Name: Xanthomonas hortorum Vauterin et al. 1995

Category: Species

Proposed as: sp. nov.

Etymology: hor.to’rum. L. gen. masc. pl. n. hortorum, of gardens

Gender: feminine

Type strain: CFBP 5858; DSM 19143; ICMP 453; LMG 733; NCPPB 939; pv. Hederae

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: Y10759 Analyse FASTA

Valid publication: Vauterin L, Hoste B, Kersters K, Swings J. Reclassification of Xanthomonas. Int. J. Syst. Bacteriol. 1995; 45:472-489.

IJSEM list: Anonymous. Notification list. Notification that new names and new combinations have appeared in volume 45, part 3 of the IJSB. Int J Syst Bacteriol 1995; 45:881.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

Risk group: 1

• Synonyms:

  • Name	Kind
    Xanthomonas cynarae Trébaol et al. 2000	heterotypic synonym, validly published under the ICNP
    Xanthomonas gardneri (ex Šutič 1957) Jones et al. 2006	heterotypic synonym, validly published under the ICNP

• Emendations:
  • Morinière et al. 2020 Moriniere L, Burlet A, Rosenthal ER, Nesme X, Portier P, Bull CT, Lavire C, Fischer-Le Saux M, Bertolla F. Clarifying the taxonomy of the causal agent of bacterial leaf spot of lettuce through a polyphasic approach reveals that Xanthomonas cynarae Trebaol et al. 2000 emend. Timilsina et al. 2019 is a later heterotypic synonym of Xanthomonas hortorum Vauterin et al. 1995. Syst Appl Microbiol 2020; 43:126087. Oren A, Garrity GM. List of changes in taxonomic opinion no. 33. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2021; 71:2-3.
    Notes:
    • 🫂 Emendation accompanied by a proposal regarding the synonymy of the species.

• Notes:
  • ⏰ According to Moriniere et al. (2020), this species is an earlier heterotypic synonym of Xanthomonas cynarae Trébaol et al. 2000. Publication: Moriniere L, Burlet A, Rosenthal ER, Nesme X, Portier P, Bull CT, Lavire C, Fischer-Le Saux M, Bertolla F. Clarifying the taxonomy of the causal agent of bacterial leaf spot of lettuce through a polyphasic approach reveals that Xanthomonas cynarae Trebaol et al. 2000 emend. Timilsina et al. 2019 is a later heterotypic synonym of Xanthomonas hortorum Vauterin et al. 1995. Syst Appl Microbiol 2020; 43:126087.
  • 🏢 Synonymy of this taxon was mentioned in an IJSEM list. Publication: Oren A, Garrity GM. List of changes in taxonomic opinion no. 33. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2021; 71:2-3.
  • 😷 The risk group for Belgium has been imported on 2024-02-01. The full classification is: risk group = 1, note = "pv. taraxaci: 1 plant pathogen - biological class of risk plant: 2; pv. vitians: 1 plant pathogen - biological class of risk plant: 2". — The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 1, note = "Animal classification RG: 1 - Security sensitive biological agent: No - Terrestrial animal pathogen under Canadian Food Inspection Agency authority: No - Containment level: Containment Level 1". — The risk group for Swiss Confederation has been imported on 2024-02-01. The full classification is: risk group = 1, note = "PP". — The risk group for Germany has been imported on 2023-10-29. The full classification is: risk group = 1, note = "p".
  • 🎓 Name mentioned 42 times in PubMed until 2024-03-27.
  • 🧍 Plant pathogenic according to Bull et al. (2007). Publication: Bull CT, De Boer SH, Denny TP, Firrao G, Fischer Le Saux M, Saddler GS, Scortichini M, Stead DE, Takikawa Y. Comprehensive list of names of plant pathogenic bacteria, 1980-2007. Journal of Plant Pathology 2010; 92:551-592.

Parent taxon: Xanthomonas Dowson 1939 (Approved Lists 1980)

Assigned by: Vauterin L, Hoste B, Kersters K, Swings J. Reclassification of Xanthomonas. Int. J. Syst. Bacteriol. 1995; 45:472-489.

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Record number: 783137