- International Journal of Systematic and Evolutionary Microbiology
- Volume 49, Issue 2
f Thermaerobacter marianensis gen. nov., sp. nov., an aerobic extremely thermophilic marine bacterium from the 11000 m deep Mariana Trench
- Authors: Ken Takai, Akira Inoue, Koki Horikoshi
- Author for correspondence: Ken Takai. Tel: +81 468 67 3894. Fax: +81 468 66 6364. e-mail: firstname.lastname@example.org
- First Published Online: 01 April 1999, International Journal of Systematic and Evolutionary Microbiology 49: 619-628, doi: 10.1099/00207713-49-2-619
- Subject: New Taxa - Gram-Positive Bacteria
- Issue Published:
A novel extremely thermophilic bacterium was isolated from the world's deepest sea-floor, the Mariana Trench Challenger Deep at a depth of 10897 m. Cells were Gram-reaction variable, non-spore-forming and non-motile rods without flagella. Growth was observed between 50 and 80 °C (optimum: 74--76 °C; 90 min doubling time), pH 5.4 and 9.5 (optimum: pH 7.0-7.5) and 0.5 and 5% sea salts (optimum: 2% sea salts). The isolate was a strictly aerobic heterotroph capable of utilizing as sole energy and carbon source: yeast extract, peptone, cellulose, starch, chitin, casein, Casamino acids, a variety of sugars, carboxylic acids and amino acids. The G+C content of the genomic DNA was 72.5 mol%. Phylogenetic analysis based on 16S rRNA sequences placed this aerobic, high-G+C-content bacterium among the members of the Grampositive, low-G+C-content anaerobic thermophilic bacteria within the Bacillus-Clostridium subphylum. On the basis of the physiological and molecular properties of the new isolate, the name Thermaerobacter marianensis gen. nov., sp. nov. (type strain 7p75aT = JCM 10246T) is proposed.
The DDBJ accession number for the 16S rDNA sequence of 7p75aT is AB011495.
© 1999, International Union of Microbiological Societies | Published by the Microbiology Society
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