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Soybean N-Fixation Simplified SynCom

Ecological State ENGINEERED
Environment rhizosphere
ENVO:00005801
Source File Soybean_N_Fixation_sfSynCom.yaml

A simplified synthetic community (sfSynCom) for enhanced symbiotic nitrogen fixation in soybean, based on core-helper strain interactions. The consortium consists of Bradyrhizobium elkanii BXYD3 as the core nitrogen-fixing symbiont and two Pantoea helper strains. The helper strains produce acyl homoserine lactones (AHL) that enhance colonization and infection of soybean roots by B. elkanii through quorum sensing, significantly improving nodulation and nitrogen fixation compared to single-strain inoculation.

Taxonomy

Taxon Ontology ID Functional Roles Abundance
Bradyrhizobium elkanii BXYD3 NCBITaxon:29448
PRIMARY_PRODUCER
DOMINANT
Pantoea sp. helper strain 1 NCBITaxon:53335
SYNTROPHIC_PARTNER
COMMON
Pantoea sp. helper strain 2 NCBITaxon:53335
SYNTROPHIC_PARTNER
COMMON
Glycine max NCBITaxon:3847
PRIMARY_PRODUCER
N/A

Ecological Interactions

AHL Quorum Sensing Signal Production

MUTUALISM

Source Taxon: Pantoea sp. helper strain 1

Metabolites: N-acyl-L-homoserine lactone (CHEBI:48850)

Biological Processes:

Downstream Effects:
→ Enhanced Root Colonization and Nodulation

Evidence

  • PMID:40052412 - SUPPORT (IN_VITRO)
    "Two of these helper strains assigned to the Pantoea taxon produce acyl homoserine lactones, which significantly enhanced the colonization and infection of soybean by BXYD3"

Enhanced Root Colonization and Nodulation

MUTUALISM

Source Taxon: Bradyrhizobium elkanii BXYD3

Metabolites: dinitrogen (CHEBI:17997), ammonia (CHEBI:16134)

Biological Processes:

Evidence

  • PMID:40052412 - SUPPORT (IN_VITRO)
    "This sfSynCom based on the core-helper strategy was more effective at promoting nodulation than inoculation with BXYD3 alone and achieved effects comparable to those of a complex elite SynCom previously constructed on the basis of potential beneficial functions between microbes and plants alone"

Environmental Factors

Factor Value Unit
Quorum sensing regulation AHL-mediated N/A
Nodulation efficiency enhanced N/A
Agricultural application sustainable nitrogen input N/A