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INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY logo International Journal of Systematic and Evolutionary Microbiology

Volume 75, Issue 3

sp. nov., sp. nov. and sp. nov.: three members of group 1 Open Access

Abstract

Between 1976 and 2010, four bacterial isolates were collected in New South Wales and Queensland, Australia, and stored as part of routine biosecurity surveillance. Recently, these historic isolates were analysed as part of a larger project to enhance the taxonomic accuracy of our culture collection and improve Australia’s biosecurity preparedness. Three isolates were collected from , initially identified as sp., and one from , identified as subsp. . In this study, we employed modern phenotypic and genomic techniques to further characterize these isolates. Matrix-assisted laser desorption ionization–time of flight MS biotyping and Biolog GEN III MicroPlates confirmed that they are members of the genus but did not allow for species-level classification. Genome-relatedness indices and phylogenetic analysis confirmed that they were and revealed that they represent three novel species. The maximum average nucleotide identity and digital DNA–DNA hybridization values observed when comparing the four isolates to all type strains and each other were 93.9% and 50.7%, respectively. Pathogenesis assays confirmed that two of the isolates are not pathogenic to , the plant from which they were isolated. Based on these findings, we propose the names sp. nov. (DAR 80977=ICMP 24943), sp. nov. (DAR 35659=ICMP 24942) and sp. nov. (DAR 34887=ICMP 24940).

  • Received:
  • Accepted:
  • Published Online:
Keyword(s): bioinformatics , biosecurity , nonpathogenic , phylogenetics and Xanthomonas
Funding
This study was supported by the:
  • Grains Research and Development Corporation (Award 9177866)
    • Principal Award Recipient: ToniAnn Chapman
  • Australian Research Council (Award LP180100593)
    • Principal Award Recipient: DanielJ E McKnight
© 2025 Crown Copyright
  • This is an open-access article distributed under the terms of the Creative Commons Attribution License.
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2025-03-10
2026-02-17

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Xanthomonas bundabergensis sp. nov., Xanthomonas medicagonis sp. nov. and Xanthomonas tesorieronis sp. nov.: three members of group 1 Xanthomonas
Int J Syst Evol Microbiol 75, 006686 (2025); https://doi.org/10.1099/ijsem.0.006686
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