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  • 1
    Electronic Resource
    Electronic Resource
    Ectothiorhodospira halochloris sp. nov., a new extremely halophilic phototrophic bacterium containing bacteriochlorophyll b (1977)
    Springer
    Archives of microbiology 114 (1977), S. 115-121 
    Details
    ISSN: 1432-072X
    Keywords: Anaerobic phototrophic bacteria ; Ectothiorhodospira halochloris ; Halophilic bacteria ; Alkaliphilic bacteria ; Sulfide oxidation ; Bacteriochlorophyll b
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A new bacteriochlorophyll b containing phototrophic bacterium was isolated from extremely saline and alkaline soda lakes in Egypt. Enrichment and isolation were performed using a synthetic medium with high contents of sodium carbonate, sodium sulfate and sodium chloride. Photoautotrophic growth occurred with hydrogen sulfide as photosynthetic electron donor. During oxidation of sulfide to sulfate extracellular elemental sulfur globules appeared in the medium. Cells were also capable to grow under photoheterotrophic conditions with acetate, propionate, pyruvate, succinate, fumarate or malate as carbon sources and electron donors. Under these conditions sulfate was assimilated. Optimal growth under the applied experimental conditions occurred at a total salinity of 14–27%, a pH-range between 8.1 and 9.1 and a temperature between 47°C and 50°C. The cells were 0.5–0.6 μm wide and, depending on cultural conditions, 2.5–8.0 μm long; they were spiral shaped, multiplied by binary fission and were motile by means of bipolar flagella. Intercytoplasmic photosynthetic membranes were present as stacks. Bacteriochlorophyll b was the main photosynthetic pigment; small amounts of carotenoids were mainly present as glucosides of rhodopin and its methoxy derivative. The new organism is described as Ectothiorhodospira halochloris.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00410772
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Marine sponges as habitats of anaerobic phototrophic bacteria (1976)
    Springer
    Microbial ecology 3 (1976), S. 1-9 
    Details
    ISSN: 1432-184X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Enrichment cultures were prepared with different media for phototrophic bacteria from four species of marine sponges, collected from oxic coastal waters near Split (Yugoslavia). We obtained pure cultures of six strains ofChromatiaceae and two strains ofRhodospirillaceae by agar shake dilution. TheRhodospirillaceae were identified asRhodopseudomonas sulfidophila and a marine form ofRhodopseudomonas palustris. TheChromatiaceae were identified asChromatium vinosum, Chromatium gracile, Chromatium minutissimum. Ectothiorhodospira mobilis, and a Chromatium species, which in some respects resemblesChromatium minus. The occurrence of strictly anaerobic phototrophic bacteria in aerobic sponges is discussed with respect to nutrition and possible syntrophism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02011449
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    Paper (German National Licenses)
    Fulltext
  • 3
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    Marine sponges as habitats of anaerobic phototrophic bacteria (1976)
    Springer
    In:  Microbial Ecology, 3 (1). pp. 1-9.
    Details
    Publication Date: 2015-03-10
    Description: Enrichment cultures were prepared with different media for phototrophic bacteria from four species of marine sponges, collected from oxic coastal waters near Split (Yugoslavia). We obtained pure cultures of six strains of Chromatiaceae and two strains of Rhodospirillaceae by agar shake dilution. The Rhodospirillaceae were identified as Rhodopseudomonas sulfidophila and a marine form of Rhodopseudomonas palustris. TheChromatiaceae were identified as Chromatium vinosum, Chromatium gracile, Chromatium minutissimum. Ectothiorhodospira mobilis, and a Chromatium species, which in some respects resembles Chromatium minus. The occurrence of strictly anaerobic phototrophic bacteria in aerobic sponges is discussed with respect to nutrition and possible syntrophism
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1007/BF02011449
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 4
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    Unknown
    Isolation of extremely halophilic phototrophic bacteria from the alkaline Wadi Natrun, Egypt (1978)
    Schweizerbart
    In:  Archiv für Hydrobiologie, 84 . pp. 381-388.
    Details
    Publication Date: 2015-03-24
    Type: Article , PeerReviewed
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  • 5
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    Unknown
    The Wadi Natrun: Chemical composition and microbial mass developments in alkaline brines of Eutrophic Desert Lakes (1979)
    Taylor & Francis
    In:  Geomicrobiology Journal, 1 (3). pp. 219-234.
    Details
    Publication Date: 2015-03-10
    Description: Six lakes of the Wadi Natrun, Egypt, were studied with respect to the chemical composition of their brines and the occurrence of microbial mass developments. All investigated lakes showed pH values of approximately 11 and a total salt content of generally more than 30%. The main components were sulfate, carbonate, chloride, sodium, and minor amounts of potassium. Only traces of magnesium and calcium were present, but unusually high concentrations of organic carbon compounds, nitrogen compounds, and phosphate were found. Mass developments of phototrophic sulfur bacteria, halobacteria, cyanobacteria, and green algae were observed. The functions of complete nitrogen and sulfur cycles in the alkaline brines are discussed. The properties of the lakes and their ecology are compared with data on the Dead Sea and Great Salt Lake, Utah.
    Type: Article , PeerReviewed
    DOI: 10.1080/01490457909377733
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 6
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    Ectothiorhodospira halochloris sp. nov., a new extremely halophilic phototrophic bacterium containing bacteriochlorophyll b (1977)
    Springer
    In:  Archives of Microbiology, 114 (2). pp. 115-121.
    Details
    Publication Date: 2015-03-24
    Description: A new bacteriochlorophyll b containing phototrophic bacterium was isolated from extremely saline and alkaline soda lakes in Egypt. Enrichment and isolation were performed using a synthetic medium with high contents of sodium carbonate, sodium sulfate and sodium chloride. Photoautotrophic growth occurred with hydrogen sulfide as photosynthetic electron donor. During oxidation of sulfide to sulfate extracellular elemental sulfur globules appeared in the medium. Cells were also capable to grow under photoheterotrophic conditions with acetate, propionate, pyruvate, succinate, fumarate or malate as carbon sources and electron donors. Under these conditions sulfate was assimilated. Optimal growth under the applied experimental conditions occurred at a total salinity of 14–27%, a pH-range between 8.1 and 9.1 and a temperature between 47°C and 50°C. The cells were 0.5–0.6 μm wide and, depending on cultural conditions, 2.5–8.0 μm long; they were spiral shaped, multiplied by binary fission and were motile by means of bipolar flagella. Intercytoplasmic photosynthetic membranes were present as stacks. Bacteriochlorophyll b was the main photosynthetic pigment; small amounts of carotenoids were mainly present as glucosides of rhodopin and its methoxy derivative. The new organism is described as Ectothiorhodospira halochloris.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1007/BF00410772
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    OceanRep: Article in a Scientific Journal - peer-reviewed
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