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Plant Biosystems 145, 2 (2011) 397-405
Cadmium and Zinc are differentially distributed in Populus tremula x P. alba exposed to metal excess
T.C. Durand 1, 2, 3, 4, Patrick Baillif 5, Patrick Albéric 5, S. Carpin 1, 2, P. Label 3, J.F. Hausman 4, D. Morabito 1, 2

Poplar plants were exposed during 61 days to a soil added with heavy metals so as to contain 300 mg Zn2þ.kg71 soil dry weight (SDW) (Zinc) or 50 mg Cd2þ.kg71 SDW (Cadmium). The Cd treatment induced a delayed growth of poplar, whereas Zn induced no change in physiological parameters. Both treatments resulted in a significant metal accumulation in plants. Zn2þ and Cd2þ exhibited contrasting distribution within tissues, indicating dissimilar handling by the plant. The main difference was the efficient compartmentalisation of Zn2þ in specific organ parts: old leaves and bark, while Cd2þ did not exhibit such a compartmentalisation. Results were also compared with a previous work where plants were exposed to 360 mg Cd2þ.kg71 SDW.
1:  Laboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC)
Université d'Orléans
2:  USC2030 (INRA)
Institut national de la recherche agronomique (INRA) : US2030
3:  Unité de recherche Amélioration, Génétique et Physiologie Forestières (UAGPF)
Institut national de la recherche agronomique (INRA) : UR0588
4:  Department Environment and Agrobiotechnologies
CRP-Santé Luxembourg
5:  Institut des Sciences de la Terre d'Orléans (ISTO)
CNRS : UMR6113 – INSU – Université d'Orléans – Université François Rabelais - Tours
Sciences of the Universe/Continental interfaces, environment

Environmental Sciences/Global Changes
Poplar – heavy metal – cadmium – zinc