Strong chemotaxis by marine bacteria towards polysaccharides is enhanced by the abundant organosulfur compound DMSP.
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
06 Dec 2023
06 Dec 2023
Historique:
received:
13
02
2023
accepted:
01
11
2023
medline:
11
12
2023
pubmed:
7
12
2023
entrez:
6
12
2023
Statut:
epublish
Résumé
The ability of marine bacteria to direct their movement in response to chemical gradients influences inter-species interactions, nutrient turnover, and ecosystem productivity. While many bacteria are chemotactic towards small metabolites, marine organic matter is predominantly composed of large molecules and polymers. Yet, the signalling role of these large molecules is largely unknown. Using in situ and laboratory-based chemotaxis assays, we show that marine bacteria are strongly attracted to the abundant algal polysaccharides laminarin and alginate. Unexpectedly, these polysaccharides elicited stronger chemoattraction than their oligo- and monosaccharide constituents. Furthermore, chemotaxis towards laminarin was strongly enhanced by dimethylsulfoniopropionate (DMSP), another ubiquitous algal-derived metabolite. Our results indicate that DMSP acts as a methyl donor for marine bacteria, increasing their gradient detection capacity and facilitating their access to polysaccharide patches. We demonstrate that marine bacteria are capable of strong chemotaxis towards large soluble polysaccharides and uncover a new ecological role for DMSP in enhancing this attraction. These navigation behaviours may contribute to the rapid turnover of polymers in the ocean, with important consequences for marine carbon cycling.
Identifiants
pubmed: 38057294
doi: 10.1038/s41467-023-43143-z
pii: 10.1038/s41467-023-43143-z
pmc: PMC10700628
doi:
Substances chimiques
dimethylpropiothetin
C884XA7QGG
Sulfur Compounds
0
Sulfonium Compounds
0
Polysaccharides
0
Polymers
0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
8080Subventions
Organisme : Department of Education and Training | Australian Research Council (ARC)
ID : FT210100100
Organisme : EC | EU Framework Programme for Research and Innovation H2020 | H2020 Priority Excellent Science | H2020 European Research Council (H2020 Excellent Science - European Research Council)
ID : ERC-2018-ADG #834162
Informations de copyright
© 2023. The Author(s).
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