Journal
INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY
Volume 65, Issue -, Pages 760-765Publisher
MICROBIOLOGY SOC
DOI: 10.1099/ijs.0.000009
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Funding
- European Commission
- Russian Academy of Sciences
- Russian Foundation for Basic Research [04-13-01310]
- [14.124.13.6339]
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Two novel strains of thermophilic planctomycetes were recovered from terrestrial and subterranean habitats. Strain R1(T) was isolated from a hot spring (Kunashir Island, Russia) and strain SBP2(T) was isolated from a deep gold mine (South Africa). Both isolates grew in the temperature range 30-60 degrees C and pH range 5.0-8.0. Strain R1(T) grew optimally at 60 degrees C and pH 6.0-6.5; for SBP2(T) optimal conditions were at 52 degrees C and pH 7.5-8.0. Both strains were capable of anaerobic respiration with nitrate and nitrite as electron acceptors as well as of microaerobic growth. They also could grow by fermentation of mono-, di- and polysaccharides. Based on their phylogenetic position and phenotypic features we suggest that the new isolates represent two novel species belonging to a new genus in the order Planctomycetales, for which the names Thermogutta terrifontis gen. nov., sp. nov. and Thermogutta hypogea sp. nov. are proposed. The type strain of Thermogutta terrifontis, the type species of the genus, is R1(T) (=DSM 26237(T)=VKM B-2805(T)), and the type strain of Thermogutta hypogea is SBP2(T) (=JCM 1 9991(T)=VKM B-2782(T)).
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