Table 1. Classification and general features of Rhizobium leguminosarum bv. trifolii strain WSM597 according to the MIGS recommendations [8].

MIGS ID	Property	Term	Evidence code
	Current classification	Domain Bacteria	TAS [9]
		Phylum Proteobacteria	TAS [10]
		Class Alphaproteobacteria	TAS [11,12]
		Order Rhizobiales	TAS [12,13]
		Family Rhizobiaceae	TAS [14,15]
		Genus Rhizobium	TAS [14,16-19]
		Species Rhizobium leguminosarum bv. trifolii	IDA [14,16,19,20]
	Gram stain	Negative	IDA
	Cell shape	Rod	IDA
	Motility	Motile	IDA
	Sporulation	Non-sporulating	NAS
	Temperature range	Mesophile	NAS
	Optimum temperature	28°C	NAS
MIGS-22	Oxygen requirement	Aerobic	NAS
	Carbon source	Varied	IDA
	Energy source	Chemoorganotroph	NAS
MIGS-6	Habitat	Soil, root nodule on host	IDA
MIGS-15	Biotic relationship	Free living, symbiotic	IDA
MIGS-14	Pathogenicity	Non-pathogenic	NAS
	Biosafety level	1	TAS [21]
	Isolation	Legume root nodule	IDA
MIGS-4	Geographic location	Tacuarembó, Uruguay	IDA
MIGS-5	Nodule collection date	1999	IDA
MIGS-4.1	Longitude	-56	IDA
MIGS-4.2	Latitude	-31.41
MIGS-4.3	Depth	5 cm soil depth
MIGS-4.4	Altitude	130 m

Evidence codes – IDA: Inferred from Direct Assay (i.e. first time published); TAS: Traceable Author Statement (i.e., a direct report exists in the literature) NAS: Non-traceable Author Statement (i.e., not directly observed for the living, isolated sample, but based on a generally accepted property for the species, or anecdotal evidence). These evidence codes are from the Gene Ontology project [22].