The Rhodospirillales are an order of Pseudomonadota.
The Rhizobiaceae is a family of Pseudomonadota comprising multiple subgroups that enhance and hinder plant development. Some bacteria found in the family are used for plant nutrition and collectively make up the rhizobia. Other bacteria such as Agrobacterium tumefaciens and Rhizobium rhizogenes severely alter the development of plants in their ability to induce crown galls or hairy roots, respectively. The family has been of an interest to scientists for centuries in their ability to associate with plants and modify plant development. The Rhizobiaceae are, like all Pseudomonadota, Gram-negative. They are aerobic, and the cells are usually rod-shaped. Many species of the Rhizobiaceae are diazotrophs which are able to fix nitrogen and are symbiotic with plant roots.
Caulobacteraceae is a family of Pseudomonadota within the alpha subgroup. Like all Pseudomonadota, the Caulobacteraceae are gram-negative. Caulobacteraceae includes the genera Asticcacaulis, Brevundimonas, Phenylobacterium and Caulobacter.
Caulobacterales is an order of gram-negative pseudomonadota within the alpha subgroup.
The Rhodocyclaceae are a family of gram-negative bacteria. They are given their own order in the beta subgroup of Pseudomonadota, and include many genera previously assigned to the family Pseudomonadaceae.
The Rhodocyclales are an order of the class Betaproteobacteria in the phylum Pseudomonadota ("Proteobacteria"). Following a major reclassification of the class in 2017, the previously monofamilial order was split into three families:
The Comamonadaceae are a family of the Betaproteobacteria. Like all Pseudomonadota, they are Gram-negative. They are aerobic and most of the species are motile via flagella. The cells are curved rod-shaped.
The Brucellaceae are a family of the Gram-negative Hyphomicrobiales. They are named after Sir David Bruce, a Scottish microbiologist. They are aerobic chemoorganotrophes. The family comprises pathogen and soil bacteria
The Holosporaceae are a family of bacteria. The member Holospora is an intracellular parasite found in the unicellular protozoa Paramecium.
The Alteromonadales are an order of Pseudomonadota. Although they have been treated as a single family, the Alteromonadaceae, they were divided into eight by Ivanova et al. in 2004. The cells are straight or curved rods. They are motile by the use of a single flagellum. Most of the species are marine.
Zavarzinia compransoris is a Gram-negative soil bacterium that comprises the only current member of the genus Zavarzinia. It is named after the Russian microbiologist Georgi Alexandrovich Zavarzin. Zavarzinia is motile by using a polar flagellum. The cells are curved rod-shaped.
Aminobacter aminovorans is a Gram-negative soil bacteria.
Afipia carboxidovorans is a Gram-negative soil bacterium. It is aerobic, the cells are rod-shaped.
Devosia is a genus of Gram-negative soil bacteria. It is named after the Belgian microbiologist Paul De Vos. They are motile by flagella, the cells are rod-shaped.
Methylobacillus is a genus of Gram-negative methylotrophic bacteria. The cells are rod-shaped.
Burkholderia vietnamiensis is a species of bacteria. It can be found as an opportunistic pathogen in patients with cystic fibrosis or other immunocompromising illnesses. It differs from most Burkholderia species in that it is often susceptible to aminoglycosides, but not polymyxin B. Many isolates have been found to be catalase positive. B. vietnamiensis is able to fix N
2 and has been found to do so in symbiosis with wild poplar trees.
Ensifer is a genus of nitrogen-fixing bacteria (rhizobia), three of which have been sequenced.
In taxonomy, Ahrensia is a genus of the Hyphomicrobiales. Ahrensia is named after the German microbiologist R. Ahrens. The cells are rod-shaped and motile. They are strictly aerobic.
The Sphingomonadales are an order of the Alphaproteobacteria.
The Marinilabiliaceae are a family of bacteria.
