The evolution of reduced facilitation in a four-species bacterial community.

Détails

Ressource 1Télécharger: 39677578_BIB_C0328ED5D1E4.pdf (1531.15 [Ko])
Etat: Public
Version: Final published version
Licence: CC BY-NC 4.0
ID Serval
serval:BIB_C0328ED5D1E4
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
The evolution of reduced facilitation in a four-species bacterial community.
Périodique
Evolution letters
Auteur⸱e⸱s
Piccardi P., Ulrich E., Garcia-Garcerà M., Martino R.D., Testa SEA, Mitri S.
ISSN
2056-3744 (Electronic)
ISSN-L
2056-3744
Statut éditorial
Publié
Date de publication
12/2024
Peer-reviewed
Oui
Volume
8
Numéro
6
Pages
828-840
Langue
anglais
Notes
Publication types: Journal Article
Publication Status: epublish
Résumé
Microbial evolution is typically studied in monocultures or in communities of competing species. But microbes do not always compete and how positive inter-species interactions drive evolution is less clear: Initially facilitative communities may either evolve increased mutualism, increased reliance on certain species according to the Black Queen Hypothesis (BQH), or weaker interactions and resource specialization. To distinguish between these outcomes, we evolved four species for 44 weeks either alone or together in a toxic pollutant. These species initially facilitated each other, promoting each other's survival and pollutant degradation. After evolution, two species (Microbacterium liquefaciens and Ochrobactrum anthropi) that initially relied fully on others to survive continued to do so, with no evidence for increased mutualism. Instead, Agrobacterium tumefaciens and Comamonas testosteroni (Ct) whose ancestors interacted positively, evolved in community to interact more neutrally and grew less well than when they had evolved alone, suggesting that the community limited their adaptation. We detected several gene loss events in Ct when evolving with others, but these events did not increase its reliance on other species, contrary to expectations under the BQH. We hypothesize instead that these gene loss events are a consequence of resource specialization. Finally, co-evolved communities degraded the pollutant worse than their ancestors. Together, our results support the evolution of weakened interactions and resource specialization, similar to what has been observed in competitive communities.
Mots-clé
Black Queen Hypothesis, bacterial community, community function, evolution, facilitation, specialization
Pubmed
Web of science
Open Access
Oui
Financement(s)
Université de Lausanne
Fonds national suisse
Création de la notice
19/08/2024 14:15
Dernière modification de la notice
21/01/2025 7:26
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