Abstract:

A pot experiment was carried out to investigate the accumulation and transfer of Cd and Pb in three traditional Chinese herbal medicines, namely Perilla frutescens(L.)Britt, Herba Plantaginis and Herba Leonuri, which were cultivated under single and compound pollution of Cd and Pb. The results showed that Perilla frutescens(L.)Britt had a strong tolerantion to Cd toxicity, and the tolerance to Pb toxicity followed the order: Herba Plantaginis> Herba Leonuri> Perilla frutescens(L.)Britt. Cd-Pb combined pollution had a synergistic effect on the growth of Perilla frutescens(L.)Britt and Herba Plantaginis, while had an antagonism effect on the growth of Herba Leonuri. The accumulation ability of Cd and Pb in the shoot followed the order : Herba Plantaginis > Herba Leonuri > Perilla frutescens(L.)Britt. Cd-Pb compound pollution facilitated Perilla frutescens(L.)Britt and Herba Plantaginis ’s absorbability of Cd but had contrast effect on Herba Leonuri .The compound pollution had no distinct influence on the accumulation of Herba Plantaginis to Pb, but help to the accumulation of Pb by Perilla frutescens(L.)Britt and Herba Leonuri. Cd-Pb compound pollution had an antagonistic effect on the transfer of Cd from root to shoot in the three traditional Chinese herbs medicine and had stimulative，unavailable and restraining effect on the three traditional Chinese herbs medicine in turn respectively.