| A pot experiment was conducted in a greenhouse to evaluate the cadmium tolerance and accumulation characteristics of Commelina communis Linn. The dry weight of plant increase with the Cd concentration increase in soil, and was maximum when soil Cd concentration was 8 mg/kg. Then the dry weight of plant decrease and was minimum at soil Cd 60 mg/kg. However, the dry weight of plant was not influenced by 100 mg/kg Cd pollution. Cadmium concentration and extraction amounts of C. communis increased as the Cd concentration increased in soil and were the maximum when soil Cd was 100 mg/kg. When soils were contaminated by 100 mg/kg Cd, C.communis accumulated 281, 35 and 34 mg/kg Cd in roots, stem and leaf, respectively, with 98, 30 and 30 滋g/plant Cd extraction amounts. The study results indicated that C. communis has strong tolerance to Cd, and could be regarded as a candidate species for phytostabilization of Cd contamination. |
