Xanthobacteraceae

Xanthobacteraceae
Scientific classification Edit this classification
Domain: Bacteria
Phylum: Pseudomonadota
Class: Alphaproteobacteria
Order: Hyphomicrobiales
Family: Xanthobacteraceae
Lee et al. 2005
Genera[1]
Synonyms
  • "Labriaceae" Beck et al. 2015[2]

The Xanthobacteraceae are a family of bacteria that includes Azorhizobium, a genus of rhizobia. Xanthobacteraceae bacteria are diverse and Gram-negative, rod-shaped, and may be motile or non-motile depending on the specific bacteria. Their cells range in size from 0.4–1.0 × 0.8–6 μm,[3] but when grown in the presence of alcohol as the sole carbon source, they can reach up to 10 μm in length. These bacteria do not form spores and have opaque, slimy colonies that appear slightly yellow due to the presence of zeaxanthin dirhamnoside.[4]

The genus Xanthobacter was established in 1978 by Wiegel et al. based on numerical taxonomic comparisons of microorganisms that were then classified in the genus Corynebacterium. In 2005, Lee et al. proposed the family Xanthobacteraceae based on a comparison of 16S rRNA of the members of Alphaproteobacteria. The family includes five genera, namely Xanthobacter, Azorhizobium, Ancylobacter, Labrys, and Starkeya.[4]

  1. ^ Euzéby JP, Parte AC. "Xanthobacteraceae". List of Prokaryotic names with Standing in Nomenclature (LPSN). Retrieved May 15, 2021.
  2. ^ Beck, D. A. C.; McTaggart, T. L.; Setboonsarng, U.; Vorobev, A.; Goodwin, L.; Shapiro, N.; Woyke, T.; Kalyuzhnaya, M. G.; Lidstrom, M. E.; Chistoserdova, L. (2015). "Multiphyletic origins of methylotrophy in Alphaproteobacteria, exemplified by comparative genomics of Lake Washington isolates". Environmental Microbiology. 17 (3): 547–54. Bibcode:2015EnvMi..17..547B. doi:10.1111/1462-2920.12736. PMID 25683159.
  3. ^ Wiegel JK (2015). "Xanthobacter". Bergey's Manual of Systematics of Archaea and Bacteria. American Cancer Society. pp. 1–22. doi:10.1002/9781118960608.gbm00829. ISBN 978-1-118-96060-8.
  4. ^ a b Oren A (2014). "The Family Xanthobacteraceae". In Rosenberg E, DeLong EF, Lory S, Stackebrandt E (eds.). The Prokaryotes: Alphaproteobacteria and Betaproteobacteria. Berlin, Heidelberg: Springer. pp. 709–726. doi:10.1007/978-3-642-30197-1_258. ISBN 978-3-642-30197-1.