Network-directed efficient isolation of previously uncultivated Chloroflexi and related bacteria in hot spring microbial mats.
Journal
NPJ biofilms and microbiomes
ISSN: 2055-5008
Titre abrégé: NPJ Biofilms Microbiomes
Pays: United States
ID NLM: 101666944
Informations de publication
Date de publication:
29 04 2020
29 04 2020
Historique:
received:
10
10
2019
accepted:
07
04
2020
entrez:
1
5
2020
pubmed:
1
5
2020
medline:
23
3
2021
Statut:
epublish
Résumé
The perplexity of the complex multispecies community interactions is one of the many reasons why majority of the microorganisms are still uncultivated. We analyzed the entire co-occurrence networks between the OTUs of Tibet and Yunnan hot spring samples, and found that less abundant OTUs such as genus Tepidimonas (relative abundant <1%) had high-degree centricity (key nodes), while dominant OTUs particularly genus Chloroflexus (relative abundant, 13.9%) formed the peripheral vertexes. A preliminary growth-promotion assay determined that Tepidimonas sp. strain SYSU G00190W enhanced the growth of Chloroflexus sp. SYSU G00190R. Exploiting this result, an ameliorated isolation medium containing 10% spent-culture supernatant of Tepidimonas sp. strain SYSU G00190W was prepared for targeted isolation of Chloroflexi in the Tibet and Yunnan hot spring samples. 16S rRNA gene fingerprinting characterized majority of the colonies isolated from these media as previously uncultivated Chloroflexi, of which 36 are potential novel species (16S rRNA sequence identity <98.5%). Metabolomes studies indicated that the spent-culture supernatant comprises several low-molecular-weight organic substrates that can be utilized as potential nutrients for the growth of these bacteria. These findings suggested that limited knowledge on the interaction of microbes provide threshold to traditional isolation method.
Identifiants
pubmed: 32350263
doi: 10.1038/s41522-020-0131-4
pii: 10.1038/s41522-020-0131-4
pmc: PMC7190741
doi:
Substances chimiques
Culture Media
0
DNA, Bacterial
0
DNA, Ribosomal
0
RNA, Ribosomal, 16S
0
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
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