Desulfotomaculum thermobenzoicum subsp. thermosyntrophicum subsp. nov., a thermophilic, syntrophic, propionate-oxidizing, spore-forming bacterium

International Journal of Systematic and Evolutionary Microbiology
Caroline M PluggeAlfons J M Stams

Abstract

From granular sludge from a laboratory-scale upflow anaerobic sludge bed reactor operated at 55 degrees C with a mixture of volatile fatty acids as feed, a novel anaerobic, moderately thermophilic, syntrophic, spore-forming bacterium, strain TPO, was enriched on propionate in co-culture with Methanobacterium thermoautotrophicum Z245. The axenic culture was obtained by using pyruvate as the sole source of carbon and energy. The cells were straight rods with pointed ends and became lens-shaped when sporulation started. The cells were slightly motile. The optimum growth temperature was 55 degrees C and growth was possible between 45 and 62 degrees C. The pH range for growth of strain TPO was 6-8, with an optimum at pH 7-7.5. Propionate was converted to acetate, CO2 and CH4 by a co-culture of strain TPO with Methanobacterium thermoautotrophicum Z245. In pure culture, strain TPO could grow fermentatively on benzoate, fumarate, H2/CO2, pyruvate and lactate. Sulphate could serve as inorganic electron acceptor when strain TPO was grown on propionate, lactate, pyruvate and H2/CO2. The G+C content was 53.7 mol%. Comparison of 16S rDNA sequences revealed that strain TPO is related to Desulfotomaculum thermobenzoicum (98%) and Desulfotomac...Continue Reading

Citations

Apr 6, 2006·Critical Reviews in Biotechnology·Jan SipmaAlfons J M Stams
Jun 29, 2014·Biochimica Et Biophysica Acta·Petra WormAlfons J M Stams
Apr 2, 2008·Annals of the New York Academy of Sciences·Isaac D Wagner, Juergen Wiegel
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Jul 13, 2007·International Journal of Systematic and Evolutionary Microbiology·Hiroyuki ImachiYuji Sekiguchi
Jul 16, 2010·International Journal of Microbiology·Sofiya N ParshinaAlfons J M Stams
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May 8, 2008·Nature Reviews. Microbiology·Gerard Muyzer, Alfons J M Stams
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May 12, 2020·Water Environment Research : a Research Publication of the Water Environment Federation·Bing GuoYang Liu

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