Thermomonas hydrothermalis sp. nov., A New Slightly Thermophilic γ-Proteobacterium Isolated from a Hot Spring in Central Portugal

✍ Scribed by Marta P. Alves; Fred A. Rainey; M. Fernanda Nobre; Milton S. da Costa

• Book ID: 114493565
• Publisher: Elsevier Science
• Year: 2003
• Tongue: German
• Weight: 246 KB
• Volume: 26
• Category: Article
• ISSN: 0723-2020
• DOI: 10.1078/072320203322337335

✦ Synopsis

Several non-pigmented bacterial isolates, with an optimum growth temperature of about 50 °C, were recovered from the hot spring at São Gemil in Central Portugal. Phylogenetic analyses of the 16S rRNA gene sequence of strain SGM-6 T indicated that this organism represents a new species of the γ-subclass of the Proteobacteria that is closely related to the newly described slightly thermophilic species Thermomonas haemolytica. The major fatty acids of strains SGM-6 T and SGM-7 are C15:0 iso, C16:0 iso, C11:0 iso and C11:0 iso 3OH. Ubiquinone 8 is the major respiratory quinone. The new isolates are strictly organotrophic and aerobic. Strain SGM-6 T only assimilated D-glucose, D-maltose, D-cellobiose, D-furanose, L-glutamate, L-glutamine, L-lysine, L-proline, L-ornithine, acetate, L-glutamic acid and pyruvate of sixty-five carbon sources tested. Strain SGM-7 also assimilates L-serine, but does not assimilate L-ornithine. On the basis of the phylogenetic analyses, physiological and biochemical characteristics, we propose that strains SGM-6 T and SGM-7 represent a new species most closely related to Thermomonas haemolytica for which we propose the name Thermomonas hydrothermalis.