Response of Poplar and Associated Fungal Endophytic Communities to a PAH Contamination Gradient.

Fiche publication

Date publication

mai 2022

Journal

International journal of molecular sciences

Auteurs

Membres identifiés du Cancéropôle Est :
Dr HEINTZ Dimitri , Mme ZUMSTEG Julie

Tous les auteurs :
Gréau L, Blaudez D, Heintz D, Zumsteg J, Billet D, Cébron A

Lien Pubmed

https://www.ncbi.nlm.nih.gov/pubmed/35682588

Résumé

Microbial populations associated to poplar are well described in non-contaminated and metal-contaminated environments but more poorly in the context of polycyclic aromatic hydrocarbon (PAH) contamination. This study aimed to understand how a gradient of phenanthrene (PHE) contamination affects poplar growth and the fungal microbiome in both soil and plant endosphere (roots, stems and leaves). Plant growth and fitness parameters indicated that the growth of was impaired when PHE concentration increased above 400 mg kg. Values of alpha-diversity indicators of fungal diversity and richness were not affected by the PHE gradient. The PHE contamination had a stronger impact on the fungal community composition in the soil and root compartments compared to that of the aboveground organs. Most of the indicator species whose relative abundance was correlated with PHE contamination decreased along the gradient indicating a toxic effect of PHE on these fungal OTUs (Operational Taxonomic Units). However, the relative abundance of some OTUs such as , and , potentially linked to PHE degradation or being plant-beneficial taxa, increased along the gradient. Finally, this study allowed a deeper understanding of the dual response of plant and fungal communities in the case of a soil PAH contamination gradient leading to new perspectives on fungal assisted phytoremediation.