A defined coculture of Euglena gracilis and Chlorella pyrenoidosa optimized for biomass, lipid, and alpha-tocopherol production. The two phototrophs show complementary light-harvesting, carbon-fixation, electron-transport, and metabolite-secretion functions.
Taxonomy
| Taxon | Ontology ID | Functional Roles | Abundance |
|---|---|---|---|
| Euglena gracilis | NCBITaxon:3039 · TaxonMech · TraitMech |
PRIMARY_PRODUCER
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ABUNDANT |
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| Chlorella pyrenoidosa — ontology label: Auxenochlorella pyrenoidosa | NCBITaxon:3078 · TaxonMech · TraitMech |
PRIMARY_PRODUCER
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ABUNDANT |
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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.
Euglena Light Harvesting and Antioxidative Secretion
PARTIAL - the abstract assigns enhanced light harvesting and an antioxidative secretion profile to Euglena gracilis from multi-omics. This is an organism-associated profile, not by itself niche partitioning or evidence that alpha-tocopherol was exported by this member and taken up by its partner. The underlying assays and organism-specific flux resolution were not accessed.
Source Taxon: Euglena gracilis
Biological Processes:
- photosynthesis (GO:0015979 · PathwayMech)
Evidence
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PMID:42248260 - PARTIAL (COMPUTATIONAL)"EG primarily enhanced light-harvesting capacity and antioxidative metabolite secretion"
Chlorella Electron Transport and Lipid Metabolite Release
PARTIAL - the abstract assigns enhanced electron transport, carbon-fixation capacity and lipid-associated metabolite release to the Chlorella member. This profile does not establish which compounds were transferred to Euglena or whether either member is required for the other's growth. Publication naming is retained alongside the canonical Auxenochlorella pyrenoidosa taxon label.
Source Taxon: Chlorella pyrenoidosa
Metabolites: lipid (CHEBI:18059 · MediaIngredientMech · CMMMech)
Biological Processes:
- carbon fixation (GO:0015977 · PathwayMech)
- lipid biosynthetic process (GO:0008610 · PathwayMech)
Evidence
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PMID:42248260 - PARTIAL (COMPUTATIONAL)"CP intensified electron transport activity, enhanced carbon fixation capacity, and released lipid-associated metabolites"
Complementary Microalgal Metabolic Division of Labor
HYPOTHESIZED - the two reported functional profiles suggest complementary metabolism in the optimized coculture. This summary is not a separate experimental effect caused by listing its components, nor proof of resource partitioning, identified donor/recipient exchange or necessary biochemical cooperation.
Participating Taxa: Euglena gracilis, Chlorella pyrenoidosa
HYPOTHESIZED - complementary photosynthetic and metabolic capacities could contribute to the aggregate production gains. The abstract links profiles and output, but does not resolve their selective mediation or demonstrate reciprocal species fitness.
Evidence
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PMID:42248260 - PARTIAL (COMPUTATIONAL)"Multi-omics analysis revealed a clear metabolic division of labor"
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PMID:42248260 - PARTIAL (COMPUTATIONAL)"collectively driving process intensification in terms of biomass and lipid productivity"
Synergistic Biorefinery Production
The optimized 3:7 coculture in TAP medium showed higher total biomass, lipid productivity and alpha-tocopherol output than the monocultures, with a shorter reported logarithmic phase. These aggregate endpoints do not establish that both species benefit. Separate exogenous alpha-lipoic acid supplementation further improved output; it is not proof of endogenous cross-feeding or the same baseline condition.
Participating Taxa: Euglena gracilis, Chlorella pyrenoidosa
Metabolites: alpha-tocopherol (CHEBI:22470 · MediaIngredientMech · CMMMech)
Evidence
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PMID:42248260 - SUPPORT (IN_VITRO)"corresponding to 1.18-1.52-fold, 1.58-2.81-fold, and 2.13-9.90-fold increases relative to monoculture systems"
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PMID:42248260 - SUPPORT (IN_VITRO)"the logarithmic growth phase was reduced by 50% (3 days)"
Knowledge gaps & discussions (1)
KNOWLEDGE_GAP OPEN Which organism-specific transfers or physiological changes mediate the aggregate coculture outputs?
Remove the two profile-to-summary part/whole arrows; retain the complementarity-to-output arrow only as HYPOTHESIZED. Represent single-organism profiles as intrinsic source-only nodes, not self-edges. No alpha-tocopherol donor is assigned from the broad antioxidative profile. Total production does not demonstrate reciprocal fitness, and exogenous alpha-lipoic acid is not evidence of endogenous exchange. Primary abstract only: underlying Methods/Results and supplements were not acquired. Preserve NCBITaxon:3078 with its canonical Auxenochlorella label and the publication preferred name. Non-graph omics and protocol details remain #1443; no new microbial mechanism is inferred from the supplementation treatment.
Attaches to: ecological_interactions#Euglena Light Harvesting and Antioxidative Secretion, ecological_interactions#Chlorella Electron Transport and Lipid Metabolite Release, ecological_interactions#Complementary Microalgal Metabolic Division of Labor, ecological_interactions#Synergistic Biorefinery Production
External Resources
| Name | Repository | Resource ID |
|---|---|---|
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Primary publication - Euglena-Chlorella metabolic division of labor
Primary multi-omics study of the exact two-species microalgal coculture. |
OTHER | PMID:42248260 |
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Environmental Factors
| Factor | Value | Unit |
|---|---|---|
| Inoculation ratio | 3:7 | Euglena gracilis:Chlorella pyrenoidosa |
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| Coculture production endpoints | 1.23 g/L biomass; 163.7 mg/L/d lipid; 1976.28 micrograms/L alpha-tocopherol | N/A |
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| Alpha-lipoic acid supplementation | exogenous supplementation | N/A |
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Growth Media
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