Name: Azospira oryzae Reinhold-Hurek and Hurek 2000

Category: Species

Proposed as: sp. nov.

Etymology: o.ry’zae. L. gen. fem. n. oryzae, of rice, referring to its frequent occurrence in association with rice roots

Gender: feminine

Type strain: 6a3; DSM 21223; LMG 9096

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AF011347 Analyse FASTA

Valid publication: Reinhold-Hurek B, Hurek T. Reassessment of the taxonomic structure of the diazotrophic genus Azoarcus sensu lato and description of three new genera and new species, Azovibrio restrictus gen. nov., sp. nov., Azospira oryzae gen. nov., sp. nov. and Azonexus fungiphilus gen. nov., sp. nov. Int J Syst Evol Microbiol 2000; 50:649-659.

IJSEM list: Anonymous. Notification list. Notification that new names and new combinations have appeared in volume 50, part 2 of the IJSEM. Int J Syst Evol Microbiol 2000; 50:951-953.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

Risk group: 1

• Synonyms:

  • Name	Kind
    "Dechlorisoma suillus" Michaelidou et al. 2000	heterotypic synonym, not validly published
    Dechlorosoma suillum corrig. Achenbach et al. 2001	heterotypic synonym, validly published under the ICNP
    Dechloromonas suillum Achenbach et al. 2001	heterotypic synonym, inaccurate spelling

• Emendations:
  • Tan and Reinhold-Hurek 2003 Tan Z, Reinhold-Hurek B. Dechlorosoma suillum Achenbach et al. 2001 is a later subjective synonym of Azospira oryzae Reinhold-Hurek and Hurek 2000. Int J Syst Evol Microbiol 2003; 53:1139-1142. Euzeby JP. Notification list. Notification that new names and new combinations have appeared in volume 53, part 4 of the IJSEM. Int J Syst Evol Microbiol 2003; 53:1703-1705.
    Notes:
    • 🫂 Emendation accompanied by a proposal regarding the synonymy of the species.

• Notes:
  • 🥇 Nomenclatural type of the genus Azospira Reinhold-Hurek and Hurek 2000. Publication: Reinhold-Hurek B, Hurek T. Reassessment of the taxonomic structure of the diazotrophic genus Azoarcus sensu lato and description of three new genera and new species, Azovibrio restrictus gen. nov., sp. nov., Azospira oryzae gen. nov., sp. nov. and Azonexus fungiphilus gen. nov., sp. nov. Int J Syst Evol Microbiol 2000; 50:649-659.
  • ⏰ According to Tan and Reinhold-Hurek (2003), this species is an earlier heterotypic synonym of Dechloromonas suillum Achenbach et al. 2001. Publication: Tan Z, Reinhold-Hurek B. Dechlorosoma suillum Achenbach et al. 2001 is a later subjective synonym of Azospira oryzae Reinhold-Hurek and Hurek 2000. Int J Syst Evol Microbiol 2003; 53:1139-1142.
  • ⏰ According to Tan and Reinhold-Hurek (2003), this species is an earlier heterotypic synonym of Dechlorosoma suillum corrig. Achenbach et al. 2001. Publication: Tan Z, Reinhold-Hurek B. Dechlorosoma suillum Achenbach et al. 2001 is a later subjective synonym of Azospira oryzae Reinhold-Hurek and Hurek 2000. Int J Syst Evol Microbiol 2003; 53:1139-1142.
  • ⏰ According to Tan and Reinhold-Hurek (2003), this species is an earlier heterotypic synonym of "Dechlorisoma suillus" Michaelidou et al. 2000. Publication: Tan Z, Reinhold-Hurek B. Dechlorosoma suillum Achenbach et al. 2001 is a later subjective synonym of Azospira oryzae Reinhold-Hurek and Hurek 2000. Int J Syst Evol Microbiol 2003; 53:1139-1142.
  • 😷 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. — 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 20 times in PubMed until 2025-06-04.
  • 🧍 Azospira oryzae Reinhold-Hurek and Hurek 2000 was previously known as Azoarcus sp. group D. Publication: Reinhold-Hurek B, Hurek T, Gillis M, Hoste B, Vancanneyt M, Kersters K, De Ley J. Azoarcus gen. nov., nitrogen-fixing proteobacteria associated with roots of kallar grass (Leptochloa fusca (L.) Kunth) and description of two species, Azoarcus indigens sp. nov. and Azoarcus communis sp. nov. Int. J. Syst. Bacteriol. 1993; 43:574-584.

Parent taxon: Azospira Reinhold-Hurek and Hurek 2000

Assigned by: Reinhold-Hurek B, Hurek T. Reassessment of the taxonomic structure of the diazotrophic genus Azoarcus sensu lato and description of three new genera and new species, Azovibrio restrictus gen. nov., sp. nov., Azospira oryzae gen. nov., sp. nov. and Azonexus fungiphilus gen. nov., sp. nov. Int J Syst Evol Microbiol 2000; 50:649-659.

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Record number: 773589