Name: Azorhizobium caulinodans Dreyfus et al. 1988

Category: Species

Proposed as: sp. nov.

Etymology: cau.li.no.dans. L. masc. n. caulis, the stalk or stem of a plant; L. pres. part. nodans, furnishing with knots, nodulating; N.L. part. adj. caulinodans, stem-nodulating

Gender: neuter

Type strain: ATCC 43989; CCUG 26647; DSM 5975; IFO 14845; JCM 20966; LMG 6465; NBRC 14845; ORS 571

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: D11342 Analyse FASTA

Valid publication: Dreyfus B, Garcia JL, Gillis M. Characterization of Azorhizobium caulinodans gen. nov., sp. nov., a stem-nodulating nitrogen-fixing bacterium isolated from Sesbania rostrata. Int. J. Syst. Bacteriol. 1988; 38:89-98.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

Risk group: 1

• Emendations:
  • Hördt et al. 2020 Hordt A, Lopez MG, Meier-Kolthoff JP, Schleuning M, Weinhold LM, Tindall BJ, Gronow S, Kyrpides NC, Woyke T, Goker M. Analysis of 1,000+ Type-Strain Genomes Substantially Improves Taxonomic Classification of Alphaproteobacteria. Front Microbiol 2020; 11:468. Oren A, Garrity GM. List of changes in taxonomic opinion no. 32. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2020; 70:4061-4090.

• Notes:
  • 🥇 Nomenclatural type of the genus Azorhizobium Dreyfus et al. 1988. Publication: Dreyfus B, Garcia JL, Gillis M. Characterization of Azorhizobium caulinodans gen. nov., sp. nov., a stem-nodulating nitrogen-fixing bacterium isolated from Sesbania rostrata. Int. J. Syst. Bacteriol. 1988; 38:89-98.
  • 😷 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 2023-10-29. The full classification is: risk group = 1.
  • 🎓 Name mentioned 223 times in PubMed until 2024-03-28.

Parent taxon: Azorhizobium Dreyfus et al. 1988

Assigned by: Dreyfus B, Garcia JL, Gillis M. Characterization of Azorhizobium caulinodans gen. nov., sp. nov., a stem-nodulating nitrogen-fixing bacterium isolated from Sesbania rostrata. Int. J. Syst. Bacteriol. 1988; 38:89-98.

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Record number: 773587