TY - JOUR
T1 - Genotypic variations in the dynamics of metal concentrations in poplar leaves
T2 - A field study with a perspective on phytoremediation
AU - Pottier, Mathieu
AU - García De La Torre, Vanesa S.
AU - Victor, Cindy
AU - David, Laure C.
AU - Chalot, Michel
AU - Thomine, Sébastien
N1 - Publisher Copyright:
© 2015 Elsevier Ltd.
PY - 2015/1/1
Y1 - 2015/1/1
N2 - 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.
AB - 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.
KW - Keywords Cadmium Zinc Copper HMA NRAMP
U2 - 10.1016/j.envpol.2015.01.010
DO - 10.1016/j.envpol.2015.01.010
M3 - Article
C2 - 25622297
AN - SCOPUS:84927803545
SN - 0269-7491
VL - 199
SP - 73
EP - 82
JO - Environmental Pollution
JF - Environmental Pollution
ER -