PMID: 10063Oct 1, 1976

Thermothrix thioparus gen. et sp. nov. a facultatively anaerobic facultative chemolithotroph living at neutral pH and high temperature

Canadian Journal of Microbiology
D E CaldwellJ P Laycock

Abstract

Thermothrix thioparus gen. et ep. nov. occurs naturally in a New Mexico hot spring at a temperature of 74 degrees C, a pH of 7.0, and a HS- concentration of 1 mg/litre. The organism is gram-negative, non-motile, 0.5-1.0 X 3-20 mum, and forms cell chains up to 1 cm in length. The resulting filaments do not possess a sheath. Sulfur is deposited extracellularly. The organism was isolated using an autotrophic medium with HS- as the energy source and NO3- as the terminal electron acceptor. Anaerobically either NO2- or NO3- is required, NO2- is formed from NO3-, and no observable gas is evolved. Oxygen can also be used as the terminal electron acceptor, but growth is poor because of the decreased solubility of O2 at temperatures required for growth. Alternate energy sources used aerobically and anaerobically include hexose, HS-, SO3-, and S2O3=. The temperature optimum is 70-73 degrees C and growth occurs from 62 to 77 degrees C. The organism's thermal and physiological characteristics are compared to those of Bacillus stearothermophilus, Methanobacterium thermoautotrophicum, Sulfolobus acidocalderius, Thermus aquaticus, Thermus flavus, as well as Thiobacillus denitrificans, the latter being the only other facultatively anaerobic che...Continue Reading

Citations

Jan 1, 1995·World Journal of Microbiology & Biotechnology·J K Kristjansson, G O Hreggvidsson
Jun 1, 1986·Microbial Ecology·B K PatelR M Daniel
Mar 1, 1988·Microbial Ecology·G J Macmichael
Oct 31, 2008·Applied Microbiology and Biotechnology·Chuan ChenDuu-Jong Lee
Jul 6, 2000·Applied and Environmental Microbiology·S SkirnisdottirJ K Kristjansson
Jan 22, 2008·Biochemistry. Biokhimii︠a︡·A V LebedinskyElizaveta A Bonch-Osmolovskaya
Jan 1, 1982·Antonie van Leeuwenhoek·M R Betlach
Apr 2, 2008·Annals of the New York Academy of Sciences·Isaac D Wagner, Juergen Wiegel
Sep 13, 1982·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·J G Kuenen, R F Beudeker
Jan 18, 2005·International Journal of Systematic and Evolutionary Microbiology·Hisako HirayamaKoki Horikoshi
Mar 27, 2003·International Journal of Systematic and Evolutionary Microbiology·Margarita L MiroshnichenkoElizaveta A Bonch-Osmolovskaya
Sep 18, 2003·International Journal of Systematic and Evolutionary Microbiology·Célia M ManaiaOlga C Nunes

Related Concepts

Aerobiosis
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Cell Wall
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