| numerical taxonomy and ecology of oligotrophic bacteria isolated from the estuarine environment. | slow-growing bacteria, isolated on nutrient-rich and nutrient-limited media, from chesapeake bay water and sediment samples, were examined for 119 biochemical, cultural, morphological, nutritional, and physiological characters. those bacteria which grow on low nutrient media, termed oligotrophs, a total of 162 strains, were subjected to taxonomic analysis, as a preliminary step in determining their ecological significance. the data for all strains included in the study were examined by computer ... | 1977 | 871972 |
| taxonomic implications of reproductive mechanisms of hyphomicrobium-facies and pedomicrobium-facies of a pleomorphic budding bacterium. | | 1971 | 5316518 |
| pleomorphy in stalked, budding bacteria. | an investigation of hyphomicrobia from manganese deposits and various fresh-water habitats revealed an astonishing degree of pleomorphy in the group. a range of variation spanning two described genera (hyphomicrobium and pedomicrobium) was induced by varying culture conditions and was further observed in natural environments. it is suggested that pedomicrobium is an invalid genus. | 1967 | 5337828 |
| duplicate copies of genes encoding methanesulfonate monooxygenase in marinosulfonomonas methylotropha strain tr3 and detection of methanesulfonate utilizers in the environment. | marinosulfonomonas methylotropha strain tr3 is a marine methylotroph that uses methanesulfonic acid (msa) as a sole carbon and energy source. the genes from m. methylotropha strain tr3 encoding methanesulfonate monooxygenase, the enzyme responsible for the initial oxidation of msa to formaldehyde and sulfite, were cloned and sequenced. they were located on two gene clusters on the chromosome of this bacterium. a 5.0-kbp hindiii fragment contained msma, msmb, and msmc, encoding the large and smal ... | 2002 | 11772638 |
| binding of colloidal mno(2) by extracellular polysaccharides of pedomicrobium manganicum. | the extracellular acidic polysaccharides of the manganese-oxidizing bacterium pedomicrobium manganicum were able to bind preformed colloidal mno(2). the capacity of the cells to bind mno(2) was ph dependent. enhanced binding capacity below ph 5 suggests that ionic bonding forces are involved in the binding mechanism and that there is a charge reversal on the acidic polysaccharides between ph 5 and 4 that is due to increased protonation of carboxyl groups. | 1990 | 16348286 |
| complete biodegradation of atrazine by a microbial community isolated from a naturally derived river ecosystem (microcosm). | a microbial community, designated as an4, capable of mineralizing the herbicide atrazine was isolated from a model river ecosystem (microcosm). the profile of degradation of atrazine by the an4 community seemed to well reflect what occurred in the microcosm: rapid degradation of atrazine and transient accumulation of cyanuric acid, followed by relatively slow mineralization. the community comprised multiple phylogenetically distinct microbial strains, and the microbes were suspended and probably ... | 2009 | 19596136 |
| detection of iron-depositing pedomicrobium species in native biofilms from the odertal national park by a new, specific fish probe. | iron-depositing bacteria play an important role in technical water systems (water wells, distribution systems) due to their intense deposition of iron oxides and resulting clogging effects. pedomicrobium is known as iron- and manganese-oxidizing and accumulating bacterium. the ability to detect and quantify members of this species in biofilm communities is therefore desirable. in this study the fluorescence in situ hybridization (fish) method was used to detect pedomicrobium in iron and manganes ... | 2009 | 19638289 |
| a multicopper oxidase is essential for manganese oxidation and laccase-like activity in pedomicrobium sp. acm 3067. | pedomicrobium sp. acm 3067 is a budding-hyphal bacterium belonging to the alpha-proteobacteria which is able to oxidize soluble mn2+ to insoluble manganese oxide. a cosmid, from a whole-genome library, containing the putative genes responsible for manganese oxidation was identified and a primer-walking approach yielded 4350 bp of novel sequence. analysis of this sequence showed the presence of a predicted three-gene operon, moxcba. the moxa gene product showed homology to multicopper oxidases (m ... | 2007 | 17359266 |
| biocenosis of bac(f)s used for groundwater treatment. | the studies on the biocenosis of biologically active carbon filters (bac(f)) used in treatment of miocene water revealed the presence of protozoa of the group of flagellates and ciliates (glaucoma sp., opercularia sp.), saprophytic bacteria, phase i and ii nitrifying bacteria, fe(ii) and mn(ii) oxidizing bacteria of the family siderocapsaceae, leptothrix ochracea and pedomicrobium sp., as well as microscopic fungi. the stratification of biofilter colonisation by these microorganisms was found to ... | 2004 | 15026224 |
| diverse microbial communities inhabiting ferromanganese deposits in lechuguilla and spider caves. | lechuguilla cave is an ancient, deep, oligotrophic subterranean environment that contains an abundance of low-density ferromanganese deposits, the origin of which is uncertain. to assess the possibility that biotic factors may be involved in the production of these deposits and to investigate the nature of the microbial community in these materials, we carried out culture-independent, small subunit ribosomal rna (ssu rrna) sequence-based studies from two sites and from manganese and iron enrichm ... | 2003 | 14641587 |
| enzymes of dimethylsulfone metabolism and the phylogenetic characterization of the facultative methylotrophs arthrobacter sulfonivorans sp. nov., arthrobacter methylotrophus sp. nov., and hyphomicrobium sulfonivorans sp. nov. | novel methylotrophic arthrobacter and hyphomicrobium species are described. constitutive membrane-associated dimethylsulfone- and dimethylsulfoxide-reductases were found in arthrobacter methylotrophus strain tga and hyphomicrobium sulfonivorans strain s1. enzyme activities increased during growth with dimethylsulfone or dimethylsulfoxide, respectively, and different ratios of activity with different growth substrates indicated that they are separate enzymes. sds-page showed some membrane-associa ... | 2002 | 11807567 |
| phylogenetic relationships and uncertain taxonomy of pedomicrobium species. | the phylogenetic relationships among the species of the genus pedomicrobium were studied by comparing their 16s rrna sequences. the pedomicrobium species form a coherent phylogenetic cluster within the genera of the hyphal budding bacteria in the alpha-proteobacteria. the sequences of two strains of pedomicrobium australicum were obtained from dnas extracted from nonviable freeze-dried cells, which are the only source of material available, and were found to be almost identical (level of similar ... | 1997 | 9103624 |
| new bacteriophages active on strains of hyphomicrobium. | fifty-five lytic bacteriophages isolated from water and soil samples were active on many strains of the genus hyphomicrobium. the optimal isolation procedure was an adsorption method in which samples from a habitat similar to that of the respective host bacterium were used as the phage inoculum. according to the morphology and nucleic acid type these bacteriophages belonged to different families: myoviridae (type a1: five phages); styloviridae (type b1: 33 phages; type b2: eight phages) and podo ... | 1988 | 3199100 |
| a phylogenetic survey of budding, and/or prosthecate, non-phototrophic eubacteria: membership of hyphomicrobium, hyphomonas, pedomicrobium, filomicrobium, caulobacter and "dichotomicrobium" to the alpha-subdivision of purple non-sulfur bacteria. | the phylogenetic position of various budding and/or or prosthecate gram-negative eubacteria was determined by different methods. members of the genera hyphomicrobium, filomicrobium, pedomicrobium were investigated by 16s rrna cataloguing, a 1373 nucleotide long portion of the 16s rrna was sequenced from hyphomicrobium vulgare and the 5s rrnas were analyzed from two hyphomicrobium strains, hyphomonas polymorpha and caulobacter crescentus. comparison with published sequences indicated a membership ... | 1988 | 2455491 |