Identification of enriched hyperthermophilic microbial communities from a deep-sea hydrothermal vent chimney under electrolithoautotrophic culture conditions - Ecole Centrale de Marseille Accéder directement au contenu
Article Dans Une Revue Scientific Reports Année : 2021

Identification of enriched hyperthermophilic microbial communities from a deep-sea hydrothermal vent chimney under electrolithoautotrophic culture conditions

Résumé

Abstract Deep-sea hydrothermal vents are extreme and complex ecosystems based on a trophic chain. We are still unsure of the identities of the first colonizers of these environments and their metabolism, but they are thought to be (hyper)thermophilic autotrophs. Here we investigate whether the electric potential observed across hydrothermal chimneys could serve as an energy source for these first colonizers. Experiments were performed in a two-chamber microbial electrochemical system inoculated with deep-sea hydrothermal chimney samples, with a cathode as sole electron donor, CO 2 as sole carbon source, and nitrate, sulfate, or oxygen as electron acceptors. After a few days of culturing, all three experiments showed growth of electrotrophic biofilms consuming the electrons (directly or indirectly) and producing organic compounds including acetate, glycerol, and pyruvate. Within the biofilms, the only known autotroph species retrieved were members of Archaeoglobales . Various heterotrophic phyla also grew through trophic interactions, with Thermococcales growing in all three experiments as well as other bacterial groups specific to each electron acceptor. This electrotrophic metabolism as energy source driving initial microbial colonization of conductive hydrothermal chimneys is discussed.
Fichier principal
Vignette du fichier
s41598-021-94135-2.pdf (4.05 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-03427430 , version 1 (09-12-2021)

Licence

Paternité

Identifiants

Citer

Guillaume Pillot, Oulfat Amin Ali, Sylvain Davidson, Laetitia Shintu, Anne Godfroy, et al.. Identification of enriched hyperthermophilic microbial communities from a deep-sea hydrothermal vent chimney under electrolithoautotrophic culture conditions. Scientific Reports, 2021, 11 (1), ⟨10.1038/s41598-021-94135-2⟩. ⟨hal-03427430⟩
119 Consultations
61 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More