GARROUJ, Myriam; MARCHAND, Lilian; FRAYSSINET, Marie; MENCH, Michel; CASTAGNEYROL, Bastien

doi:10.1080/15226514.2017.1374342

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GARROUJ, Myriam
Biodiversité, Gènes & Communautés [BioGeCo]

MARCHAND, Lilian
Biodiversité, Gènes & Communautés [BioGeCo]

FRAYSSINET, Marie
Diversité, Génomes & Interactions Microorganismes - Insectes [Montpellier] [DGIMI]

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Article de revue

Ce document a été publié dans

International Journal of Phytoremediation. 2018, vol. 20, n° 7, p. 650-657

Taylor & Francis

Résumé en anglais

Alfalfa was cultivated in two potted soil series obtained from two sandy soils contaminated by Cu (SM) and metal(loids)/PAH (CD). Shoot production was monitored for 8 weeks. Then, larvae of Spodoptera exigua were reared on alfalfa of both soil series for eight days. A biotest (using Phaseolus vulgaris) was used to assess the soil phytotoxicity. Increasing soil contamination reduced P. vulgaris growth, but alfalfa growth was only reduced on the SM soil series. Exposure to the SM soil was mirrored by shoot Cu and Cr concentrations of alfalfa (respectively, in mg kg -1 DW, Cu and Cr ranged from 11.9 and 0.4 in the CTRL soil to 98.5 and 1.2 in the SM one). Exposure to the CD soil series was mirrored by shoot Zn concentrations (i.e. 48 to 91.6 mg kg-1 DW). Internal metal(loid) concentrations of S. exigua remained generally steady across both soil series (respectively Cd 0.05-0.16, Cr 0.5-3.3, Cu 5.8-98.5, Ni 0.6-1.6, Pb 0.4-1.3 and Zn 57-337 mg kg-1 DW), and most of the associated transfer factors were lower than 1. Here, due to the excluder phenotype of alfalfa across our TE contamination gradients, S. exigua could cope with high total metal(loid) concentration in both contaminated soils.< Réduire

Mots clés en anglais

Biotransfer

Food web

Herbivore

Phytomanagement

Phytotoxicity

DOI

http://dx.doi.org/10.1080/15226514.2017.1374342

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