2015/02/27 by Brian P. Hedlund, Anna‐Louise Reysenbach, Liuquin Huang +9 · 1 citation
Environmental Science · Biochemistry, Genetics and Molecular Biology · #Microbial Community Ecology and Physiology #Genomics and Phylogenetic Studies #Methane Hydrates and Related Phenomena
paper · pdf · doi:10.3389/fmicb.2015.00157
openalex publication_date 2015/02/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
The order Aquificales (phylum Aquificae) consists of thermophilic and hyperthermophilic bacteria that are prominent in many geothermal systems, including those in Tengchong, Yunnan Province, China. However, Aquificales have not previously been isolated from Tengchong. We isolated five strains of Aquificales from diverse springs (temperature 45.2-83.3°C and pH 2.6-9.1) in the Rehai Geothermal Field from sites in which Aquificales were abundant. Phylogenetic analysis showed that four of the strains belong to the genera Hydrogenobacter, Hydrogenobaculum, and Sulfurihydrogenibium, including strains distant enough to likely justify new species of Hydrogenobacter and Hydrogenobaculum. The additional strain may represent a new genus in the Hydrogenothermaceae. All strains were capable of aerobic respiration under microaerophilic conditions; however, they had variable capacity for chemolithotrophic oxidation of hydrogen and sulfur compounds and nitrate reduction.