GLBRC Populus Variovorax SynCom28

Community ID CommunityMech:000028

Ecological State ENGINEERED

Environment rhizosphere
ENVO:00005801

A defined, genome-resolved 28-strain synthetic community of Variovorax isolates from Populus deltoides and Populus trichocarpa roots. The community was used to identify strain-level partitioning between rhizosphere and endosphere compartments and genomic traits associated with endosphere specialization.

Taxonomy

Taxon	Ontology ID	Abundance
Variovorax sp. BK119	NCBITaxon:34072	N/A
Variovorax sp. BK151	NCBITaxon:34072	N/A
Variovorax sp. BK370	NCBITaxon:34072	N/A
Variovorax sp. BK460	NCBITaxon:34072	N/A
Variovorax sp. BK613	NCBITaxon:34072	N/A
Variovorax sp. BK658	NCBITaxon:34072	N/A
Variovorax sp. BT01	NCBITaxon:34072	N/A
Variovorax sp. CF079	NCBITaxon:34072	N/A
Variovorax sp. CF313	NCBITaxon:34072	N/A
Variovorax sp. GV004	NCBITaxon:34072	N/A
Variovorax sp. GV008	NCBITaxon:34072	N/A
Variovorax sp. GV014	NCBITaxon:34072	N/A
Variovorax sp. GV035	NCBITaxon:34072	N/A
Variovorax sp. GV040	NCBITaxon:34072	N/A
Variovorax sp. GV042	NCBITaxon:34072	N/A
Variovorax sp. GV051	NCBITaxon:34072	N/A
Variovorax sp. OK202	NCBITaxon:34072	N/A
Variovorax sp. OK212	NCBITaxon:34072	N/A
Variovorax sp. OK605	NCBITaxon:34072	N/A
Variovorax sp. OV084	NCBITaxon:34072	N/A
Variovorax sp. OV329	NCBITaxon:34072	N/A
Variovorax sp. OV700	NCBITaxon:34072	N/A
Variovorax sp. PDC80	NCBITaxon:34072	N/A
Variovorax sp. YR216	NCBITaxon:34072	N/A
Variovorax sp. YR266	NCBITaxon:34072	N/A
Variovorax sp. YR634	NCBITaxon:34072	N/A
Variovorax sp. YR750	NCBITaxon:34072	N/A
Variovorax sp. YR752	NCBITaxon:34072	N/A

Ecological Interactions

Taxon

Cross-feeding

Mutualism

Syntrophy

Competition

Commensalism

Rhizosphere-Endosphere Niche Partitioning

NICHE_PARTITIONING

Evidence

PMID:41543249 - SUPPORT (IN_VIVO)

"we use a defined, genome-resolved community of 28 Variovorax strains isolated from the roots of Populus deltoides and Populus trichocarpa (poplar trees) to determine which strains partition between rhizosphere and endosphere compartments"
PMID:41543249 - SUPPORT (IN_VIVO)

"dominant endosphere colonizers are enriched in genes related to nutrient metabolism, redox balance, transcriptional regulation, and a conserved L-fucose utilization pathway"

Intraspecific Metabolic Competition

STRAIN_COMPETITION

Evidence

PMID:41543249 - SUPPORT (IN_VIVO)

"These findings reveal that multiple ecological strategies, such as metabolic competition, regulatory adaptation, and niche specialization, can support endosphere colonization."
PMID:41543249 - SUPPORT (IN_VIVO)

"Not all strains succeed through the same strategy. Community-wide functional profiling revealed a distinct and reduced set of traits in the endosphere"

L-Fucose Pathway Colonization Enhancement

COLONIZATION_FACILITATION

Metabolites: L-fucose (CHEBI:2181)

Biological Processes:

root colonization (GO:0044409)

Evidence

PMID:41543249 - SUPPORT (IN_VIVO)

"a conserved L-fucose utilization pathway experimentally shown to enhance root colonization"
PMID:41543249 - SUPPORT (IN_VIVO)

"host filtering selects for distinct, and sometimes complementary, microbial strategies"

Associated Datasets

Dataset	Type	Repository	Accession
Primary publication mSystems article describing the 28-strain Variovorax Populus SynCom analysis.	OTHER	OTHER	doi:10.1128/msystems.01605-25
DefCom strain metadata table Supplementary Table S1 listing the 28 Variovorax strains and metadata.	OTHER	ZENODO	zenodo:17466836#Supp_table_1_strain_info.csv
Raw metagenomic reads Strain-resolved metagenomic sequencing reads for rhizosphere and endosphere colonization analyses.	METAGENOME	NCBI_BIOPROJECT	PRJNA1322484

Environmental Factors

Factor	Value	Unit
Endosphere selective pressure	host-filtered root endosphere	N/A
Compartment partitioning design	rhizosphere versus endosphere	N/A