Aznar, Jean-Christophe; Richer-Laflèche, Marc; Bégin, Christian et Bégin, Yves (2009). Lead Exclusion and Copper Translocation in Black Spruce Needles. Water, Air, and Soil Pollution , vol. 203 , nº 1-4. pp. 139-145. DOI: 10.1007/s11270-009-9997-8.
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Current-year, 1-year-old, and 2-year-old needles were collected separately on 37 black spruce (Picea mariana Mill. B.S.P.) trees located on a heavy metal contamination gradient around the smelter in Murdochville, Québec (Canada). Needles were analyzed separately by year for the concentrations of Pb and Cu, a nonessential and an essential metal, respectively. Lead concentrations increased significantly with needle age in the highly contaminated area near the smelter. In contrast, Cu concentrations decreased with needle age in the same area. Our results support the hypothesis that the passive sequestration of toxic metals in the senescing foliage is a detoxification process contrasting with the active translocation of essential metals in the nonsenescent part of the foliage.
| Type de document: | Article |
|---|---|
| Mots-clés libres: | Murdochville; metal translocation; tree needles |
| Centre: | Centre Eau Terre Environnement |
| Date de dépôt: | 08 janv. 2021 19:22 |
| Dernière modification: | 08 janv. 2021 19:22 |
| URI: | https://espace.inrs.ca/id/eprint/10819 |
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