Ensifer fredii

Ensifer fredii is a nitrogen fixing bacterium.^[2] 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.^{[clarification needed]} Because of their ease of host infection there is interest in their genetics and the symbiotic role in host infection and nodule formation.^[3]

Ensifer fredii
Scientific classification
Domain:	Bacteria
Kingdom:	Pseudomonadati
Phylum:	Pseudomonadota
Class:	Alphaproteobacteria
Order:	Hyphomicrobiales
Family:	Rhizobiaceae
Genus:	Ensifer
Species:	E. fredii
Binomial name
Ensifer fredii (Scholla & Elkan, 1984) Young, 2003
Synonyms[1]
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

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).