Name: Azotobacter Beijerinck 1901 (Approved Lists 1980)

Category: Genus

Proposed as: gen. nov.

Etymology: N.L. n. azotum, nitrogen; from French n. azote, nitrogen; from Gr. pref. a-, not; from Gr. n. zôê, life; from N.Gr. n. azôê, not sustaining life; N.L. masc. n. bacter, a rod; N.L. masc. n. Azotobacter, a nitrogen rod

Gender: masculine

Type species: Azotobacter chroococcum Beijerinck 1901 (Approved Lists 1980)

Conduct genome-based taxonomy of genus at TYGS

16S rRNA gene: Analyse FASTA

Original publication: Beijerinck MW. Über oligonitrophile Mikroben. Zentralblatt für Bakteriologie, Parasitenkunde, Infektionskrankheiten und Hygiene. Abteilung II 1901; 7:561-582.

IJSEM list: Skerman VBD, McGowan V, Sneath PHA. Approved lists of bacterial names. Int J Syst Bacteriol 1980; 30:225-420.

Nomenclatural status: validly published

Taxonomic status: correct name

• Notes:
  • Nomenclatural type of the family Azotobacteraceae Pribram 1933 (Approved Lists 1980). Publication: Pribram E. Klassification der Schizomyceten. F. Deuticke, Leipzig, 1933.
  • Breed et al. (1948) assigned this genus to the family "Azotobacteriaceae". Publication: Burkholder WH. Genus I. Pseudomonas Migula. Bacterial plant pathogens. In: Breed RS, Murray EGD, Hitchens AP (eds), Bergey's Manual of Determinative Bacteriology, 6th ed., The Williams & Wilkins Co, Baltimore, 1948, p. 82-150.
  • Garrity et al. (2003) assigned this genus to the family Azotobacteraceae Pribram 1933 (Approved Lists 1980). Publication: Garrity GM, Bell JA, Lilburn TG. Taxonomic Outline of the Procaryotes. Bergey's Manual of Systematic Bacteriology, Second Edition, Release 4.0. Springer-Verlag, New York, 2003.
  • Kluyver and Van Niel (1936) assigned this genus to the tribe Pseudomonadeae Kluyver and Van Niel 1936 (Approved Lists 1980). Publication: Kluyver AJ, Van Niel CB. Prospects for a natural system of classification of bacteria. Zentralblatt für Bakteriologie, Parasitenkunde, Infektionskrankheiten und Hygiene, Abteilung II 1936; 94:369-403.
  • Winslow et al. (1920) assigned this genus to the tribe "Azotobactereae". Publication: Winslow CE, Broadhurst J, Buchanan RE, Krumwiede C, Rogers LA, Smith GH. The Families and Genera of the Bacteria: Final Report of the Committee of the Society of American Bacteriologists on Characterization and Classification of Bacterial Types. J Bacteriol 1920; 5:191-229.
  • This taxon name is occasionally misprinted in some sources as: "Axotobacter"; "Azobacter".
  • This taxon name is occasionally used in plural form as: "Azotobacteria".
  • A consideration of the phenotypic determinative characteristics of the genera Azomonas Winogradsky 1938 (Approved Lists 1980) and Azotobacter Beijerinck 1901 (Approved Lists 1980) supports the synonymy of these genera as indicated by the sequence data. An investigation of these two genera, with a wider selection of strains, including the type species of Azomonas (Azomonas agilis), and perhaps based on other genes, might support their synonymy. If they are established as a single genus, Azotobacter would take priority over Azomonas. At the molecular level, the similarity of Azotobacter species housekeeping gene and 16S rRNA gene sequences with those of Pseudomonas, especially Pseudomonas aeruginosa (the type species of the genus), point to an intimate relationship between these taxa. Publication: Young JM, Park DC. Probable synonymy of the nitrogen-fixing genus Azotobacter and the genus Pseudomonas. Int J Syst Evol Microbiol 2007; 57:2894-2901.

Subdivision:

Number of child taxa with a validly published and correct name: 7
Number of child taxa with a validly published name, including synonyms: 9
Total number of child taxa: 12

• Child taxa:

  • Name	Nomenclatural status	Taxonomic status
    "Azotobacter agile" Beijerinck 1901	not validly published, basonym of name in Approved Lists
    Azotobacter armeniacus Thompson and Skerman 1981	validly published	correct name
    Azotobacter beijerinckii Lipman 1904 (Approved Lists 1980)	validly published	correct name
    Azotobacter bryophylli Liu et al. 2019	validly published	correct name
    Azotobacter chroococcum Beijerinck 1901 (Approved Lists 1980)	validly published	correct name
    "Azotobacter indicum" Starkey and De 1939	not validly published, basonym of name in Approved Lists
    "Azotobacter insigne" Derx 1951	not validly published, basonym of name in Approved Lists
    Azotobacter macrocytogenes Jensen 1955 (Approved Lists 1980)	validly published	synonym
    Azotobacter nigricans Krassilnikov 1949 (Approved Lists 1980)	validly published	correct name
    Azotobacter paspali Döbereiner 1966 (Approved Lists 1980)	validly published	synonym
    Azotobacter salinestris Page and Shivprasad 1991	validly published	correct name
    Azotobacter vinelandii Lipman 1903 (Approved Lists 1980)	validly published	correct name

Parent taxon: Pseudomonadaceae Winslow et al. 1917 (Approved Lists 1980)

Assigned by: Garrity GM, Bell JA, Lilburn T. Class III. Gammaproteobacteria class. nov. In: Brenner DJ, Krieg NR, Staley JT, Garrity GM (eds), Bergey's Manual of Systematic Bacteriology, 2nd edn, vol. 2 (The Proteobacteria), part B (The Gammaproteobacteria), Springer, New York, 2005, p. 1.

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