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Accumulation characteristics of Cd in Polygonum pubescens Bl.  [2010]

Deng Hua, Guangxi Normal University, Guilin (China), School of Environment and Resources Li Mingshun, Guangxi Normal University, Guilin (China), School of Environment and Resources Chen Yingxu, Zhejiang University, Hangzhou (China), School of Environment and Resources

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[Objective] The research aimed to study the response and accumulation characteristics of Cd in Polygonum pubescens Bl. [Method] Taking Hoagland nutritional solution as the culture substrate, eight kinds of Cd concentrations (0, 25, 50, 100, 200, 500, 800, 1 000 mg/L) were set up. [Result] Under low concentrations of Cd (25 and 50 mg/L), the biomass of P. pubescens had no significant difference with CK (P0.05). Under all the test concentrations of Cd, Cd content in the roots and shoots of P. pubescens exceeded 100 mg/kg and the enrichment coefficients of Cd were over 1. With the increasing of Cd concentration, Cd content and Cd accumulation amount in P. pubescens increased significantly. When Cd concentration exceeded 50 mg/L, translocation capacity coefficient was greater than 1. [Conclusion] Polygonum pubescens has high tolerance and accumulation capacity of Cd, and it may has some potential on the phytoremediation of Cd-contaminated soil.