A five-member thermophilic lignocellulose-degrading synthetic microbial community (SynCom) designed for manure composting, comprising the bacteria Bacillus cereus, Achromobacter sp., and Pseudomonas sp. together with the fungi Cladosporium sp. and Trichoderma harzianum. Inoculation drives a metabolic reprogramming from a biofilm-dependent defense-survival mode toward an active motility-metabolism mode (depleted lipopolysaccharide biosynthesis, enriched flagellar assembly), which restricts horizontal gene transfer opportunities. By intensifying thermophilic fermentation, lowering the carbon/nitrogen ratio, and enhancing humification, the SynCom attenuates antibiotic resistance genes and virulence factors, collapses high-risk ARG-mobilome interactomes, and achieves deep bio-sanitization by eliminating high-risk pathogens such as Pseudomonas aeruginosa.
Taxonomy
| Taxon | Ontology ID | Functional Roles | Abundance |
|---|---|---|---|
| Bacillus cereus | NCBITaxon:1396 · TaxonMech · TraitMech |
PRIMARY_DEGRADER
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N/A |
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| Achromobacter sp. — ontology label: Achromobacter | NCBITaxon:222 · TaxonMech · TraitMech |
PRIMARY_DEGRADER
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N/A |
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| Pseudomonas sp. — ontology label: Pseudomonas | NCBITaxon:286 · TaxonMech · TraitMech |
PRIMARY_DEGRADER
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N/A |
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| Cladosporium sp. — ontology label: Cladosporium | NCBITaxon:5498 · TaxonMech · TraitMech |
PRIMARY_DEGRADER
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N/A |
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| Trichoderma harzianum | NCBITaxon:5544 · TaxonMech · TraitMech |
PRIMARY_DEGRADER
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N/A |
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Ecological Interactions
The graph shows only explicitly linked interaction participants. Community members without an asserted participant link are omitted; membership alone does not imply an interaction.
SynCom-associated compost maturation
The five-member inoculum is reported to intensify thermophilic fermentation, lower the compost carbon/nitrogen ratio and increase humification. These are community-treatment and substrate outcomes, not evidence that all five inoculated members obtain reciprocal fitness benefits. The accessible abstract relates maturation to resistance-gene attenuation using Mantel correlation; it does not resolve individual-strain contributions or a uniquely demonstrated causal mediator.
Biological Processes:
- cellulose catabolic process (GO:0030245 · PathwayMech)
PARTIAL: intensified fermentation and the correlated C/N decrease and humification are proposed environmental contributors to later ARG and pathogen attenuation. Mantel association and the common inoculation treatment support this interpretation, not selective demonstration that maturation alone mediates elimination or prevents every gene-transfer event.
Evidence
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PMID:41839407 - SUPPORT (OTHER)"SynCom-driven rapid decrease in carbon/nitrogen ratio and enhanced humification"
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PMID:41839407 - PARTIAL (COMPUTATIONAL)"Mantel correlation analysis revealed"
Reported compost resistome and pathogen attenuation
The abstract reports a transient ARG rebound after SynCom inoculation followed by attenuation, reduced multidrug-resistance genes and virulence factors, and elimination of source-identified high-risk pathogens. Preserve this reported bio-sanitization result without equating metagenomic or network signals with demonstrated loss of every viable pathogen, universal fertilizer biosafety, or bilateral negative fitness effects. The accessible abstract does not resolve the viability-detection limits or provide a direct causal competition assay.
Evidence
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PMID:41839407 - SUPPORT (OTHER)"deep bio-sanitization was achieved by synchronously eliminating high-risk pathogens (e.g., Pseudomonas aeruginosa), phytopathogens, and specific virulence factors"
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PMID:41839407 - SUPPORT (COMPUTATIONAL)"Metagenomic analysis showed SynCom inoculation caused a transient ARG rebound followed by profound attenuation"
Metagenomic signatures of reduced HGT potential
KEGG and metagenomic analyses suggest a shift in functional potential from biofilm-associated defense toward motility/metabolism, with lower lipopolysaccharide biosynthesis and higher flagellar-assembly representation. The reported network change includes 26.6% fewer potential host-gene associations. PARTIAL: reduced HGT opportunity, recombinase suppression and physical restriction of transfer are source interpretations, not measurements of conjugation frequency, gene expression, actual cell motility or proven necessity of a particular route. Potential host-gene associations are not a count of observed horizontal-transfer events.
Biological Processes:
- horizontal gene transfer (GO:0009292 · PathwayMech)
Evidence
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PMID:41839407 - SUPPORT (COMPUTATIONAL)"a pivotal metabolic reprogramming from a biofilm-dependent defense-survival model to an active motility-metabolism mode, characterized by depleted lipopolysaccharide biosynthesis and enriched flagellar assembly"
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PMID:41839407 - SUPPORT (COMPUTATIONAL)"reducing potential host-gene associations by 26.6%"
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PMID:41839407 - PARTIAL (COMPUTATIONAL)"This metabolic shift implies a fitness cost trade-off that physically restricts horizontal gene transfer (HGT) opportunities"
Knowledge gaps & discussions (1)
KNOWLEDGE_GAP OPEN Which inferred compost mechanisms explain attenuation beyond metagenomic and correlation-based evidence?
The abstract describes treatment-associated chemistry, a transient ARG rebound, later attenuation, KEGG interpretation and potential host-gene networks. It does not resolve causal necessity or viable-pathogen detection limits. Full methods and direct functional evidence are needed to distinguish the proposed HGT restriction and environmental mediation from parallel responses to inoculation. This uncertainty does not erase the reported positive bio-sanitization outcome.
Attaches to: ecological_interactions#SynCom-associated compost maturation, ecological_interactions#Reported compost resistome and pathogen attenuation, ecological_interactions#Metagenomic signatures of reduced HGT potential
1 evidence item(s)
This metabolic shift implies a fitness cost trade-off that physically restricts horizontal gene transfer (HGT) opportunities
Growth Media
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