Abstract: The hydroponic experiments were conducted to study the Cu and pb accumulation characteristics of invasive plant Iva xanthifolia. The hydroponics results showed that, I.xanthifolia had high tolerance and a relatively strong enrichment effect on element Cu, Pb in the concentration of 1 to 16 mg·L^-1 Cu, 0.5 to 14 mg·L^-1 Pb, respectively. Moreover the heavy metals accumulation of above-ground parts (shoots) and the underground parts (roots) reached up to 607.59 mg·kg^-1(137.20 mg·kg^-1), 404.38 mg·kg^-1(34.53 mg·kg^-1) respectively. The enhancement factor and translocation factor were all greater than 1. Their average values were 11.39(4.43), 4.18(11.71) respectively.The enrichment order of all heavy metals is stem>leaf >root. Their metals concentrations in shoot were higher than that in roots. Compared with the control, the overground biomass of I.xanthifolia did not decreased significantly. These showed that I.xanthifolia had hyperaccumulative characteristics of heavy metals and could be applied to bioremediation Cu-contaminated soils, Pb-contaminated soils.

Key words: hyperaccumulator, invasive plant, Iva xanthifolia, Cu, Pb