Β-proteobacteria
| Betaproteobacteria | |
|---|---|
 |
|
| Colonies of Burkholderia pseudomallei, one of many pathogenic Betaproteobacteria. | |
| Scientific classification | |
| Domain: | Bacteria |
| Phylum: | Proteobacteria |
| Class: | Betaproteobacteria |
| Orders | |
|
Burkholderiales |
|
Burkholderiales
Hydrogenophilales
Methylophilales
Neisseriales
Nitrosomonadales
Procabacteriales
Rhodocyclales
Sulfuricellales
Betaproteobacteria are a class of gram-negative bacteria, and one of the five classes of the phylum Proteobacteria.
The Betaproteobacteria consist of over 75 genera and 220 species of bacteria. Together, the Betaproteobacteria represent a broad variety of metabolic strategies and occupy diverse environmental niches. Some Betaproteobacteria can derive energy from light, while others can use inorganic compounds to make energy. While many Betaproteobacteria are found in environmental soil and water, others are obligate pathogens and can cause disease in a variety of hosts. A number of Betaproteobacteria are economically important, and play roles in soil nitrification as well as wastewater treatment.
As with other classes of Proteobacteria, the Betaproteobacteria are metabolically very diverse. Some, such as Rhodocyclus can derive energy from sunlight. A number of others can use inorganic compounds to generate energy, such as the economically important members of the Nitrosomonadales which can perform nitrification.
Betaproteobacteria are one of the five classes that make up the phylum Proteobacteria. Betaproteobacteria are most closely related to the Gammaproteobacteria, and together they make up a taxon which has previously been called Chromatibacteria. Seven orders of Betaproteobacteria have been described: Burkholderiales, Hydrogenophilales, Methylophilales, Neisseriales, Nitrosomonadales, Rhodocyclales, and Sulfuricellales. The additional order Procabacteriales has been proposed to accommodate a group of bacterial endosymbionts of Acanthamoeba, however members of Procabacteriales cannot be grown in culture and have not been investigated sufficiently to recognize them as species.
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Wikipedia