- International Journal of Systematic and Evolutionary Microbiology
- Volume 45, Issue 3
f Isolation and Characterization of a Novel Alkalitolerant Thermophile, Anaerobranca horikoshii gen. nov., sp. nov.
- Authors: MARCELLA ENGLE, YOUHONG LI, CARL WOESE, JUERGEN WIEGEL*
- * Corresponding author. Phone: (706) 542-2651. Fax: (706) 542-2674. Electronic mail address: email@example.com.
- Int J Syst Evol Microbiol, July 1995 45: 454-461, doi: 10.1099/00207713-45-3-454
- Subject: Original Papers Relating To Systematic Bacteriology
- Published Online:
Nine moderately alkalitolerant thermophilic bacteria with similar properties were isolated from water and soil samples obtained from Yellowstone National Park. These Gram-type-positive, rod-shaped bacteria produce cells with primary branches. The cells are peritrichous and exhibit only slight tumbling motility. At 60°C the pH range for growth is 6.9 to 10.3, and the optimum pH is 8.5. At pH 8.5 the temperature range for growth is 34 to 66°C, with an optimum temperature of 57°C. The strains are mainly proteolytic. The fermentation products from yeast extract are acetate, CO2, and H2. Fumarate added to minimal medium containing yeast extract is stoichiometrically converted to succinate, indicating that it is used as an alternative electron acceptor. The DNA G+C content is 33 to 34 mol%. On the basis of its unique properties, such as branch formation, growth at alkaline pH values at elevated temperatures, and the relative distance of its 16S rRNA sequence from those of other known bacteria, we propose that strain JW/YL-138T (T = type strain) and eight similar strains represent a new genus and species, Anaerobranca horikoshii. Strain JW/YL-138 is designated the type strain of the type species, A. horikoshii, which was named in honor of Koki Horikoshi, a pioneer in the field of alkaliphilic bacteria.
Copyright © 1995 International Union of Microbiological Societies | Published by the Microbiology Society
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