Zinc and cadmium effects on growth and ion distribution in Populus tremula × Populus alba
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The effects of cadmium and zinc on growth and mineral distribution in Populus tremula × P. alba genotype 717-1B4 were investigated. Exposure to 360 mg(Cd) kg−1(soil) resulted in accumulation of Cd in all organs and inhibition of primary and secondary growth as well as of the net photosynthetic rate. No growth inhibition occurred under zinc exposure. Cd was mainly stored in the woody parts of stem, whereas zinc was preferentially localized in the leaves. Cd treatment also altered distribution of Zn2+, Ca2+, Mg2+, K+, and Fe2+ in different organs.
Additional key wordspoplar mineral distribution net photosynthetic rate stomatal conductance
net photosynthetic rate
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Thomas Durand was supported by a PhD fellowship of the Luxembourg Ministry of Culture, Higher Education and Research (BFR 05/094). The authors are grateful to Alain Guichard, Gilles Moreau and Julie Jumeau (Laboratoire de Biologie des Ligneux et des Grandes Cultures) for their excellent technical assistance. P.L. and D.M. contributed equally as senior author.
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