Back Bacteris oxidants de l'hidrogen Catalan Vodíkové bakterie Czech Υδρογονοβακτήριο Greek Bacteria oxidante de hidrógeno Spanish 水素細菌 Japanese Bakterie wodorowe Polish Водородные бактерии Russian
Hydrogen-oxidizing bacteria are a group of facultative autotrophs that can use hydrogen as an electron donor. They can be divided into aerobes and anaerobes. The former use hydrogen as an electron donor and oxygen as an acceptor while the latter use sulphate or nitrogen dioxide as electron acceptors.[1] Species of both types have been isolated from a variety of environments, including fresh waters, sediments, soils, activated sludge, hot springs, hydrothermal vents and percolating water.[2]
These bacteria are able to exploit the special properties of molecular hydrogen (for instance redox potential and diffusion coefficient) thanks to the presence of hydrogenases.[3] The aerobic hydrogen-oxidizing bacteria are facultative autotrophs, but they can also have mixotrophic or completely heterotrophic growth. Most of them show greater growth on organic substrates. The use of hydrogen as an electron donor coupled with the ability to synthesize organic matter, through the reductive assimilation of CO2, characterize the hydrogen-oxidizing bacteria.
Among the most represented genera of these organisms are Caminibacter, Aquifex, Ralstonia and Paracoccus.
- ^ Aragno M, Schlegel HG (1981). "The Hydrogen-Oxidizing Bacteria". In Starr MP, Stolp H, Trüper HG, Balows A, Schlegel HG (eds.). The Prokaryotes. Berlin, Heidelberg: Springer. pp. 865–893. doi:10.1007/978-3-662-13187-9_70. ISBN 978-3-662-13187-9.
- ^ Koskinen PE, Beck SR, Orlygsson J, Puhakka JA (November 2008). "Ethanol and hydrogen production by two thermophilic, anaerobic bacteria isolated from Icelandic geothermal areas". Biotechnology and Bioengineering. 101 (4): 679–90. doi:10.1002/bit.21942. PMID 18500766. S2CID 24013743.
- ^ Barz M, Beimgraben C, Staller T, Germer F, Opitz F, Marquardt C, et al. (November 2010). "Distribution analysis of hydrogenases in surface waters of marine and freshwater environments". PLOS ONE. 5 (11): e13846. Bibcode:2010PLoSO...513846B. doi:10.1371/journal.pone.0013846. PMC 2974642. PMID 21079771.