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Ensifer fredii
Scientific classification
Domain:	Bacteria
Phylum:	Pseudomonadota
Class:	Alphaproteobacteria
Order:	Hyphomicrobiales
Family:	Rhizobiaceae
Genus:	Ensifer
Species:	E. fredii
Binomial name
Ensifer fredii (Scholla & Elkan, 1984) Young, 2003
Synonyms
Ensifer xinjiangensis (Chen et al., 1988) Young, 2003 Rhizobium fredii Scholla and Elkan, 1984 Sinorhizobium fredii (Scholla and Elkan, 1984) Chen et al., 1988 emend. De Lajudie et al., 1994 Sinorhizobium xinjiangense Chen et al., 1988

Ensifer fredii is a nitrogen fixing bacterium. It is a fast-growing root nodule bacterium. Ensifer fredii exhibits a broad host-range and is able to nodulate both determinant hosts, such as soy, as well as indeterminate hosts including the pigeon pea. Because of their ease of host infection there is interest in their genetics and the symbiotic role in host infection and nodule formation.

History

Ensifer fredii was first isolated from soybeans. The type strain was isolated from a root nodule of Glycine max growing in Hunan Province, China, designated strain USDA 205 (= ATCC 35423 = PRC 205).

References

1. "Ensifer fredii". Integrated Taxonomic Information System. Retrieved 4 October 2021.
2. Scholla, M. H.; Elkan, G. H. (1984). "Rhizobium fredii sp. nov., a Fast-Growing Species That Effectively Nodulates Soybeans". International Journal of Systematic Bacteriology. 34 (4): 484–486. doi:10.1099/00207713-34-4-484. ISSN 0020-7713.
3. López-Baena, Francisco J.; Ruiz-Sainz, José E.; Rodríguez-Carvajal, Miguel A.; Vinardell, José M. (2016-05-18). "Bacterial Molecular Signals in the Sinorhizobium fredii-Soybean Symbiosis". International Journal of Molecular Sciences. 17 (5): 755. doi:10.3390/ijms17050755. PMC 4881576. PMID 27213334.

Further reading

• Forsberg LS, Reuhs BL (September 1997). "Structural characterization of the K antigens from Rhizobium fredii USDA257: evidence for a common structural motif, with strain-specific variation, in the capsular polysaccharides of Rhizobium spp". Journal of Bacteriology. 179 (17): 5366–71. doi:10.1128/jb.179.17.5366-5371.1997. PMC 179405. PMID 9286989.
• Sadowsky MJ, Cregan PB, Keyser HH (August 1988). "Nodulation and Nitrogen Fixation Efficacy of Rhizobium fredii with Phaseolus vulgaris Genotypes". Applied and Environmental Microbiology. 54 (8): 1907–10. doi:10.1128/AEM.54.8.1907-1910.1988. PMC 202777. PMID 16347705.
• Yamakawa, Takeo; Shirai, Teiko; Ishizuka, Junji (2000). "Effects of symbiosis with Rhizobium fredii on transport of fixed nitrogen in the xylem of soybean plants". Soil Science and Plant Nutrition. 46 (4): 885–892. doi:10.1080/00380768.2000.10409154. ISSN 0038-0768. S2CID 96900718.
• Weidner, S.; Becker, A.; Bonilla, I.; Jaenicke, S.; Lloret, J.; Margaret, I.; Puhler, A.; Ruiz-Sainz, J. E.; Schneiker-Bekel, S.; Szczepanowski, R.; Vinardell, J. M.; Zehner, S.; Gottfert, M. (2012). "Genome Sequence of the Soybean Symbiont Sinorhizobium fredii HH103". Journal of Bacteriology. 194 (6): 1617–1618. doi:10.1128/JB.06729-11. ISSN 0021-9193. PMC 3294874. PMID 22374952.
• Balatti PA, Pueppke SG (December 1990). "Cultivar-Specific Interactions of Soybean with Rhizobium fredii Are Regulated by the Genotype of the Root". Plant Physiology. 94 (4): 1907–9. doi:10.1104/pp.94.4.1907. PMC 1077472. PMID 16667934.

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• Bacteria described in 1994
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