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Appl Environ Microbiol. 1988 August; 54(8): 2049-2053
Copyright © 1988, American Society for Microbiology. All Rights Reserved.

Properties of Thermus ruber Strains Isolated from Icelandic Hot Springs and DNA:DNA Homology of Thermus ruber and Thermus aquaticus

¹ Microbial Technology Laboratory, PHLS Centre for Applied Microbiology and Research, Porton Down, Salisbury SP4 OJG, and Biochemistry Department, London Hospital Medical College, London E1 2AD,² United Kingdom

ABSTRACT

Seventeen pink-pigmented strains of the genus Thermus were isolated from samples collected from thermal areas of Iceland. The strains were examined by using phenotypic characterization and DNA:DNA homology and were compared with recognized strains. Visually, the strains could be divided into three groups based on their pigmentation; however, spectroscopic studies of the pigments indicated little difference among them. Most strains required a vitamin supplement for growth and used fructose, maltose, mannose, or sucrose as the sole carbon source. In the presence of nitrate, two strains were able to grow under anaerobic conditions. The optimum growth temperature was 60°C; growth did not occur at 30 or 70°C.

^* Corresponding author.

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