Abstract
ABSTRACTSeveral species of the Noccaea genus are known for their hyperaccumulation ability especially in the case of Cd, Ni, and Zn. However, ambiguous observations were previously published concerning their accumulation properties for Pb. The Pb accumulation properties of Noccaea rotundifolia, Noccaea montana, and Noccaea jankae hungarica plants were tested in field and pot experiments in soils differing in the mobile pool of Pb, as well as in soilless hydroponic culture. The Pb content in the dry biomass of plant shoots reached up to 54 mg/kg in field conditions and 84 mg/kg in pots regardless of the bioavailable pool of Pb in the pots. The hydroponic experiment showed a stepwise increase in Pb content in plant biomass with increasing Pb concentration in the solution, but the predominant proportion of plant Pb was retained in the roots. Although the hyperaccumulation ability of some of the Noccaea species is widely discussed in the literature, our results are in agreement with those suggesting no Pb hyperaccumulation potential in these plants.
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