Article (Scientific journals)
Genotypic variations in the dynamics of metal concentrations in poplar leaves: a field study with a perspective on phytoremediation.
Pottier, Mathieu; Garcia de la Torre, Vanesa S.; Victor, Cindy et al.
2015In Environmental Pollution, 199, p. 73-82
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Keywords :
Biodegradation, Environmental; Cadmium/metabolism; Environmental Pollution/analysis; Metals/analysis; Plant Leaves/chemistry; Populus/chemistry/genetics/metabolism; Soil; Soil Pollutants/analysis; Trace Elements/analysis; Zinc/analysis; Cadmium; Copper; HMA; NRAMP; Zinc
Abstract :
[en] Poplar is commonly used for phytoremediation of metal polluted soils. However, the high concentrations of trace elements present in leaves may return to soil upon leaf abscission. To investigate the mechanisms controlling leaf metal content, metal concentrations and expression levels of genes involved in metal transport were monitored at different developmental stages on leaves from different poplar genotypes growing on a contaminated field. Large differences in leaf metal concentrations were observed among genotypes. Whereas Mg was remobilized during senescence, Zn and Cd accumulation continued until leaf abscission in all genotypes. A positive correlation between Natural Resistance Associated Macrophage Protein 1 (NRAMP1) expression levels and Zn bio-concentration factors was observed. Principal component analyses of metal concentrations and gene expression levels clearly discriminated poplar genotypes. This study highlights a general absence of trace element remobilization from poplar leaves despite genotype specificities in the control of leaf metal homeostasis.
Disciplines :
Environmental sciences & ecology
Author, co-author :
Pottier, Mathieu  ;  Université de Liège - ULiège > Département des sciences de la vie > Care "PhytoSYSTEMS"
Garcia de la Torre, Vanesa S.
Victor, Cindy
David, Laure C.
Chalot, Michel
Thomine, Sebastien
Language :
English
Title :
Genotypic variations in the dynamics of metal concentrations in poplar leaves: a field study with a perspective on phytoremediation.
Publication date :
2015
Journal title :
Environmental Pollution
ISSN :
0269-7491
eISSN :
1873-6424
Publisher :
Elsevier, United Kingdom
Volume :
199
Pages :
73-82
Peer reviewed :
Peer Reviewed verified by ORBi
Commentary :
Copyright (c) 2015 Elsevier Ltd. All rights reserved.
Available on ORBi :
since 14 December 2017

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