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Azorhizobium
Scientific classification
Domain:	Bacteria
Phylum:	Pseudomonadota
Class:	Alphaproteobacteria
Order:	Hyphomicrobiales
Family:	Xanthobacteraceae
Genus:	Azorhizobium Dreyfus et al. 1988
Type species
Azorhizobium caulinodans
Species
A. caulinodans Dreyfus et al. 1988 A. doebereinerae Moreira et al. 2006 A. oxalatiphilum Lang et al. 2013

Azorhizobium is a genus of Gram-negative soil bacteria. They fix nitrogen in symbiosis with plants in the genus Sesbania. Strain ORS571 of A. caulinodans has been fully sequenced.

Azorhizobium caulinodans ORS571 has exceptional properties because it is able to fix nitrogen in both aerobic free-living and symbiotic states

Azorhizobium caulinodans ORS571 is a rice and wheat endophyte, and does not need plant metabolites to make functional nitrogenase, but low nitrogenase expression is observed when it is living in cereal roots.

References

1. "List of Prokaryotic names with Standing in Nomenclature —Azorhizobium". Retrieved 2013-11-26.
2. Lee, K. B.; et al. (2008). "The genome of the versatile nitrogen fixer Azorhizobium caulinodans ORS571". BMC Genomics. 9 (4): 271. doi:10.1186/1471-2164-9-271. PMC 2443382. PMID 18522759.
3. ^ Ryu, Min-Hyung; Zhang, Jing; Toth, Tyler; Khokhani, Devanshi; Geddes, Barney A.; Mus, Florence; Garcia-Costas, Amaya; Peters, John W.; Poole, Philip S.; Ané, Jean-Michel; Voigt, Christopher A. (2020-07-06). "Control of nitrogen fixation in bacteria that associate with cereals". Nature Microbiology. 5 (2): 314–330. doi:10.1038/s41564-019-0631-2. ISSN 2058-5276. PMC 8634771. PMID 31844298. S2CID 209380949.

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