Effects of Fe deficiency and P type ATPase inhibitor on Cu uptake by C.communis were investigated in this study.The results showed that Cu accumulation in C.communis was increased with the drop in Fe concentration in the nutrient solution.Cu uptake by C.communis was significantly enhanced by Fe deficiency in solutions with different Cu concentrations,which suggested that there was an inherent relationship between Cu uptake and element Fe.Cu concentrations in Fe deficient plants in Treatments EDTA Cu,NTA Cu,oxalate-Cu,and citrate-Cu,were lower than that in Treatment Cu.But Cu uptake,no matter what form of Cu,by Fe deficient plants was higher than that by Fe sufficient plants.Fe deficiency could lead to acidification of the rhizosphere of C.communis.Cu uptake was inhibited by P-type ATPase inhibitor Na₃VO₄.The promotion of Cu up take by Fe deficiency perhaps had nothing to do with the activity of P-type ATPase.