| 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. nov., comb. nov. | a group of sea-ice-derived psychrophilic bacterial strains possessing the unusual ability to synthesize the polyunsaturated fatty acids eicosapentaenoic acid (20:5 omega 3) and arachidonic acid (20:4 omega 6) belong to the family flavobacteriaceae (flexibacter-bacteroides-flavobacterium phylum), according to 16s rrna sequence analysis. surprisingly, the isolates were also found to cluster closely to the moderately halophilic and psychrotrophic species [flavobacterium] gondwanense (sequence simil ... | 1998 | 9639931 |
| poles apart: biodiversity and biogeography of sea ice bacteria. | this review introduces the subjects of bacterial biodiversity and biogeography. studies of biogeography are important for understanding biodiversity, the occurrence of threatened species, and the ecological role of free-living and symbiotic prokaryotes. a set of postulates is proposed for biogeography as a guide to determining whether prokaryotes are "cosmopolitan" (found in more than one geographic location on earth) or candidate endemic species. the term "geovar" is coined to define a geograph ... | 1999 | 10547690 |
| diversity of thiosulfate-oxidizing bacteria from marine sediments and hydrothermal vents. | species diversity, phylogenetic affiliations, and environmental occurrence patterns of thiosulfate-oxidizing marine bacteria were investigated by using new isolates from serially diluted continental slope and deep-sea abyssal plain sediments collected off the coast of new england and strains cultured previously from galapagos hydrothermal vent samples. the most frequently obtained new isolates, mostly from 10(3)- and 10(4)-fold dilutions of the continental slope sediment, oxidized thiosulfate to ... | 2000 | 10919760 |
| polyamine distribution profiles in the eighteen genera phylogenetically located within the flavobacterium-flexibacter-cytophaga complex. | cellular polyamines of eighteen genera belonging to the flavobacterium-flexibacter-cytophaga complex were analysed by ion exchange liquid chromatography. homospermidine was the major polyamine in the genera bergeyella, riemerella, ornithobacterium, weeksella, capnocytophaga, polaribacter and psychroflexus belonging to the family flavobacteriaceae. in the family spirosomaceae, runella, spirosoma and flectobacillus species contained spermidine whereas cyclobacterium species contained homospermidin ... | 2001 | 11491527 |
| large production of an aromatic amine, 2-phenylethylamine, in a psychrophilic marine bacterium, psychroflexus torquis. | | 2001 | 12483562 |
| psychroflexus tropicus sp. nov., an obligately halophilic cytophaga-flavobacterium-bacteroides group bacterium from an hawaiian hypersaline lake. | a gram-negative bacterium designated la1(t) was isolated from water collected in hypersaline lake laysan on laysan island in the northwestern hawaiian islands. cells occurred singly as fine rods to short filaments. growth in 50 % strength marine broth occurred optimally when the medium contained 7.5-10 % (w/v) nacl. the major fatty acids in la1(t) grown at 15 and 30 degrees c were 12-methyl tetradecanoic acid and 13-methyl tetradecanoic acid, respectively. the nucleotide sequence of the 16s rrna ... | 2004 | 15143045 |
| distribution of two triamines, spermidine and homospermidine, and an aromatic amine, 2-phenylethylamine, within the phylum bacteroidetes. | cellular polyamines of the newly additional 19 species belonging to the class bacteroides of the phylum bacteroidetes were analyzed by hplc to display polyamine distribution as a chemotaxonomic marker within the total 41 species. three profiles, the presence of spermidine, the presence of homospermidine and the absence of both triamines, corresponded to their phylogenetical positions within the four families of the class. the occurrence of an aromatic amine, 2-phenylethylamine, extracted into ce ... | 2004 | 15747230 |
| nonlabens tegetincola gen. nov., sp. nov., a novel member of the family flavobacteriaceae isolated from a microbial mat in a subtropical estuary. | an orange-pigmented, gram-negative, non-motile, rod-shaped, strictly aerobic bacterium (ust030701-324t) was isolated from a microbial mat in an estuary in the bahamas. the dna g+c content was 33.6 mol%. predominant fatty acids were i15 : 0, i16 : 0, i17 : 0 3-oh, and summed feature 3, comprising i15 : 0 2-oh and/or 16 : 1omega7c. mk-6 was the only respiratory quinone. flexirubin-type pigments were not produced. phylogenetic analysis based on 16s rrna gene sequences placed ust030701-324t in a dis ... | 2005 | 16280483 |
| [phylogenetic diversity and cold-adaptive hydrolytic enzymes of culturable psychrophilic bacteria associated with sea ice from high latitude ocean, artic]. | the phylogenetic diversity of culturable psychrophilic bacteria associated with sea ice from high latitude sea (77 degrees 30'n - 81 degrees 12'n), canadian basin and greenland sea arctic, was investigated. a total of 37 psychrophilic strains were isolated using three different methods of ( i ) spread plate method: 100 microl of each dilution ice-melt sample was spreaded onto the surface of marine 2216 agar (difco laboratories, detroit, mi) and incubated for 2 to 6 weeks at 4 degrees c; ( ii ) b ... | 2006 | 16736573 |
| psychroflexus sediminis sp. nov., a mesophilic bacterium isolated from salt lake sediment in china. | a novel gram-negative, mesophilic, slightly halophilic, catalase- and oxidase-positive, obligately aerobic bacterium, designated strain yim-c238(t), was isolated from a sediment sample from a salt lake in the qaidam basin, north-west china. cells were non-sporulating, non-motile, straight to slightly curved rods. coccoid bodies and filaments of varying length developed in older cultures. growth occurred with 0.5-6 % (w/v) nacl [optimum, 2-3 % (w/v) nacl], at ph 6.0-10.0 (optimum, ph 7.0-8.0) and ... | 2009 | 19244443 |
| psychroflexus salinarum sp. nov., isolated from a marine solar saltern. | a gram-negative, non-motile and rod-shaped bacterial strain, isl-14(t), was isolated from a marine solar saltern of the yellow sea, korea, and its taxonomic position was investigated by a polyphasic study. strain isl-14(t) grew optimally at ph 7.0-8.0, 30 degrees c and in the presence of approximately 2 % (w/v) nacl. it contained mk-6 as the predominant menaquinone and anteiso-c(15 : 0), iso-c(15 : 0) and iso-c(16 : 0) 3-oh as the major fatty acids. the dna g+c content was 38.5 mol%. a phylogene ... | 2009 | 19620356 |
| distribution of prokaryotic genetic diversity in athalassohaline lakes of the atacama desert, northern chile. | athalassohaline lakes are inland saline aquatic environments with ionic proportions quite different from the dissolved salts in seawater. prokaryotes inhabiting athalassohaline environments are poorly known and very few of such places have been surveyed for microbial diversity studies around the world. we analyzed the planktonic bacterial and archaeal assemblages inhabiting several of these evaporitic basins in a remote and vast area in northern chile by pcr-denaturing gradient gel electrophores ... | 2004 | 19712431 |
| psychroflexus lacisalsi sp. nov., a moderate halophilic bacterium isolated from a hypersaline lake (hunazoko-ike) in antarctica. | a novel gram-negative, aerobic, moderate halophilic, and psychrotolerant bacterium, designated as strain h7(t), was isolated from a hypersaline lake located in skarvsnes, antarctica. cells were filaments with varying lengths. coccoid bodies developed in old cultures. growth occurred with 0.5-15% (w/v) nacl (optimum, 5.8-7.0%), at ph 6.0-10.0 (optimum, ph 7.0-8.0), and at 10-28 degrees c (optimum, 25 degrees c). the strain had a g+c content of 34.9 mol%, which is within the range of 32-36 mol% re ... | 2010 | 20437146 |
| marine bacterioplankton diversity and community composition in an antarctic coastal environment. | the bacterial community inhabiting the water column at terra nova bay (ross sea, antarctica) was examined by the fluorescent in situ hybridization (fish) technique and the genotypic and phenotypic characterization of 606 bacterial isolates. overall, the fish analysis revealed a bacterioplankton composition that was typical of antarctic marine environments with the cytophaga/flavobacter (cf) group of bacteroidetes that was equally dominant with the actinobacteria and gammaproteobacteria. as sampl ... | 2011 | 21748267 |
| Psychroflexus halocasei sp. nov. , isolated from a aberrant cheese surface ripening microbial consortium. | A novel halophilic, Gram-reaction-negative, strictly aerobic, non-motile, rod-shaped and oxidase- and catalase-positive bacterial strain, designated WCC 4520(T), was isolated from a Raclette-type semi-hard cheese. The colonies were yellow-orange; flexirubin-type pigments were not found. The strain hydrolyzed gelatin, hippurate, tyrosine, Tween 20 and Tween 80. Optimal growth was observed with 6-8 % (w/v) NaCl, at pH 7-8 and at 27-30°C. The genomic G + C content was 33.6 ± 0.5 mol%. Phylogentic a ... | 2011 | 21984670 |