Octadecabacter arcticus gen nov, sp nov, and O-antarcticus, sp nov, nonpigmented, psychrophilic gas vacuolate bacteria from polar sea ice and water

被引:98
作者
Gosink, JJ
Herwig, RP
Staley, JT
机构
[1] University of Washington, Microbiology, Seattle, WA
[2] School of Fisheries, University of Washington, Seattle, WA
[3] University of Washington, Microbiology, Seattle, WA 98195-7242
基金
美国国家科学基金会;
关键词
Octadecabacter arcticus; Octabadecabacter antarcticus; marine bacteria; phylogeny; gas vesicles; arctic bacteria; antarctic bacteria; biogeography;
D O I
10.1016/S0723-2020(97)80003-3
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
Heterotrophic. psychrophilic, gas vasuolate bacteria were recovered from arctic and antarctic sea ice and water. Cellular fatty acid analysis was used to group these isolates. One group herein descrihed as the new genus Octadecabacter, had octadecenoic acid (18:1) in excess of 70% of their total fatty acid content. Phylogenetic analysis of the 16S rRNA of several strains from this group revealed that they were members of the alpha Proteobacteria and were most closely related to the genus Roseobacter. Further phenotypic and genotypic tests showed that these strains can be distinguished from Roseobacter on thr basis of low levels of DNA/DNA hybridization. lack of bacteriochlorophyll a, and because they are psychrophiles. Octadecabacter gen. nov., contains both a north polar species, O, arcticus sp, nov, str, 238, and a south polar species. O. antarcticus sp. nov. str. 307. This genus may be useful for examining the extent of procaryotic biogeographic dispersal.
引用
收藏
页码:356 / 365
页数:10
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