Effect of Pb on the Seed Germination of Eclipta Prostrata

The seed of Eclipta prostrata was adopted as material to study the effect of factors. such as the lead acetate[(CH_3COO)_2·3H_2O]with different concentration on the seed germination of Eclipta prostrata.The experiment result showed that the lead acetate with different concentration had different effects on the seed germination.The seed treated with 50mg/L,the germination rate and germination index were higher than that of the control,when concentration was over 200mg/L,the germination rate was decreased obviously,and with the increasing of concentration, the germination vigor,germination index and number of cotyledon which fully opened were all decreased obviously.