Dépôt numérique
RECHERCHER

Lead Exclusion and Copper Translocation in Black Spruce Needles.

Aznar, Jean-Christophe; Richer-Laflèche, Marc; Bégin, Christian; Bégin, Yves (2009). Lead Exclusion and Copper Translocation in Black Spruce Needles. Water, Air, and Soil Pollution , vol. 203 , nº 1-4. p. 139-145. DOI: 10.1007/s11270-009-9997-8.

Ce document n'est pas hébergé sur EspaceINRS.

Résumé

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: http://espace.inrs.ca/id/eprint/10819

Actions (Identification requise)

Modifier la notice Modifier la notice