A defined two-member staged consortium, SYC, pairing the heterotrophic ammonia-oxidizing core strain Ensifer sp. S2-8-1 with an auxiliary Bacillus subtilis strain to convert cattle manure wastewater into a bioactive fermentation broth for maize growth promotion. The primary study compared an S2-8-1 monoculture, simultaneous co-culture, and the staged consortium, and reported that SYC had the best overall performance, enhanced rhizosphere nitrification, increased NO3--N availability, promoted maize growth, and increased whole-plant dry matter in a soil-maize pot experiment.
Taxonomy
| Taxon | Ontology ID | Functional Roles | Abundance |
|---|---|---|---|
| Ensifer sp. S2-8-1 — ontology label: Ensifer | NCBITaxon:106591 · TaxonMech · TraitMech | DOMINANT | |
|
|||
| Bacillus subtilis | NCBITaxon:1423 · TaxonMech · TraitMech | DOMINANT | |
|
|||
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.
Staged cattle-manure wastewater valorization
Among the tested S2-8-1 monoculture, simultaneous co-culture and staged SYC systems, SYC maintained the highest viable bacterial density. The source describes the resulting cattle-manure wastewater broth as stable and bioactive; this is bounded to the reported experiment, not demonstrated reciprocal benefit or universal functional stability.
Evidence
-
PMID:42341825 - SUPPORT (IN_VITRO)"Among them, SYC exhibited the best overall performance, maintaining the highest viable bacterial density"
-
PMID:42341825 - SUPPORT (IN_VITRO)"The staged "pre-modification followed by synergy" consortium effectively converts cattle manure wastewater into a stable and bioactive fermentation broth"
SYC rhizosphere nitrification and maize promotion
In a soil-maize pot experiment, SYC enhanced rhizosphere nitrification, nitrate availability, photosynthetic performance and cytokinin accumulation. Whole-plant dry matter increased by 41.4% versus the water control, not the monoculture or simultaneous-culture comparator used for broth density. The accessible abstract does not isolate cytokinin accumulation or the transcript response as the cause of plant growth.
Metabolites: nitrate (CHEBI:17632 · MediaIngredientMech · CMMMech)
Evidence
-
PMID:42341825 - SUPPORT (IN_VIVO)"SYC significantly enhanced rhizosphere nitrification, increased NO3--N availability, and promoted maize growth"
-
PMID:42341825 - SUPPORT (IN_VIVO)"resulting in a 41.4% increase in whole-plant dry matter compared with the water control"
-
PMID:42341825 - SUPPORT (IN_VIVO)"The consortium also improved photosynthetic performance and cytokinin accumulation."
S2-8-1 nitrogen and cytokinin-related gene upregulation
Comparative metatranscriptomics under SYC conditions found significant upregulation of S2-8-1 heterotrophic ammonia oxidation-related and cytokinin-related genes. This is a member-specific transcript observation, not demonstrated protein activity, metabolic flux, or a proven mediator of the broth-density or maize-growth outcomes.
Participating Taxa: Ensifer sp. S2-8-1
Evidence
-
PMID:42341825 - SUPPORT (IN_VITRO)"Comparative metatranscriptomic analysis revealed significant upregulation of heterotrophic ammonia oxidation-related genes (CYP450) and cytokinin-related genes (miaA and LOG) in S2-8-1 under SYC conditions"
Knowledge gaps & discussions (2)
KNOWLEDGE_GAP OPEN Which precise cattle-manure wastewater composition, pre-modification sequence, staging interval, inoculation ratio, temperature, and aeration conditions were used for the Ensifer sp. S2-8-1/Bacillus subtilis SYC consortium?
The PubMed abstract names the two strains, staged design, cattle manure wastewater feedstock, and day-12 outcome, but it does not expose the full staging or medium protocol needed to reproduce the fermentation.
Attaches to: growth_media#cattle manure wastewater, environmental_factors#staged consortium assembly
KNOWLEDGE_GAP OPEN Does the S2-8-1 transcript response causally mediate the separately reported broth and maize endpoints?
The accessible abstract reports comparative transcript abundance and suggests coordinated pathway activation. It does not isolate the transcript changes as causal mediators. Keep the observed endpoints separate, the transcript node scoped only to Ensifer, and no downstream arrows. Exact full-text methods were not read.
Attaches to: ecological_interactions#Staged cattle-manure wastewater valorization, ecological_interactions#SYC rhizosphere nitrification and maize promotion, ecological_interactions#S2-8-1 nitrogen and cytokinin-related gene upregulation
1 evidence item(s)
Comparative metatranscriptomic analysis revealed significant upregulation of heterotrophic ammonia oxidation-related genes (CYP450) and cytokinin-related genes (miaA and LOG) in S2-8-1 under SYC conditions
Supports reported transcript upregulation specifically in S2-8-1, not direct pathway activity or causal mediation of other endpoints.
External Resources
| Name | Repository | Resource ID |
|---|---|---|
|
Primary publication - staged SYC cattle manure wastewater consortium
Journal of Applied Microbiology 2026 primary article describing staged Ensifer sp. S2-8-1 plus Bacillus subtilis cultivation in cattle manure wastewater and maize pot testing. |
OTHER | PMID:42341825 |
|
||
Environmental Factors
| Factor | Value | Unit |
|---|---|---|
| staged consortium assembly | N/A | |
|
||
Growth Media
Cross-Mech Suite Links
Explore related entities across the CultureBotAI X-Mech knowledge bases: