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INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY logo

Volume 64, Issue Pt_5

gen. nov., sp. nov., an anaerobic carbohydrate-fermenting bacterium from anaerobic sludge Free

Abstract

An anaerobic, spore-forming, ethanol-hydrogen-coproducing bacterium, designated LX-B, was isolated from an anaerobic sludge treating herbicide wastewater. Cells of strain LX-B were non-motile rods (0.3–0.5×3.0–18.0 µm). Spores were terminal with a bulged sporangium. Growth occurred at 20–50 °C (optimum 37–45 °C), pH 5.0–8.0 (optimum pH 6.0–7.7) and 0–2.5 % (w/v) NaCl. The strain could grow fermentatively on glucose, maltose, arabinose, fructose, xylose, ribose, galactose, mannose, raffinose, sucrose, pectin, starch, glycerol, fumarate, tryptone and yeast extract. The major end-products of glucose fermentation were acetate, ethanol and hydrogen. Yeast extract was not required but stimulated growth. Nitrate, sulfate, thiosulfate, elemental sulfur, sulfite, anthraquinone-2,6-disulfonate, fumarate and Fe (III) nitrilotriacetate were not used as terminal electron acceptors. The G+C content of the genomic DNA was 56.1 mol%. The major cellular fatty acids were anteiso-C, iso-C and C. The most abundant polar lipids of strain LX-B were diphosphatidylglycerol and phosphatidylglycerol. 16S rRNA gene sequence analysis revealed that it belongs to an as-yet-unidentified taxon at the order- or class-level (OPB54) within the phylum , showing 86.5 % sequence similarity to previously described species of the cluster. The name gen. nov., sp. nov. is proposed to accommodate strain LX-B ( = DSM 25471 = JCM 18117 = CGMCC 1.5175) as the type strain.

  • Published Online:
Funding
This study was supported by the:
  • Taishan Scholar Program of Shandong Province
  • Knowledge Innovation Program of the Chinese Academy of Sciences (Award KG2D-EW-304-1 and KSCX2-YW-G-052)
  • National Natural Science Foundation of China (Award 51078344)
  • National Key Technology R&D Program (Award 2013BAD22B00)
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2014-05-01
2024-04-19
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Hydrogenispora ethanolica gen. nov., sp. nov., an anaerobic carbohydrate-fermenting bacterium from anaerobic sludge
Int J Syst Evol Microbiol 64, 1756 (2014); https://doi.org/10.1099/ijs.0.060186-0
/content/journal/ijsem/10.1099/ijs.0.060186-0
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