researchers are interested in using hyperaccumulator and accumulator plants to
decontaminate Cd polluted soils. To investigate Cd tolerance, uptake and accumulation by Amaranthus
hybridus L., Cd concentration gradients were applied to a soil and hydroponics solutions following a field survey.
A. hybridus grew normally at added Cd concentrations≤90mgkg−1 and≤20mgL−1 in the soil culture
and in the hydroponics solutions, respectively. In the hydroponics solutions, peroxidase activity showed
a quadratic relationship and catalase activity changed irregularly with increasing Cd concentrations. The
highest Cd concentration and accumulation in shoots were 241.56mgkg−1 and 1006.95g pot−1 in the
soil culture, and 354.56mgkg−1 and 668.42g pot−1 in the hydroponics experiment. Bioconcentration
factors in soil culture and hydroponics solutions were 0.58–1.22 and 5.18–17.55, and translocation factors
were 0.64–1.50 and 0.33–0.92, respectively. A. hybridus has potential phytoremediation capability
in Cd polluted soils.