KOLBAS, Aliaksandr; KOLBAS, Natallia; MARCHAND, Lilian; HERZIG, Rolf; MENCH, Michel

doi:10.1007/s11356-018-1837-1

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KOLBAS, Aliaksandr
Biodiversité, Gènes & Communautés [BioGeCo]
State University

KOLBAS, Natallia
State University

MARCHAND, Lilian
Biodiversité, Gènes & Communautés [BioGeCo]

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Article de revue

Ce document a été publié dans

Environmental Science and Pollution Research. 2018, vol. 25, n° 17, p. 16686-16701

Springer Verlag

Résumé en anglais

The potential use of a metal-tolerant sunflower mutant line for biomonitoring Cu phytoavailability, Cu-induced soil phytotoxicity, and Cu phytoextraction was assessed on a Cu-contaminated soil series (13–1020 mg Cu kg−1) obtained by fading a sandy topsoil from a wood preservation site with a similar uncontaminated soil. Morphological and functional plant responses as well as shoot, leaf, and root ionomes were measured after a 1-month pot experiment. Hypocotyl length, shoot and root dry weight (DW) yields, and leaf area gradually decreased as soil Cu exposure rose. Their dose-response curves (DRC) plotted against indicators of Cu exposure were generally well fitted by sigmoidal curves. The half-maximal effective concentration (EC50) of morphological parameters ranged between 203 and 333 mg Cu kg−1 soil, corresponding to 290–430 μg Cu L−1 in the soil pore water, and 20 ± 5 mg Cu kg−1 DW in the shoots. The EC10 for shoot Cu concentration (13–15 mg Cu kg−1 DW) coincided to 166 mg Cu kg−1 soil. Total chlorophyll content and total antioxidant capacity (TAC) were early biomarkers (EC10: 23 and 51 mg Cu kg−1 soil). Their DRC displayed a biphasic response. Photosynthetic pigment contents, e.g., carotenoids, correlated with TAC. Ionome was changed in Cu-stressed roots, shoots, and leaves. Shoot Cu removal peaked roughly at 280 μg Cu L−1 in the soil pore water.< Réduire

Mots clés en anglais

antioxidant capacity

biomarker

carotenoid

helianthus annuus L.

phytotoxicity

phytoremediation

DOI

http://dx.doi.org/10.1007/s11356-018-1837-1

Project ANR

Intensify production, transform biomass to energy and novel goods and protect soils in Europe - ANR-15-SUSF-0007

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Importé de hal

Unités de recherche

BioGeCo (Biodiversité Gènes & Communautés) - UMR 1202