Interest of angelica cultivation and mycorrhizal inoculation for the phytomanagement of trace elements-polluted soil: a long-term field study - Archive ouverte HAL
Communication Dans Un Congrès Année : 2023

Interest of angelica cultivation and mycorrhizal inoculation for the phytomanagement of trace elements-polluted soil: a long-term field study

Résumé

Phytomanagement is based both on the choice of the best-adapted phytotechnology to reduce the pollutant risks and the strategy used for the valorization of biomass produced on the contaminated soil. In this context, the cultivation of aromatic plants for essential oils (EO) production was recently presented as an innovative and economically viable alternative for the phytomanagement of trace elements (TE)-polluted soils (Raveau et al., 2021). Hence, the current study aims at evaluating during two years the suitability of the angelica (Angelica archangelica) in situ cultivation and arbuscular mycorrhizal inoculation for the phytomanagement of aged TE-polluted soils, taking into account plants' growth, biomass production, EO content and the soil functioning through different indicators: microbial biomass (Phospholipids fatty acids - PLFA), structure of soil microbial communities (metagenomic analysis - MiseqIllumina) and microbial functional diversity (Biolog ecoplate). Our results showed that angelica is able to develop on heavily TE-polluted soil (7 ppm Cd, 394 ppm Pb and 443 ppm Zn). Nevertheless, mycorrhizal inoculation did not increase plant biomass and EO yield probably due to the similar mycorrhizal rates observed in inoculated and non-inoculated plants (26.7, 25.9% respectively in 2020 and 41.3, 34.3% in 2021) caused by spontaneous mycorrhization. Actinobacteria and Proteobacteria phyla (90%) as well as the Ascomycota (95%) were found to be the major phyla in the polluted soil. A significant effect of culture time on the bacterial and fungal communities of the polluted soil has been observed, resulting in an increase in total microbial biomass. Furthermore, the mycorrhizal inoculation significantly improved bacterial diversity and biomass after two culture years. Finally, the microbiota of TE-polluted soil responds positively to angelica cultivation and tends to increase after two successive years of cultivation. The benefit of angelica culture and mycorrhizal inoculation for TE-phytostabilisation remains to be studied.
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Dates et versions

hal-04350846 , version 1 (18-12-2023)

Identifiants

  • HAL Id : hal-04350846 , version 1

Citer

Julien Langrand, Joël Fontaine, Robin Raveau, Natacha Facon, Benoît Tisserant, et al.. Interest of angelica cultivation and mycorrhizal inoculation for the phytomanagement of trace elements-polluted soil: a long-term field study. International Phytotechnologies Conference, May 2023, Chicago, Illinois,, United States. ⟨hal-04350846⟩
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