Kalimeris integrifolia Turcz. ex DC.: an accumulator of Cd.
Phytoremediation is a traditional technique that uses vegetation to remediate contaminants from water, soil and sediments. This is a solar-driven, aesthetically pleasing, and cost effective technology. In a former published article, Kalimeris integrifolia Turcz. ex DC. indicated some basic properties of hyperaccumulators for cadmium (Cd). In this study, concentration gradient experiment and sample-analyzing experiments were used to assess whether this plant is a Cd-hyperaccumulator. The results showed the Cd enrichment factor (concentration in plant/soil) and Cd translocation factor (concentration in shoot/root) of K. integrifolia was basically >1 in concentration gradient experiment. Shoot biomass was not reduced significantly (p<0.05) compared to the control. However, the Cd concentration in K. integrifolia shoots was not higher than 100 mg kg(-1), the threshold concentration for a Cd-hyperaccumulator. Thus, K. integrifolia should only be considered as a Cd-accumulator. In the sample-analyzing experiments conducted in a Pb-Zn mine area and a wastewater irrigation region, K. integrifolia also showed Cd-accumulator properties. Based on these results, K. integrifolia could be identified as a Cd-accumulator.
Wei
Shuhe
S
Key Laboratory of Terrestrial Ecological Process, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, PR China. shuhewei@yahoo.com.cn
Zhou
Qixing
Q
Srivastava
Mrittunjai
M
Xiao
Hong
H
Yang
Chuanjie
C
Zhang
Qianru
Q
D019659:Asteraceae / Q000378:metabolism*; D002104:Cadmium / Q000378:metabolism*; D008906:Mining; D012989:Soil Pollutants / Q000378:metabolism*
D012989:Soil Pollutants; D002104:Cadmium