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Shewanella gelidimarina sp. nov. and Shewanella frigidimarina sp. nov., novel Antarctic species with the ability to produce eicosapentaenoic acid (20:5 omega 3) and grow anaerobically by
On the basis of polyphasic taxonomic data, the Antarctic iron-reducing strains are placed in two new species, Shewanella frigidimarina sp. Expand
Psychroflexus torquis gen. nov., sp. nov., a psychrophilic species from Antarctic sea ice, and reclassification of Flavobacterium gondwanense (Dobson et al. 1993) as Psychroflexus gondwanense gen.
Evidence based on phylogeny and fatty acid profiles supports the conclusion that the taxa are close relatives distinct from other bacterial groups, and it is proposed that the sea ice strains represent a novel taxon designated Psychroflexus torquis gen. nov. Expand
Methylosphaera hansonii gen. nov., sp. nov., a psychrophilic, group I methanotroph from Antarctic marine-salinity, meromictic lakes.
On the basis of polyphasic taxonomic characteristics the Antarctic lake isolates represent a novel group I methanotrophic genus with the proposed name Methylosphaera hansonii (type strain ACAM 549), which is a distinct line of descent in the family Methylococcaceae. Expand
Phospholipid fatty acid and lipopolysaccharide fatty acid signature lipids in methane‐utilizing bacteria
The phospholipid fatty acids (PLFA) and lipopolysaccharide (LPS)—hydroxy fatty acids of a variety of methane-utilizing bacterial strains— were analysed by gas chromatography/mass spectrometry. Type IExpand
Algicidal bacteria associated with blooms of a toxic dinoflagellate in a temperate Australian estuary
Concentrations of algicidal compounds required for algal lysis in laboratory experiments indicate that the 5 bacterial species can be effective against G. catenatum vegetative cells if they dominate the bacterial population in the estuary, particularly when attached to particles. Expand
Colwellia demingiae sp. nov., Colwellia hornerae sp. nov., Colwellia rossensis sp. nov. and Colwellia psychrotropica sp. nov.: psychrophilic Antarctic species with the ability to synthesize
These studies indicate that the DHA-producing Antarctic isolates consist of five different Colwellia species: Col wellia psychrerythraea and four novel species with the proposed names ColwellIA demingiae sp. Expand
Effect of uv-b on lipid content of three antarctic marine phytoplankton
The results indicate that the effect of UV-B irradiances on the lipid content of Antarctic marine phytoplankton is species-specific and may alter the nutritional quality of food available to higher trophic levels. Expand
Flavobacterium hibernum sp. nov., a lactose-utilizing bacterium from a freshwater Antarctic lake.
Four freshwater Antarctic lakes were examined for the presence of beta-galactosidase-producing bacteria using mineral medium enrichments and lactose and two strains were isolated that were very similar in phenotype and fatty acid profile, and shared considerable homology in their DNA. Expand
Shewanella olleyana sp. nov., a marine species isolated from a temperate estuary which produces high levels of polyunsaturated fatty acids.
Sequence analysis indicated that ACEM 6 and ACEM 9(T) had identical 16S rDNA sequences and were most closely related to Shewanella japonica, and DNA hybridization and phenotypic characteristics confirmed that the isolates constituted a novel species of the genus Shewanelle. Expand
Ecology of a novel Synechococcus clade occurring in dense populations in saline Antarctic lakes
Characterization of non-axenic cultures indicated that the Antarctic lake Synechococcus populations were similar to other polar picocyanobacteria in terms of cardinal growth temperatures (minimum, optimum, maximum: Tmin -17.0°C, Topt 19.8°C) and slow growth. Expand