Abstract
AbstractHy.dro.ge.ni.spo'ra. N.L. neut. n.hydrogenum, hydrogen; from Gr. neut. n. hydôr, water; from Gr. ind. v. gennaô, to produce; Gr. fem. n.spora, a seed, and, in biology, a sporeHydrogenispora, a spore‐forming, hydrogen‐producing bacterium.Bacillota / unnamed Class / Order OPB54 / HydrogenisporaLong thin rods, nonmotile. Terminal spores with a bulging sporangium. Strictly anaerobic, chemoorganoheterotroph. Grows at 20–50°C (optimum of 37–45°C), pH 5.0–8.0 (optimum of pH 6.0–7.7), and 0–2.5% (w/v) NaCl. Fermentative growth with a range of carbohydrates, glycerol, fumarate, tryptone, and yeast extract. Major fermentation products from glucose include acetate, ethanol, and hydrogen. Represented by a single strain, namely the type strain LX‐BTof the type speciesHydrogenispora ethanolica, isolated from anaerobic sludge treating herbicide wastewater. The genome ofH. ethanolicaLX‐BTis 6.0 Mb in length, has a G + C content of 54.1 mol%, and contains 5,243 putative protein encoding and 71 RNA genes. Shares at most 90% 16S rRNA gene sequence similarity with other described species. Most closely affiliated with uncultured members of clade OPB54 in the Greengenes taxonomy, within the phylumBacillota.DNA G + C content (mol%): 54.1% (genome sequence).Type species:Hydrogenispora ethanolicaLiu et al. 2014VP.