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2021-12-19 - Article/Dans un journal avec peer-review - Anglais - 8 page(s)

Delacuvellerie Alice , Geron Augustin , Gobert Sylvie, Wattiez Ruddy , "New insights into the functioning and structure of the PE and PP plastispheres from the Mediterranean Sea" in Environmental Pollution

  • Edition : Elsevier (United Kingdom)
  • Codes CREF : Biochimie (DI3112), Biologie moléculaire (DI3111), Microbiologie et protistologie [bacteriol.,virolog.,mycolog.] (DI3130)
  • Unités de recherche UMONS : Protéomie et Microbiologie (S828)
  • Instituts UMONS : Institut des Biosciences (Biosciences)
Texte intégral :

Abstract(s) :

(Anglais) Plastic debris are accumulating in the marine environment and aggregate microorganisms that form a new ecosystem called the plastisphere. Better understanding the plastisphere is crucial as it has self-sufficient organization and carries pathogens or organisms that may be involved in the pollutant adsorption and/or plastic degradation. To date, the plastisphere is mainly described at the taxonomic level and the functioning of its microbial communities still remains poorly documented. In this work, metagenomic and metaproteomic analyzes were performed on the plastisphere of polypropylene and polyethylene plastic debris sampled on a pebble beach from the Mediterranean Sea. Our results confirmed that the plastisphere was organized as self-sufficient ecosystems containing highly active primary producers, heterotrophs and predators such as nematode. Interestingly, the chemical composition of the polymer did not impact the structure of the microbial communities but rather influenced the functions expressed. Despite the fact that the presence of hydrocarbon-degrading bacteria was observed in the metagenomes, polymer degradation metabolisms were not detected at the protein level. Finally, hydrocarbon degrader (i.e., Alcanivorax) and pathogenic bacteria (i.e., Vibrionaceae) were observed in the plastispheres but were not very active as no proteins involved in polymer degradation or pathogeny were detected. This work brings new insights into the functioning of the microbial plastisphere developed on plastic marine debris.

Identifiants :
  • FNRS : FC 23347

Mots-clés :
  • (Anglais) Functional role
  • (Anglais) Plastic debris
  • (Anglais) Metagenome
  • (Anglais) Biofilm
  • (Anglais) Marine environment
  • (Anglais) Metaproteomic analysis