Bacterial genome size and gene functional diversity negatively correlate with taxonomic diversity along a pH gradient.
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
17 11 2023
17 11 2023
Historique:
received:
06
06
2023
accepted:
06
11
2023
medline:
20
11
2023
pubmed:
18
11
2023
entrez:
18
11
2023
Statut:
epublish
Résumé
Bacterial gene repertoires reflect adaptive strategies, contribute to ecosystem functioning and are limited by genome size. However, gene functional diversity does not necessarily correlate with taxonomic diversity because average genome size may vary by community. Here, we analyse gene functional diversity (by shotgun metagenomics) and taxonomic diversity (by 16S rRNA gene amplicon sequencing) to investigate soil bacterial communities along a natural pH gradient in 12 tropical, subtropical, and temperate forests. We find that bacterial average genome size and gene functional diversity decrease, whereas taxonomic diversity increases, as soil pH rises from acid to neutral; as a result, bacterial taxonomic and functional diversity are negatively correlated. The gene repertoire of acid-adapted oligotrophs is enriched in functions of signal transduction, cell motility, secretion system, and degradation of complex compounds, while that of neutral pH-adapted copiotrophs is enriched in functions of energy metabolism and membrane transport. Our results indicate that a mismatch between taxonomic and functional diversity can arise when environmental factors (such as pH) select for adaptive strategies that affect genome size distributions.
Identifiants
pubmed: 37978289
doi: 10.1038/s41467-023-43297-w
pii: 10.1038/s41467-023-43297-w
pmc: PMC10656551
doi:
Substances chimiques
RNA, Ribosomal, 16S
0
Soil
0
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
7437Informations de copyright
© 2023. The Author(s).
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