Trace element transfer from two contaminated soil series to Medicago sativa and one of its herbivores, Spodoptera exigua
FRAYSSINET, Marie
Diversité, Génomes & Interactions Microorganismes - Insectes [Montpellier] [DGIMI]
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Diversité, Génomes & Interactions Microorganismes - Insectes [Montpellier] [DGIMI]
FRAYSSINET, Marie
Diversité, Génomes & Interactions Microorganismes - Insectes [Montpellier] [DGIMI]
< Reduce
Diversité, Génomes & Interactions Microorganismes - Insectes [Montpellier] [DGIMI]
Language
en
Article de revue
This item was published in
International Journal of Phytoremediation. 2018, vol. 20, n° 7, p. 650-657
Taylor & Francis
English Abstract
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 ...Read more >
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.Read less <
English Keywords
Biotransfer
Food web
Herbivore
Phytomanagement
Phytotoxicity
ANR Project
Intensify production, transform biomass to energy and novel goods and protect soils in Europe - ANR-15-SUSF-0007
Origin
Hal imported