期刊
INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY
卷 60, 期 -, 页码 1173-1176出版社
MICROBIOLOGY SOC
DOI: 10.1099/ijs.0.010132-0
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- Cheetham Salt Ltd (Geelong)
Two isolates of non-alkaliphilic, extremely halophilic archaea, with very similar characteristics, were recovered from a marine solar saltern crystallizer. Cells were pleomorphic, motile and Gram-stain-negative and grew on a limited range of carbon sources, with pyruvate being the best substrate. Optimum growth occurred at 18-20% (w/v) NaCl, pH 6.0-8.5 and 37-40 degrees C. Both isolates possessed typical archaeal lipids, and their 16S rRNA gene sequences were 99.8% identical. Phylogenetic tree reconstructions indicated that they were most closely related to the haloalkaliphile Natronomonas pharaonis (97.5% similarity to the type strain), but the different phenotypic properties and low DNA-DNA hybridization values between Nmn. pharaonis DSM 2160(T) and the two isolates suggested that they represent a novel species within the genus Natronomonas. The name Natronomonas moolapensis sp. nov. is proposed for these isolates, with the type strain being 8.8.11(T) (=JCM 14361(T) =CECT 7526(T) =DSM 18674(T)). An emended description of the genus Natronomonas is also provided.
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