A defined yeast consortium model for early solid-state fermentation of Sichuan Shai vinegar. Zhu et al. 2026 compared four key yeast species by co-culturing, metabolomics, and simulated fermentation, then identified Pichia kudriavzevii, Kazachstania humilis, and Brettanomyces bruxellensis as a triple consortium with optimal synergy for total acid, acetic acid, and characteristic flavor-profile formation.
Taxonomy
| Taxon | Ontology ID | Functional Roles | Abundance |
|---|---|---|---|
| Saccharomyces cerevisiae | NCBITaxon:4932 · TaxonMech · TraitMech |
SECONDARY_FERMENTER
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N/A |
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| Pichia kudriavzevii | NCBITaxon:4909 · TaxonMech · TraitMech |
SECONDARY_FERMENTER
|
N/A |
|
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| Kazachstania humilis — ontology label: Maudiozyma humilis | NCBITaxon:51915 · TaxonMech · TraitMech |
SECONDARY_FERMENTER
|
N/A |
|
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| Brettanomyces bruxellensis | NCBITaxon:5007 · TaxonMech · TraitMech |
SECONDARY_FERMENTER
|
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.
Saccharomyces ethanol provisioning for ester synthesis
CROSS_FEEDINGThe study reports S. cerevisiae-derived ethanol as a precursor for ester synthesis by other yeasts in the four-species comparison panel. The listed participants delimit that panel, not proof of transfer to every named member. S. cerevisiae was not a member of the separately selected three-yeast combination.
Participating Taxa: Saccharomyces cerevisiae, Pichia kudriavzevii, Kazachstania humilis, Brettanomyces bruxellensis
Metabolites: ethanol (CHEBI:16236 · MediaIngredientMech · CMMMech)
Biological Processes:
- fermentation (GO:0006113 · PathwayMech)
PARTIAL: reported ethanol provisioning supplies a substrate for ester synthesis, which was dominated by P. kudriavzevii in the comparison panel. The abstract does not isolate a specific S. cerevisiae-to-P. kudriavzevii transfer or establish this route in the selected trio, which excludes S. cerevisiae.
Evidence
-
PMID:41344775 - SUPPORT (IN_VITRO)"Saccharomyces cerevisiae produced ethanol, which served as a precursor for ester synthesis by other yeasts."
Pichia-dominated ester synthesis
P. kudriavzevii dominated ester synthesis in the defined yeast co-culture comparison.
Participating Taxa: Pichia kudriavzevii
Evidence
-
PMID:41344775 - SUPPORT (IN_VITRO)"Pichia kudriavzevii dominated ester synthesis"
Brettanomyces characteristic flavor production
B. bruxellensis primarily produced characteristic flavor compounds including acetaldehyde and 4-ethylguaiacol.
Participating Taxa: Brettanomyces bruxellensis
Metabolites: 4-ethylguaiacol (CHEBI:179252 · MediaIngredientMech · CMMMech)
Evidence
-
PMID:41344775 - SUPPORT (IN_VITRO)"Brettanomyces bruxellensis primarily produced characteristic flavor compounds (e.g., acetaldehyde, 4-ethylguaiacol)"
Kazachstania-driven acidification
K. humilis efficiently produced acids and accelerated acidification.
Participating Taxa: Kazachstania humilis
Evidence
-
PMID:41344775 - SUPPORT (IN_VITRO)"Kazachstania humilis efficiently produced acids accelerating acidification"
Three-Yeast Acid and Flavor Comparison Outcome
Within the tested early-fermentation comparisons, the P. kudriavzevii, K. humilis and B. bruxellensis combination had the reported peak total-acid and acetic-acid contents and enhanced characteristic flavor profiles. This is a configuration-level outcome, not a universal optimum or proof of reduced competition. Untargeted metabolomics implicated pyruvate-associated pathways without tracing pyruvate exchange or establishing pathway causation.
Participating Taxa: Pichia kudriavzevii, Kazachstania humilis, Brettanomyces bruxellensis
Metabolites: acetic acid (CHEBI:15366 · MediaIngredientMech · CMMMech), pyruvate (CHEBI:15361 · MediaIngredientMech · CMMMech)
Evidence
-
PMID:41344775 - SUPPORT (IN_VITRO)"Pichia kudriavzevii, Kazachstania humilis, and Brettanomyces bruxellensis exhibited optimal synergy, achieving peak total acid"
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PMID:41344775 - SUPPORT (IN_VITRO)"significantly enhancing characteristic flavor profiles"
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PMID:41344775 - PARTIAL (IN_VITRO)"this combination efficiently regulated multiple flavor biosynthesis pathways through pyruvate-mediated metabolic hubs"
Knowledge gaps & discussions (2)
KNOWLEDGE_GAP OPEN Which strain accessions, inoculation ratios, solid-state matrix, and incubation parameters were used for the P. kudriavzevii / K. humilis / B. bruxellensis Sichuan Shai vinegar consortium?
The PubMed abstract names the yeast species, the optimized triple consortium, and the major flavor outputs, but not enough methods detail to reproduce the simulated solid-state fermentation.
Attaches to: taxonomy#Pichia kudriavzevii, taxonomy#Kazachstania humilis, taxonomy#Brettanomyces bruxellensis, growth_media#simulated Sichuan Shai vinegar solid-state fermentation
KNOWLEDGE_GAP OPEN Which tested configurations resolve ethanol recipient identity and individual contributions to the reported three-yeast outcome?
The primary abstract and committed abstract were checked. It reports precursor use and distinct production roles, but neither reduced competition nor isolated contributions to the joint endpoint. The selected trio excludes the ethanol donor. The publisher request returned 403; bounded exact-title/DOI searches did not yield an independently verified complete article. Configuration-specific primary results would resolve attribution; the existing methods discussion remains separate.
Attaches to: ecological_interactions#Saccharomyces ethanol provisioning for ester synthesis, ecological_interactions#Pichia-dominated ester synthesis, ecological_interactions#Brettanomyces characteristic flavor production, ecological_interactions#Kazachstania-driven acidification, ecological_interactions#Three-Yeast Acid and Flavor Comparison Outcome
1 evidence item(s)
Saccharomyces cerevisiae produced ethanol, which served as a precursor for ester synthesis by other yeasts.
Supports ethanol supply by S. cerevisiae as an input to ester synthesis by partner yeasts.
External Resources
| Name | Repository | Resource ID |
|---|---|---|
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PubMed - Sichuan Shai vinegar yeast SynCom
PubMed record for the Food Microbiology article describing the defined yeast consortia for Sichuan Shai vinegar flavor formation. |
OTHER | PMID:41344775 |
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DOI - Sichuan Shai vinegar yeast SynCom
DOI for the Food Microbiology article describing the defined yeast consortia for Sichuan Shai vinegar flavor formation. |
OTHER | doi:10.1016/j.fm.2025.104983 |
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Growth Media
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