| Autor: |
Kozlov MV; Section of Ecology, University of Turku, FIN-20014 Turku, Finland. mikov@utu.fi, Haukioja E, Bakhtiarov AV, Stroganov DN, Zimina SN |
| Jazyk: |
angličtina |
| Zdroj: |
Environmental pollution (Barking, Essex : 1987) [Environ Pollut] 2000 Mar; Vol. 107 (3), pp. 413-20. |
| DOI: |
10.1016/s0269-7491(99)00159-1 |
| Abstrakt: |
We investigated root versus canopy uptake of nickel and copper by mountain birch, Betula pubescens subsp. czerepanovi, close to a nickel-copper smelter on the Kola Peninsula, northwest Russia. To distinguish between aerial contamination of leaf surfaces by dust particles and root-derived contamination of leaves by soluble metals, we transplanted seedlings from a control site to clean and metal-contaminated soils and exposed these seedlings both in clean and polluted sites. Patterns of leaf surface contamination and root uptake were similar for nickel and copper; however, nickel but not copper was effectively translocated from roots to shoots and leaves. The majority (80-95%) of nickel and copper found in birch foliage in the heavily contaminated site was due to deposition of dust particles on leaf surfaces; 32-40% of foliar nickel and 9-19% of foliar copper were in water soluble forms. Washing of fresh leaves removed only a minor part of surface contaminants; boiling of unwashed leaves in distilled water for 15 min removed >90% of soluble nickel and copper. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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