J. Phys. IV France 107 (2003) 1115
Metal accumulating plants: Medium's roleJ. Rabier1, P. Prudent2, B. Szymanska1 and J.-P. Mevy1
1 Laboratoire Dynamique et Ressource du Végétal, Université de Provence, 3 place Victor Hugo, 13331 Marseille cedex, France
2 Laboratoire de Chimie et Environnement, Université de Provence, 3 place Victor Hugo, 13331 Marseille cedex, France
To evaluate phytoremediation potentialities by metal accumulation in tolerant plants, trials are carried out using in vitro cultures. Organie compounds influence on metal accumulation is studied with metals supplemented media. The tested compounds on zinc and lead absorption by Brassica juncea, are chelating agents (EDTA, citric acid) and soluble organic fractions of compost. EDTA seems to enhance the transfer of lead in plant but it is the opposite in the case of zinc. Citric acid stimulates root absorption for both zinc and lead. For the aqueous extracts of compost, variable effects are obtained according to the origin of compost (green wastes and food wastes). In'all tested conditions of cultures, zinc is mainly exported towards shoot while lead is stored in root.
© EDP Sciences 2003