Effects of Soil pH on the Growth and Cadmium Accumulation in Polygonum hydropiper (L.) in Low and Moderately Cadmium-Contaminated Paddy Soil

Wetland macrophytes have advantages when used in the remediation of cadmium (Cd)-contaminated paddy fields because they can adapt to overly wet soil environments; however, only a few studies tested efficiency Cd phytoremediation. In this study, we investigated effect pH (pHs 5, 6, and 7) on accumulation translocation by Polygonum hydropiper (L.) low moderately Cd-contaminated (0.56 0.92 mg/kg, respectively). Our results indicated that stems roots, as well subcellular distribution P. hydropiper, was affected pH, with significant interactions between level. At levels, stem root contents were higher at value 6. addition, values, proportion distributed cell wall increased, whereas organelles decreased. The content roots significantly decreased increase moderate soil. decreased, increased. factor (TF) than one all treatments, indicating it effectively transport root-absorbed aboveground shoots. Based relatively high bioconcentration TF, has potential remediate Cd-polluted Furthermore, be enhanced adjusting per soil-Cd pollution.