| reclassification of species of the spiral-shaped phototrophic purple non-sulfur bacteria of the alpha-proteobacteria: description of the new genera phaeospirillum gen. nov., rhodovibrio gen. nov., rhodothalassium gen. nov. and roseospira gen. nov. as well as transfer of rhodospirillum fulvum to phaeospirillum fulvum comb. nov., of rhodospirillum molischianum to phaeospirillum molischianum comb. nov., of rhodospirillum salinarum to rhodovibrio salexigens. | the 165 rdna sequence of rhodospirillum mediosalinum was determined and compared with corresponding sequences from other spiral-shaped purple non-sulfur bacteria classified as or related to the genus rhodospirillum in the alpha subclass of the proteobacteria. sequence similarities separate the currently recognized rhodospirillum species into five different groups with no more than 91% sequence similarity, clearly indicating the necessity to recognize these groups as different genera. major diagn ... | 1998 | 9734033 |
| plasmid transfer and susceptibility to antibiotics in the halophilic phototrophs rhodovibrio salinarum and rhodothalassium salexigens. | the present study defines a series of genetic procedures to be used for molecular studies in photosynthetic halophilic species such as rhodovibrio salinarum and rhodothalassium salexigens. in both species, the minimal inhibitory concentrations for the antibiotics tetracycline, rifampicin, chloramphenicol, spectinomycin, streptomycin, and kanamycin were determined. in addition, conjugal transfer of incp and incq plasmids from escherichia coli was demonstrated and the resistance markers expressed ... | 2001 | 11287156 |
| isolation and characterization of spirilloid purple phototrophic bacteria forming red layers in microbial mats of mediterranean salterns: description of halorhodospira neutriphila sp. nov. and emendation of the genus halorhodospira. | microbial mats developing in the hypersaline lagoons of a commercial saltern in the salin-de-giraud (rhône delta) were found to contain a red layer fully dominated by spirilloid phototrophic purple bacteria underlying a cyanobacterial layer. from this layer four strains of spirilloid purple bacteria were isolated, all of which were extremely halophilic. all strains were isolated by using the same medium under halophilic photolithoheterotrophic conditions. one of them, strain sg 3105 was a purple ... | 2003 | 12656167 |
| pelagibius litoralis gen. nov., sp. nov., a marine bacterium in the family rhodospirillaceae isolated from coastal seawater. | a gram-negative, strictly aerobic, slightly curved rod-shaped bacterial strain, designated cl-uu02(t), was isolated from coastal seawater off the east coast of korea. 16s rrna gene sequence analysis revealed a clear affiliation of this novel strain with the family rhodospirillaceae. strain cl-uu02(t) formed a robust cluster with the type strains of species of the genus rhodovibrio at 16s rrna gene sequence similarity levels of 89.9-90.4 %. strain cl-uu02(t) shared no more than 89 % 16s rrna gene ... | 2009 | 19329613 |
| fodinicurvata sediminis gen. nov., sp. nov. and fodinicurvata fenggangensis sp. nov., poly-beta-hydroxybutyrate-producing bacteria in the family rhodospirillaceae. | two gram-negatively stained, facultatively anaerobic, non-motile, vibrioid and rod-shaped, chemoheterotrophic bacterial strains, designated yim d82(t) and yim d812(t), were isolated from a salt mine in yunnan, south-west china. dna-dna hybridization, genomic dna g+c content and phylogenetic analyses based on 16s rrna gene sequences divided the two isolates into two distinct genospecies that were also clearly differentiated by fatty acid profiles, carbon source utilization patterns, antibiotic su ... | 2009 | 19622654 |
| the pigment-protein compound in photosynthetic bacteria : ii. the absorption curves of photosynthin from several species of bacteria. | absorption curves have been obtained in the spectral region of 450 to 900 mmicro for the water soluble cell juice of four species of photosynthetic bacteria, spirillum rubrum (strain s1), rhodovibrio sp. (strain gaffron), phaeomonas sp. (strain delft), and streptococcus varians (strains c11 and orig.). these curves all show maxima at 790 and 590 mmicro due to bacteriochlorophyll, whose highest band, however, occurs at 875, 855, or 840 mmicro depending on the species. the bacteria that appear red ... | 1940 | 19873170 |
| phaeovibrio sulfidiphilus gen. nov., sp. nov., phototrophic alphaproteobacteria isolated from brackish water. | two strains (ja480(t) and ja481) of phototrophic alphaproteobacteria were isolated from sediment samples collected from brackish water near nagapattinam, india. they were gram-negative, vibrioid cells containing bacteriochlorophyll a and rhodopin as major photosynthetic pigments. most cells of both strains were non-flagellated; 1 % of cells showed two monopolar flagella. cells showed positive phototaxis. both strains showed chimeric intracellular photosynthetic membranes, where both lamellar sta ... | 2011 | 20495036 |
| prokaryotic diversity in aran-bidgol salt lake, the largest hypersaline playa in iran. | prokaryotic diversity in aran-bidgol salt lake, a thalasohaline lake in iran, was studied by fluorescence in situ hybridization (fish), cultivation techniques, denaturing gradient gel electrophoresis (dgge) of pcr-amplified fragments of 16s rrna genes and 16s rrna gene clone library analysis. viable counts obtained (2.5-4×10(6) cells ml(-1)) were similar to total cell abundance in the lake determined by dapi direct count (3-4×10(7) cells ml(-1)). the proportion of bacteria to archaea in the comm ... | 2011 | 22185719 |