Phase-contrast micrograph of strain TGO(T) grown on pyruvate. The arrow indicates the start of spore formation. Bar = 5 microns. - Source:1Chemoautotroph/Mixotroph
Strictly anaerobic, thermophilic and syntrophic bacteria with rod shaped morphology in pure culture 1. The sole species of the genus Gelria glutamica is a strictly syntrophic, glutamate-degrading organism, which forms a syntrophic association with a hydrogenotrophic methanogen, Methanobacterium thermoautotrophicus 1. In co-culture, these bacteria can utilise glutamate, a-ketoglutarate, proline, casamino acids and a number of sugars under thermophilic conditions 1. Products of glutamate and proline oxidation are propionate, H2, NH4+ and CO2, while sugars are converted to acetate, propionate, CO2 and H2 1. Nothing is known about the genus' physiology in situ.
 Plugge, Balk, Zoetendal, Stams (2002): Gelria glutamica gen. nov., sp. nov., a thermophilic, obligately syntrophic, glutamate-degrading anaerobe. Int. J. Syst. Evol. Microbiol. 52(Pt 2): 401-7. doi:10.1099/00207713-52-2-401
 Mosbæk, Kjeldal, Mulat, Albertsen, Ward, Feilberg, et al. (2016): Identification of syntrophic acetate-oxidizing bacteria in anaerobic digesters by combined protein-based stable isotope probing and metagenomics. ISME J 10(10): 2405-18. doi:10.1038/ismej.2016.39