozem was lower.