Azoarcus

Azoarcus is a genus of nitrogen-fixing bacteria.^[1] 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 (inside the plant between the living cells) of some rice species and other grasses.^[2] The genus is within the family Zoogloeaceae in the Rhodocyclales of the Betaproteobacteria.^[3]

Azoarcus
Scientific classification
Domain:	Bacteria
Kingdom:	Pseudomonadati
Phylum:	Pseudomonadota
Class:	Betaproteobacteria
Order:	Rhodocyclales
Family:	Rhodocyclaceae
Genus:	Azoarcus Reinhold-Hurek et al. 1993
Type species
Azoarcus indigens
Species
Azoarcus anaerobius Azoarcus buckelii Azoarcus communis Azoarcus evansii Azoarcus indigens Azoarcus olearius Azoarcus toluclasticus Azoarcus tolulyticus Azoarcus toluvorans

Many studies reported this genus about its potential extracellular electron uptake metabolism and has been found in the cathodic part of many microbial fuel cells, notably in nitrate and oxygen reducing bio-cathodes biofilms.^[4][5][6]