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Applied and Environmental Microbiology, July 2003, p. 4282-4284, Vol. 69, No. 7
0099-2240/03/$08.00+0     DOI: 10.1128/AEM.69.7.4282-4284.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.

Motility of Colwellia psychrerythraea Strain 34H at Subzero Temperatures

Karen Junge,1* Hajo Eicken,2 and Jody W. Deming1

School of Oceanography and Astrobiology Program, University of Washington, Seattle, Washington,1 Geophysical Institute, University of Alaska Fairbanks, Fairbanks, Alaska2

Received 21 November 2002/ Accepted 1 May 2003

We examined the Arctic bacterium Colwellia psychrerythraea strain 34H for motility at temperatures from -1 to -15°C by using transmitted-light microscopy in a temperature-controlled laboratory. The results, showing motility to -10°C, indicate much lower temperatures to be permissive of motility than previously reported (5°C), with implications for microbial activity in frozen environments.

* Corresponding author. Mailing address: University of Washington, School of Oceanography, Box 357940, Seattle, WA 98195-7940. Phone: (206) 543-5093. Fax: (206) 543-0275. E-mail: kjunge{at}ocean.washington.edu.

Applied and Environmental Microbiology, July 2003, p. 4282-4284, Vol. 69, No. 7
0099-2240/03/$08.00+0     DOI: 10.1128/AEM.69.7.4282-4284.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.



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