Impact des métaux lourds sur les interactions plante/ver de terre ...

Partie C : Résultats – Chapitre C-ICes résultats ont fait l’objet d’une publication sous presseà “Biology and Fertility of Soil”EFFECTS OF PONTOSCOLEX CORETHRURUS (Glossoscolecidae) ON LEADABSORPTION BY LANTANA CAMARA L. (Verbenacea)HUYNH Thi My Dung, DIEP My Hanh, PANDO Anne, PHAM-Thi Anh-Thu,ROULAND-LEFEVRE CorinneAbstracttel-00486649, version 1 - 26 May 2010The effects of the endogeic earthworm, Pontoscolex corethrurus (Glossoscolecidae), on thegrowth and lead phytoextraction process of Lantana camara (Verbenaceae) were studied onsoil artificially contaminated with 500 or 1000 mg Pb kg -1 . Earthworm activity significantlyincreased the shoot and root biomass in soils contaminated with lead (1.75 and 1.71 timeshigher for 500 mg Pb kg -1 , 1.63 and 1.27 times higher for 1000 mg Pb kg -1 , respectively).However, the effect of earthworms on plant growth was not significant in soils notcontaminated with lead. The lead phytoextraction by L. camara was also higher in the soilswith earthworms, with the total lead uptake higher by factors of 2.96 and 2.03 at the twodifferent contamination levels.Key words: Pontoscolex corethrurus, Lantana camara, Heavy metal, Phytoextraction.56