A defined mangrove cyanobacterium-bacterium coculture pairing Leptolyngbya lignicola with the associated bacterium Pseudomonas monteilii, both isolated from mangrove waters of Bhitarkanika, Odisha, India. Dash et al. used axenic L. lignicola comparisons, morphology, biochemical assays, scanning electron microscopy, pigment and biomass measurements, and metabolite profiling to show a close physical association, a faster and higher co-culture biomass peak, and Pseudomonas-linked production of indole-3-acetic acid, indole-3-butyric acid, vitamin B12, and siderophores.
Taxonomy
| Taxon | Ontology ID | Functional Roles | Abundance |
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| Leptolyngbya lignicola | NCBITaxon:1940730 · TaxonMech · TraitMech |
PRIMARY_PRODUCER
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DOMINANT |
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| Pseudomonas monteilii | NCBITaxon:76759 · TaxonMech · TraitMech | 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.
Pseudomonas-Associated Leptolyngbya Growth Promotion
The primary abstract reports a coculture biomass maximum of 298.19 mg/L on day 6 versus 198.08 mg/L on day 9 for axenic Leptolyngbya lignicola, with greater pigment and biochemical accumulation. These are maxima on different days, not a matched-time comparison. Pseudomonas monteilii produced IAA, IBA, vitamin B12 and siderophores, but metabolite production does not establish transfer or selective mediation of growth. Full Methods were unavailable, so the biomass measurement cannot be assumed to resolve each partner separately.
Source Taxon: Pseudomonas monteilii
Target Taxon: Leptolyngbya lignicola
Metabolites: indole-3-acetic acid (CHEBI:16411 · MediaIngredientMech · CMMMech), vitamin B12 (CHEBI:176843 · MediaIngredientMech · CMMMech), siderophore (CHEBI:26672 · MediaIngredientMech · CMMMech)
Biological Processes:
- biological process involved in interspecies interaction between organisms (GO:0044419 · PathwayMech)
Evidence
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PMID:42573630 - SUPPORT (IN_VITRO)"significantly exceeding that of axenic L. lignicola"
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PMID:42573630 - PARTIAL (IN_VITRO)"Metabolite profiling revealed the production of several growth-promoting compounds by P. monteilii"
Pseudomonas Physical Association With Leptolyngbya
Morphological, biochemical and scanning electron microscopic analyses in the primary abstract support close physical association between Leptolyngbya lignicola and Pseudomonas monteilii. Association is not a selective test that contact is required for growth promotion, nor proof of metabolite transfer or reciprocal benefit. No physical-association-to-growth arrow is inferred.
Source Taxon: Pseudomonas monteilii
Target Taxon: Leptolyngbya lignicola
Evidence
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PMID:42573630 - SUPPORT (IN_VITRO)"confirmed a close physical association between the two partners"
Knowledge gaps & discussions (2)
KNOWLEDGE_GAP OPEN Recover the exact co-culture medium, inoculum densities, temperature, light regime, and time-series sampling conditions from the article body when full text becomes inspectable.
The cached PubMed abstract establishes the partner identities, mangrove origin, physical association, biomass advantage, and P. monteilii metabolite profile, but it does not report the cultivation recipe or quantitative inoculation details.
Attaches to: growth_media#Leptolyngbya-Pseudomonas
1 evidence item(s)
co-culture achieved a maximum biomass of 298.19
Shows that cultivation outcomes were reported even though exact setup details were not available in the abstract cache.
KNOWLEDGE_GAP OPEN Which partner contributes to the biomass measurement, and which processes mediate the reported growth response?
Retain both observations and zero arrows. The complete primary abstract and subscription-preview boundary were read, not the full paper, original images or supplements. Compare day6 coculture and day9 axenic maxima, not matched-time measurements. Metabolite production and physical association do not establish transfer, contact necessity or reciprocal benefit. Earlier #1154/#1155 fixes remain intact. The existing exact-growth-conditions discussion remains open; #1559 tracks separate metadata/source limits. No new mechanistic structure or paid research submission.
Attaches to: ecological_interactions#Pseudomonas-Associated Leptolyngbya Growth Promotion, ecological_interactions#Pseudomonas Physical Association With Leptolyngbya
External Resources
| Name | Repository | Resource ID |
|---|---|---|
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Primary article - Leptolyngbya and Pseudomonas mangrove growth-promotion coculture
Archives of Microbiology article reporting synergistic growth promotion of mangrove-isolated L. lignicola by P. monteilii. |
OTHER | doi:10.1007/s00203-026-05109-9 |
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Environmental Factors
| Factor | Value | Unit |
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| Bhitarkanika mangrove-water source | Bhitarkanika, Odisha, India | N/A |
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| Pseudomonas growth-promoting metabolite profile | N/A | |
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