Abstract: Cultivated in different lead and cadmium solution for 15 days, T.cymbifolium showed different poisonous symptoms.The main appearance was losing green, even died in higher stress concentration.At the same time, we measured the accumulation of lead and cadmium inmosses, the results showed:this moss had strong absorbing ability to lead and cadmium, especially to lead.The contents of lead and cadmium increased with the increasing of stress concentration.In joint pollution, the contents were higher than those of single pollution, the relationship of lead and cadmium appeared synergistic.

Key words: Pb, Cd, accumulation, synergy