| Derxia | |
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| Genus: | Derxia Jensen et al. 1960 [1] |
| Type species | |
| Derxia gummosa | |
| Species | |
Derxia is a genus of Gram-negative, nitrogen-fixing bacteria from the family of Alcaligenaceae. [3] [4] [5] [6]
Rhizobium is a genus of Gram-negative soil bacteria that fix nitrogen. Rhizobium species form an endosymbiotic nitrogen-fixing association with roots of (primarily) legumes and other flowering plants.
Frankia is a genus of nitrogen-fixing bacteria that live in symbiosis with actinorhizal plants, similar to the Rhizobium bacteria found in the root nodules of legumes in the family Fabaceae. Frankia also initiate the forming of root nodules.
Azotobacter is a genus of usually motile, oval or spherical bacteria that form thick-walled cysts and may produce large quantities of capsular slime. They are aerobic, free-living soil microbes that play an important role in the nitrogen cycle in nature, binding atmospheric nitrogen, which is inaccessible to plants, and releasing it in the form of ammonium ions into the soil. In addition to being a model organism for studying diazotrophs, it is used by humans for the production of biofertilizers, food additives, and some biopolymers. The first representative of the genus, Azotobacter chroococcum, was discovered and described in 1901 by Dutch microbiologist and botanist Martinus Beijerinck. Azotobacter species are Gram-negative bacteria found in neutral and alkaline soils, in water, and in association with some plants.
Bradyrhizobium is a genus of Gram-negative soil bacteria, many of which fix nitrogen. Nitrogen fixation is an important part of the nitrogen cycle. Plants cannot use atmospheric nitrogen (N2); they must use nitrogen compounds such as nitrates.
Azoarcus is a genus of nitrogen-fixing bacteria. Species in this genus are usually found in contaminated water, as they are involved in the degradation of some contaminants, commonly inhabiting soil. These bacteria have also been found growing in the endophytic compartment of some rice species and other grasses. The genus is within the family Zoogloeaceae in the Rhodocyclales of the Betaproteobacteria.
Azospira restricta is a species of nitrogen-fixing bacteria. It is a root bacteria and together with Azospira oryzae they are the two species in the genus. It is Gram-negative, non-spore-forming, with straight to curved rod-shaped cells with a single polar flagellum. The type strain is SUA2T.
Derxia gummosa is a Gram-negative, rod-shaped, nitrogen-fixing, obligate aerobe bacterium of the genus Derxia. Colonies of D. gummosa produce a tenacious gum.
Derxia lacustris is a Gram-negative, nitrogen-fixing, aerobic, motile bacterium of the genus Derxia, isolated from a freshwater lake in Taiwan.
Azospirillum doebereinerae is a species of nitrogen-fixing bacteria associated with the roots of Miscanthus species. Its type strain is GSF71T.
Azospirillum oryzae is a species of nitrogen-fixing bacteria associated with the roots of Oryza sativa. Its type strain is COC8T.
Beijerinckia derxii is a nitrogen fixing bacteria from the genus of Beijerinckia.
Beijerinckia mobilis is a nitrogen fixing bacteria from the genus of Beijerinckia.
Bradyrhizobium oligotrophicum is a nitrogen-fixing bacteria from the genus of Bradyrhizobium which was isolated from rice paddy soil in Miyagi Prefecture in Japan.
Pseudoxanthobacter is a genus of Gram-negative, rod-shaped, aerobic and nitrogen-fixing bacteria from the family Pseudoxanthobacteraceae.
Microvirga lupini is a nitrogen-fixing, Gram-negative, aerobic rod-shaped and non-spore-forming bacteria from the genus of Microvirga.
Microvirga vignae is a nitrogen-fixing bacteria from the genus of Microvirga which has been isolated from the Brazilian Semiarid region.
Microvirga zambiensis is a Gram-negative, nitrogen-fixing, rod-shaped and non-spore-forming bacteria from the genus of Microvirga.
Pleomorphomonas is a genus of bacteria from the order Hyphomicrobiales.
Sphingomonas azotifigens is a nitrogen-fixing bacteria from the genus of Sphingomonas which has been isolated from the root of a rice plant in Mishima in Japan.
Azospirillum is a Gram-negative, microaerophilic, non-fermentative and nitrogen-fixing bacterial genus from the family of Rhodospirillaceae. Azospirillum bacteria can promote plant growth.
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