Martinus Willem Beijerinck was a Dutch microbiologist and botanist who was one of the founders of virology and environmental microbiology. He is credited with the discovery of viruses, which he called "contagium vivum fluidum".
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.
The Beijerinckiaceae are a family of Hyphomicrobiales named after the Dutch microbiologist Martinus Willem Beijerinck. Beijerinckia is a genus of free-living aerobic nitrogen-fixing bacteria. Acidotolerant Beijerinckiaceae has been shown to be the main bacterial methanol sink in a deciduous forest soil and highlights their importance for the conversion of methanol in forest soils.
Desulfotomaculum is a genus of Gram-positive, obligately anaerobic soil bacteria. A type of sulfate-reducing bacteria, Desulfotomaculum can cause food spoilage in poorly processed canned foods. Their presence can be identified by the release of hydrogen sulfide gas with its rotten egg smell when the can is first opened. They are endospore-forming bacteria.
Anaerobacter is a genus of Gram-positive bacteria related to Clostridium. They are anaerobic chemotrophs and are unusual spore-formers as they produce more than one spore per bacterial cell. They fix nitrogen. Their G+C content is 29%. Only one species of this genus has been described.
The Nitrobacteraceae are a family of gram-negative, aerobic bacteria. They include plant-associated bacteria such as Bradyrhizobium, a genus of rhizobia associated with some legumes. It also contains animal-associated bacteria such as Afipia felis, formerly thought to cause cat-scratch disease. Others are free-living, such as Rhodopseudomonas, a purple bacterium found in marine water and soils. The strain Rhodopseudomonas palustris DX-1 can generate an electric current with no hydrogen production, a trait being explored in the development of the microbial fuel cell. The genus Afipia has also been found in the atmosphere, where it uses methylsulfonylmethane as a carbon source.
Azoarcus communis is a species of bacteria. It is a nitrogen-fixing bacteria. Its cells are yellow-pigmented, straight to curved, gram-negative rods. Its type strain is LMG 5514.
Azoarcus olearius is a species of bacteria. It is a nitrogen-fixing bacteria. Its cells are Gram-negative, motile and rod-shaped, surrounded by a thin capsule. Its type strain is DQS-4T.
Derxia is a genus of Gram-negative, nitrogen-fixing bacteria from the family of Alcaligenaceae.
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.
Microvirgula aerodenitrificans is a species of bacteria, the only species in its genus. It is a Gram-negative, catalase-and oxidase-positive, curved rod-shaped and motile denitrifier. It is aerobic as well as an anoxic heterotroph, having an atypical respiratory type of metabolism in which oxygen and nitrogen oxides are used simultaneously as terminal electron acceptors. SGLY2T is its type strain.
Beijerinckia derxii is a nitrogen fixing strain of bacteria from the genus of Beijerinckia.
Beijerinckia doebereinerae is a bacterium from the genus of Beijerinckia.
Beijerinckia mobilis is a nitrogen fixing bacteria from the genus of Beijerinckia.
Ensifer americanus is a bacterium first isolated from root nodules of Acacia species native of Mexico. Its type strain is CFNEI 156.
Bradyrhizobium oligotrophicum is a nitrogen-fixing bacteria from the genus of Bradyrhizobium which was isolated from rice paddy soil in Miyagi Prefecture in Japan.
Rhodomicrobium is a microaerobic to anaerobic, purple non-sulfur, cluster-building genus of bacteria. Rhodomicrobium uses bacteriochlorophyll a and bacteriochlorophyll b for photosynthesis and occurs in fresh- and sea-water and in soil
Microvirga lupini is a nitrogen-fixing, Gram-negative, aerobic rod-shaped and non-spore-forming bacteria from the genus of Microvirga.
Microvirga zambiensis is a Gram-negative, nitrogen-fixing, rod-shaped and non-spore-forming bacteria from the genus of Microvirga.
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.
