title: Hyperaccumulative property comparison of 24 weed species to heavy metals using a pot culture experiment.
abstract: The screening of hyperaccumulators is still very much needed for phytoremediation. With properties such as strong tolerance to adverse environment, fast growing and highly reproductive rate, weed species may be an ideal plant for phytoremediation. The objectives of this study were to examine the tolerance and hyperaccumulative characteristics of 24 species in 9 families to Cd, Pb, Cu and Zn by using the outdoor pot-culture experiment. In the screening experiment, only Conyza canadensis and Rorippa globosa displayed Cd-hyperaccumulative characteristics. In a further concentration gradient experiment, C. canadensis was affirmed that it is not a Cd hyperaccumulator. Only R. globosa, indicated all Cd hyperaccumulative characteristics, especially Cd concentration in its stems and leaves were higher than 100 mg/kg, the minimum Cd concentration what a Cd-hyperaccumulator should accumulate. Thus, R. globosa was further validated as a Cd-hyperaccumulator.
authors.affiliation: Key Laboratory of Terrestrial Ecological Process, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, People's Republic of China. shuhewei@yahoo.com.cn
authors.forename: Shuhe
authors.initials: S
authors.lastname: Wei
authors.forename: Qixing
authors.initials: Q
authors.lastname: Zhou
authors.forename: Hong
authors.initials: H
authors.lastname: Xiao
authors.forename: Chuanjie
authors.initials: C
authors.lastname: Yang
authors.forename: Yahu
authors.initials: Y
authors.lastname: Hu
authors.forename: Liping
authors.initials: L
authors.lastname: Ren
mesh_terms: D000383:Agriculture; D001673:Biodegradation, Environmental; D035401:Conyza / Q000033:anatomy & histology / Q000378:metabolism; D019216:Metals, Heavy / Q000737:chemistry / Q000378:metabolism*; D010944:Plants / Q000033:anatomy & histology / Q000378:metabolism*; D031225:Rorippa / Q000033:anatomy & histology / Q000378:metabolism; D012987:Soil / Q000032:analysis; D012989:Soil Pollutants / Q000737:chemistry / Q000378:metabolism*
chemical_list: D019216:Metals, Heavy; D012987:Soil; D012989:Soil Pollutants