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Applied and Environmental Microbiology, February 2002, p. 1005-1009, Vol. 68, No. 2
0099-2240/02/$04.00+0     DOI: 10.1128/AEM.68.2.1005-1009.2002
Copyright © 2002, American Society for Microbiology. All Rights Reserved.

Tolerance and Metabolic Response of Acetogenic Bacteria toward Oxygen

Arno Karnholz, Kirsten Küsel, Anita Gößner, Andreas Schramm, and Harold L. Drake*

Department of Ecological Microbiology, BITOEK, University of Bayreuth, 95440 Bayreuth, Germany

Received 27 July 2001/ Accepted 13 November 2001

The acetogens Sporomusa silvacetica, Moorella thermoacetica, Clostridium magnum, Acetobacterium woodii, and Thermoanaerobacter kivui (i) grew in both semisolid and liquid cultivation media containing O2 and (ii) consumed small amounts of O2. Low concentrations of O2 caused a lag phase in growth but did not alter the ability of these acetogens to synthesize acetate via the acetyl coenzyme A pathway. Cell extracts of S. silvacetica, M. thermoacetica, and C. magnum contained peroxidase and NADH oxidase activities; catalase and superoxide dismutase activities were not detected.


* Corresponding author. Mailing address: Department of Ecological Microbiology, BITOEK, University of Bayreuth, 95440 Bayreuth, Germany. Phone: 49-0-921-555-640. Fax: 49-0-921-555-793. E-mail: harold.drake{at}bitoek.uni-bayreuth.de.


Applied and Environmental Microbiology, February 2002, p. 1005-1009, Vol. 68, No. 2
0099-2240/02/$04.00+0     DOI: 10.1128/AEM.68.2.1005-1009.2002
Copyright © 2002, American Society for Microbiology. All Rights Reserved.




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Copyright © 2002 by the American Society for Microbiology. All rights reserved.