Species Rhizobium fredii

Name: Rhizobium fredii Scholla and Elkan 1984

Category: Species

Proposed as: sp. nov.

Etymology: fre’di.i. N.L. gen. masc. n. fredii, of Fred, named after of E.B. Fred

Pronunciation (Latin), gender: r^hi-ZO-bi-um FRE-di-i, neuter

Type strain: ATCC 35423; CCUG 27877; DSM 5851; HAMBI 2075; ICMP 11139; IFO 14780; JCM 20967; LMG 6217; NBRC 14780; NRRL B-14241; NRRL B-14594; PRC 205; USDA 205

Conduct genome-based taxonomy at

16S rRNA gene: D14516 Analyse FASTA

Valid publication: Scholla MH, Elkan GH. Rhizobium fredii sp. nov., a fast-growing species that effectively nodulates soybeans. Int. J. Syst. Bacteriol. 1984; 34:484-486.

Nomenclatural status: validly published under the ICNP

Taxonomic status: synonym (and not recommended for medical use)

Correct name: Ensifer fredii (Scholla and Elkan 1984) Young 2003

Risk group: 1

Synonyms:

Name	Kind
Sinorhizobium xinjiangensis Chen et al. 1988	heterotypic synonym, inaccurate spelling
Sinorhizobium xinjiangense corrig. Chen et al. 1988	heterotypic synonym, validly published under the ICNP
Ensifer fredii (Scholla and Elkan 1984) Young 2003	homotypic synonym, validly published under the ICNP
Sinorhizobium fredii (Scholla and Elkan 1984) Chen et al. 1988	homotypic synonym, validly published under the ICNP
Ensifer xinjiangensis (Chen et al. 1988) Young 2003	heterotypic synonym, validly published under the ICNP

Notes:
- ⏰ According to Martens et al. (2008), this species is an earlier heterotypic synonym of Ensifer xinjiangensis (Chen et al. 1988) Young 2003. Publication: Martens M, Dawyndt P, Coopman R, Gillis M, De Vos P, Willems A. Advantages of multilocus sequence analysis for taxonomic studies: a case study using 10 housekeeping genes in the genus Ensifer (including former Sinorhizobium). Int J Syst Evol Microbiol 2008; 58:200-214. 🇧🇪
- ⏰ According to Martens et al. (2008), this species is an earlier heterotypic synonym of Sinorhizobium xinjiangense corrig. Chen et al. 1988. Publication: Martens M, Dawyndt P, Coopman R, Gillis M, De Vos P, Willems A. Advantages of multilocus sequence analysis for taxonomic studies: a case study using 10 housekeeping genes in the genus Ensifer (including former Sinorhizobium). Int J Syst Evol Microbiol 2008; 58:200-214. 🇧🇪
- ⏰ According to Martens et al. (2008), this species is an earlier heterotypic synonym of Sinorhizobium xinjiangensis Chen et al. 1988. Publication: Martens M, Dawyndt P, Coopman R, Gillis M, De Vos P, Willems A. Advantages of multilocus sequence analysis for taxonomic studies: a case study using 10 housekeeping genes in the genus Ensifer (including former Sinorhizobium). Int J Syst Evol Microbiol 2008; 58:200-214. 🇧🇪
- ❗ Rhizobium fredii is the correct name instead if this species is regarded as a separate species (i.e., if its nomenclatural type is not assigned to another species whose name is validly published, legitimate and not rejected and has priority) within a separate genus Rhizobium.
- 😷 The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 1, note = "Security sensitive biological agent: No - Terrestrial animal pathogen under Canadian Food Inspection Agency authority: No". — The risk group for Swiss Confederation has been imported on 2024-02-01. The full classification is: risk group = 1. — The risk group for Germany has been imported on 2026-08-13. The full classification is: risk group = 1. — If in doubt, use the risk group given in the regulations for your country and, if these are not available, use the risk group given in the catalogue of the culture collection from which you have obtained or intend to obtain the strain.
- 🎓 Name mentioned 85 times in PubMed until 2026-06-11.
- 🙅 This name is on the List of Recommended Names for bacteria of medical importance (LoRN) as a synonym of the name to be applied to this species. The name is on LoRN because of the recorded pathogenicity of other species in the genus.

Parent taxon: Rhizobium Frank 1889 (Approved Lists 1980)

Assigned by: Scholla MH, Elkan GH. Rhizobium fredii sp. nov., a fast-growing species that effectively nodulates soybeans. Int. J. Syst. Bacteriol. 1984; 34:484-486.

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Record number: 780361

This LPSN page was printed on 2026-09-10 03:31:53

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Species Rhizobium fredii