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Uptake and translocation of copper by mycorrhized seedlings Sterculia setigera (Del.) under Copper-contaminated soil.

Pot culture experiments were established to determine the effects of arbuscular mycorrhizal fungus (AMF) (Glomus fasciculatum) on tropical gum tree (Sterculia setigera Del.) grown in Copper contaminated soils. AMF and non-AMF inoculated plants were grown in sterilized substrates and subjected to different copper level (0, 200, 400, 600, 800 mg kg-1) concentrations. Root and shoot biomasses of inoculated plants were significantly higher than those of non-inoculated. Copper concentrations in roots were significantly higher than those in shoots in both the inoculated and non-inoculated plants, indicating this heavy metal mostly accumulated in the roots of plants. Copper translocation efficiency from root to shoot was lower in mycorrhizal plants than in nonmycorrhizal ones at any Copper addition levels. However, at high soil Copper concentrations, shoot Copper concentration of inoculated plant were significantly reduced by about 50% compared to non-inoculated plants. These results indicated that AMF could promote tropical gum tree growth and decrease the uptake of Cu at higher soil concentrations, thus protecting their hosts from the toxicity of Copper contaminated soils.

Auteur(s) : M. Ndiaye, Cavalli E., Diouf A., Diop T.A.
Pages : 022-028
Année de publication : 2011
Revue : Journal of Research in Agriculture
N° de volume : 1
Type : Article
Mise en ligne par : DIOUF Adama