title: Chelator effects on bioconcentration and translocation of cadmium by hyperaccumulators, Tagetes patula and Impatiens walleriana.
abstract: French marigold (Tagetes patula) and impatiens (Impatiens walleriana) can act as hyperaccumulator plants for removal of cadmium (Cd) from contaminated sites. In this study, an exponential decay model was used to predict the maximum removal of Cd from artificially spiked soils by impatiens. Application of a chelator, EDTA, was also assessed for effects on the bioconcentration (BCF) and translocation (TF) factors of the two species with four replicates. Exposure to Cd significantly decreased the biomass of two plant species. Impatiens and French marigold accumulated Cd at a rate of 200-1200 mg Cd kg(-1) in shoots, with BCFs and TFs of 8.5-15 and 1.7-2.6, respectively.
authors: Department of Agricultural Chemistry, National Taiwan University, Taipei 10617, Taiwan. lan710306@yahoo.com.tw
authors: Jhen-Lian
authors: JL
authors: Wei
authors: Hung-Yu
authors: HY
authors: Lai
authors: Zueng-Sang
authors: ZS
authors: Chen
mesh_terms: D001673:Biodegradation, Environmental; D018533:Biomass; D002104:Cadmium / Q000378:metabolism*; D002614:Chelating Agents / Q000494:pharmacology*; D004492:Edetic Acid / Q000494:pharmacology*; D029069:Impatiens / Q000187:drug effects*; D012989:Soil Pollutants / Q000378:metabolism*; D031686:Tagetes / Q000187:drug effects*
chemical_list: D002614:Chelating Agents; D012989:Soil Pollutants; D002104:Cadmium; D004492:Edetic Acid