title: Bidens tripartite L.: a Cd-accumulator confirmed by pot culture and site sampling experiment.
abstract: Characteristics of accumulation and tolerance of cadmium (Cd) in Bidens tripartite L. were investigated to identify Cd-accumulating properties. In this study, pot culture experiment and site sampling experiments were conducted to assess whether this plant is a heavy metal hyperaccumulator or accumulator. The results indicated that the Cd enrichment factor (concentration in plant/soil) and Cd translocation factor (concentration in shoot/root) of B. tripartite was principally >1 in pot culture and concentration gradient experiments. Shoot biomass was not reduced significantly (p<0.05) compared to the controls. However, the Cd concentration in B. tripartite shoots was not higher than 100 mg kg(-1), the threshold concentration for a Cd-hyperaccumulator. In the site sampling experiment, B. tripartite also showed Cd-accumulator properties. Based on these results, B. tripartite could be identified as a Cd-accumulator. Thus, B. tripartite should only be considered as a Cd-accumulator.
authors.affiliation: Key Laboratory of Terrestrial Ecological Process, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, PR China. shuhewei@yahoo.com.cn
authors.forename: Shuhe
authors.initials: S
authors.lastname: Wei
authors.forename: Rongcheng
authors.initials: R
authors.lastname: Niu
authors.forename: Mrittunjai
authors.initials: M
authors.lastname: Srivastava
authors.forename: Qixing
authors.initials: Q
authors.lastname: Zhou
authors.forename: Zhijie
authors.initials: Z
authors.lastname: Wu
authors.forename: Tieheng
authors.initials: T
authors.lastname: Sun
authors.forename: Yahu
authors.initials: Y
authors.lastname: Hu
authors.forename: Yunmeng
authors.initials: Y
authors.lastname: Li
mesh_terms: D031176:Bidens / Q000737:chemistry / Q000378:metabolism*; D018533:Biomass; D002104:Cadmium / Q000737:chemistry / Q000378:metabolism*; D018515:Plant Leaves / Q000737:chemistry; D018520:Plant Shoots; D018547:Plant Stems / Q000737:chemistry; D012722:Sewage / Q000032:analysis; D012987:Soil / Q000032:analysis; D007507:Therapeutic Irrigation
chemical_list: D012722:Sewage; D012987:Soil; D002104:Cadmium