Geoalkalibacter

Abstract

Ge.o.al.ka.li.bac.ter. Gr. fem. n. gê , earth; Arabic article al , the; Arabic masc. n. qaly , ashes of saltwort; N.L. neut. n. alkali , alkali (indeclinable); N.L. masc. n. bacter , rod; N.L. masc. n. Geoalkalibacter , a rod from alkaline earth. Desulfobacterota / Desulfuromonadia / Desulfuromonadales / Geoalkalibacteraceae / Geoalkalibacter The genus Geoalkalibacter is represented by Gram‐negative non‐spore‐forming rods. Cells of most species of the genus are motile by means of laterally or polarly located flagella. Members of the genus are strictly anaerobic, alkalitolerant or obligately alkaliphilic, and halotolerant or moderately halophilic mesophiles. They grow by anaerobic respiration with Fe(III), Mn(IV), or sulfur compounds as an electron acceptor. Molecular hydrogen, organic acids, alcohols, peptides, and Fe(II)‐containing minerals can serve as electron donors. All members of the genus are electroactive microorganisms that use extracellular electron transfer (EET) to achieve respiratory processes with insoluble electron acceptors. Some of these bacteria are capable of atmospheric nitrogen fixation. The known habitats are haloalkaline soda lakes and subsurface oil reservoirs. The genus Geoalkalibacter contains two species with validly published names and belongs to the phylum Desulfobacterota , class Desulfuromonadia, order Desulfuromonadales , and family Geoalkalibacteraceae . DNA G + C content (mol%) : 57.05–60.57 (genome analysis). Type species : Geoalkalibacter ferrihydriticus Zavarzina et al. 2006, VL115.