Sugars dominate the seagrass rhizosphere.
Journal
Nature ecology & evolution
ISSN: 2397-334X
Titre abrégé: Nat Ecol Evol
Pays: England
ID NLM: 101698577
Informations de publication
Date de publication:
07 2022
07 2022
Historique:
received:
20
12
2021
accepted:
21
03
2022
pubmed:
3
5
2022
medline:
12
7
2022
entrez:
2
5
2022
Statut:
ppublish
Résumé
Seagrasses are among the most efficient sinks of carbon dioxide on Earth. While carbon sequestration in terrestrial plants is linked to the microorganisms living in their soils, the interactions of seagrasses with their rhizospheres are poorly understood. Here, we show that the seagrass, Posidonia oceanica excretes sugars, mainly sucrose, into its rhizosphere. These sugars accumulate to µM concentrations-nearly 80 times higher than previously observed in marine environments. This finding is unexpected as sugars are readily consumed by microorganisms. Our experiments indicated that under low oxygen conditions, phenolic compounds from P. oceanica inhibited microbial consumption of sucrose. Analyses of the rhizosphere community revealed that many microbes had the genes for degrading sucrose but these were only expressed by a few taxa that also expressed genes for degrading phenolics. Given that we observed high sucrose concentrations underneath three other species of marine plants, we predict that the presence of plant-produced phenolics under low oxygen conditions allows the accumulation of labile molecules across aquatic rhizospheres.
Identifiants
pubmed: 35501482
doi: 10.1038/s41559-022-01740-z
pii: 10.1038/s41559-022-01740-z
pmc: PMC9262712
doi:
Substances chimiques
Sugars
0
Sucrose
57-50-1
Oxygen
S88TT14065
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
866-877Commentaires et corrections
Type : CommentIn
Informations de copyright
© 2022. The Author(s).
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