title: [A psychrotolerant Caulobacter sp. from Russian polar tundra soil].
abstract: Strain Z-0024, a psychrotolerant aerobic heterotrophic representative of the prosthecate bacteria of the genus Caulobacter, was isolated from a methanotrophic enrichment obtained from Russian polar tundra soil. The cells of the new isolate are vibrios (0.5-0.6 x 1.3-1.8 microm) with a polar stalk. The organism grows in a temperature range from 5 to 36 degrees C, with an optimum at 20 degrees C. The pH range for growth is from 4.5 to 7.0 with an optimum at pH 6.0. Strain Z-0024 utilizes a wide range of organic compounds: sugars, amino acids, volatile fatty acids, and primary alcohols. It tolerates a NaCl concentration in the medium of up to 15 g/l. The G + C content of DNA is 66.6 mol %. The 16S rRNA gene sequence analysis revealed that strain Z-0024 belongs to the cluster of Caulobacter species, showing a 98.8-99.2% sequence similarity to them. DNA-DNA hybridization revealed a low level of homology (24%) between strain Z-0024 and C. vibrioides ATCC 15252. The new isolate is described as Caulobacter sp. Z-0024.
authors.forename: Iu Iu
authors.initials: IuIu
authors.lastname: Berestovskaia
authors.forename: A M
authors.initials: AM
authors.lastname: Lysenko
authors.forename: T P
authors.initials: TP
authors.lastname: Turova
authors.forename: L V
authors.initials: LV
authors.lastname: Vasil'eva
mesh_terms: D001482:Base Composition; D016934:Caulobacter / Q000166:cytology / Q000302:isolation & purification* / Q000502:physiology; D006863:Hydrogen-Ion Concentration; D008969:Molecular Sequence Data; D009930:Organic Chemicals / Q000378:metabolism; D010802:Phylogeny; D012329:RNA, Bacterial / Q000235:genetics; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D012426:Russia; D012988:Soil Microbiology; D013045:Species Specificity; D013696:Temperature
chemical_list: D009930:Organic Chemicals; D012329:RNA, Bacterial; D012336:RNA, Ribosomal, 16S