Nickel speciation in Sebertia acuminata,a plant growing on a lateritic soil of New Caledonia |
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Authors: | Nicolas Perrier Fabrice Colin Tanguy Jaffré Jean-Paul Ambrosi Jérôme Rose Jean-Yves Bottero |
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Affiliation: | 1. IRD Nouméa, BP A5, 98848 Nouméa, New Caledonia;2. CEREGE, BP 80, 13545 Aix-en-Provence cedex 02, France |
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Abstract: | Nickel speciation in a nickel hyperaccumulating plant (Sebertia acuminata) and its associated soil of southern New Caledonia was studied using various analytical methods. The soil is formed of iron oxides (goethite, hematite), which contain almost all the nickel. The available nickel is probably linked to the organic matter in the litter. Sebertia acuminata, acts as a nickel pump, and concentrates the metal in its leaves. It partitions nickel and silica; nickel is concentrated in the cells (probably in the vacuoles) as organometallic complexes, whereas silica forms the framework of the cells, and the phytolithes. A thorough study of these plants seems essential in order to define the soil–plant relations, and to propose appropriate ways for ecological restoration. To cite this article: N. Perrier et al., C. R. Geoscience 336 (2004). |
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Keywords: | nickel nickel hyperaccumulating plants lateritic soils bioavailibility New Caledonia nickel plante hyper-accumulatrice de nickel sol latéritique biodisponibilité Nouvelle-Calédonie |
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