| 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 |
| occurrence of aminopropylhomospermidine as the major cellular polyamine in a halophilic, phototrophic alpha proteobacterium, rhodothalassium salexigens. | | 2001 | 12483561 |
| isolation of iodide-oxidizing bacteria from iodide-rich natural gas brines and seawaters. | iodide-oxidizing bacteria (iob), which oxidize iodide (i-) to molecular iodine (i2), were isolated from iodide-rich (63 microm to 1.2 mm) natural gas brine waters collected from several locations. agar media containing iodide and starch were prepared, and brine waters were spread directly on the media. the iob, which appeared as purple colonies, were obtained from 28 of the 44 brine waters. the population sizes of iob in the brines were 10(2) to 10(5) colony-forming units (cfu) ml(-1). however, ... | 2005 | 16047096 |
| geminicoccus roseus gen. nov., sp. nov., an aerobic phototrophic alphaproteobacterium isolated from a marine aquaculture biofilter. | a gram-negative, strictly aerobic, diplococcoid bacterium (strain d2-3(t)) was isolated from the biofilter of a recirculating marine aquaculture system. phylogenetic analysis of the 16s rrna gene sequence of d2-3(t) indicated that the new organism occupied a novel lineage within the alpha-1 subclass of proteobacteria and was related to the genera rhodothalassium, azospirillum, craurococcus, acidiphilium, and tistrella. the highest sequence similarity (90.8%) of the 16s rrna gene sequence of d2-3 ... | 2007 | 17643894 |