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  • 2020-2024  (18)
  • 1975-1979  (6)
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  • 1
    Online Resource
    Online Resource
    Advances in the Biology of Phototrophic Bacteria (2021)
    Basel, Switzerland : MDPI - Multidisciplinary Digital Publishing Institute
    Details Availability
    Keywords: Research & information: general
    Description / Table of Contents: The application of genomic, transcriptomic, and proteomic analyses brings new dimensions to our understanding of the biology of phototrophic bacteria. Comparing gene sequences of photosynthetic reaction center proteins and a key enzyme of bacteriochlorophyll biosynthesis from more than 150 genomes demonstrates the ancient roots of phototrophic bacteria. The presence and phylogeny of biosynthetic pathways of the compatible solutes ectoine and glycine betaine define groups of marine and halophilic phototrophic bacteria. The wide range of ecological niches conquered during evolution is demonstrated by the adaptation of cyanobacterial genera Scytonema, Tolypothrix, and Nostoc to different temperature ranges and the adaptation of Heliorestis species to alkaline habitats. Differences between phototrophic purple bacteria from marine and freshwater habitats are reflected in the preference for sulfidic and non-sulfidic niches. Also, a high proportion of siderophore producers was found among isolates from freshwater sources opposed to those from salty habitats . The primary colonization of carbonate rocks by a group of novel endolithic cyanobacteria and the following successions were studied over 9 months. The genomic characterization of the aerobic Dinoroseobacter strain AAP5, the strictly anaerobic and syntrophic Prosthecochloris ethylica, and the strictly anaerobic Heliorestis convoluta is reported. Significant differences in relation to oxygen are reflected in oxygen production by some species, oxygen tolerance over a wide range of concentrations, and the use of oxygen for energy generation or a strictly anaerobic lifestyle. Relations to oxygen are highlighted in papers on photooxidative stress, regulation of iron–sulfur cluster formation, and interactions of redox regulators. In situ metatranscriptomic and proteomic studies demonstrate the high metabolic flexibility of Chloroflexus aggregans in a hot spring microbial mat and show its adaptation to the changing conditions over day and night periods by a well-coordinated regulation of key metabolic processes for both phototrophic and chemotrophic growth
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (274 p.)
    ISBN: 9783036522692 , 9783036522708
    URL: https://directory.doabooks.org/handle/20.500.12854/76952
    Language: English
    Note: English
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  • 2
    Book
    Book
    Advances in the Biology of Phototrophic Bacteria (2021)
    Basel, Switzerland : MDPI - Multidisciplinary Digital Publishing Institute
    Details Availability
    Description / Table of Contents: The application of genomic, transcriptomic, and proteomic analyses brings new dimensions to our understanding of the biology of phototrophic bacteria. Comparing gene sequences of photosynthetic reaction center proteins and a key enzyme of bacteriochlorophyll biosynthesis from more than 150 genomes demonstrates the ancient roots of phototrophic bacteria. The presence and phylogeny of biosynthetic pathways of the compatible solutes ectoine and glycine betaine define groups of marine and halophilic phototrophic bacteria. The wide range of ecological niches conquered during evolution is demonstrated by the adaptation of cyanobacterial genera Scytonema, Tolypothrix, and Nostoc to different temperature ranges and the adaptation of Heliorestis species to alkaline habitats. Differences between phototrophic purple bacteria from marine and freshwater habitats are reflected in the preference for sulfidic and non-sulfidic niches. Also, a high proportion of siderophore producers was found among isolates from freshwater sources opposed to those from salty habitats . The primary colonization of carbonate rocks by a group of novel endolithic cyanobacteria and the following successions were studied over 9 months. The genomic characterization of the aerobic Dinoroseobacter strain AAP5, the strictly anaerobic and syntrophic Prosthecochloris ethylica, and the strictly anaerobic Heliorestis convoluta is reported. Significant differences in relation to oxygen are reflected in oxygen production by some species, oxygen tolerance over a wide range of concentrations, and the use of oxygen for energy generation or a strictly anaerobic lifestyle. Relations to oxygen are highlighted in papers on photooxidative stress, regulation of iron–sulfur cluster formation, and interactions of redox regulators. In situ metatranscriptomic and proteomic studies demonstrate the high metabolic flexibility of Chloroflexus aggregans in a hot spring microbial mat and show its adaptation to the changing conditions over day and night periods by a well-coordinated regulation of key metabolic processes for both phototrophic and chemotrophic growth
    Type of Medium: Book
    Pages: VII, 264 Seiten , graph. Darst.
    ISBN: 9783036522692
    Language: English
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  • 3
    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
  • 4
    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
  • 5
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    Unknown
    Physico-chemical parameters and accession numbers from the Logatchev Hydrothermal Field, located 15°N on the Mid-Atlantic Ridge (2021)
    PANGAEA
    Details
    Publication Date: 2023-03-15
    Description: Hydrothermal fluid samples were retrieved during dives made by the remotely operated vehicle (ROV) QUEST (MARUM, University of Bremen) during the HYDROMAR I (M60/3, 2004) and HYDROMAR II (M64/2, 2005) cruises to the Logatchev hyrothermal field. The samples were retrieved using a pumped flow-through system (Kiel Pumping System KIPS) specially designed for the ROV QUEST. Once on board the ship, the liquids intended for microbiological studies were concentrated on 0.2 µm pore size polycarbonate filters (Sartorius) and stored at -20°C. The pH and sulfide concentrations were determined immediately after sample recovery. The pH was measured (Mettler electrodes with Ag/AgCl reference electrode) at 25°C in unfiltered sample aliquots. Sulfide concentrations were determined photometrically following the methylene blue method or, for samples with low concentrations, by voltammetry (Metrohm Application Bulletin 199/3e). Methane was analyzed on board by applying a purge and trap technique. For on-board measurements of dissolved hydrogen the water sample was degassed into a high-grade vacuum. Aliquots of the released gas were analyzed by gas chromatography (Thermo Electron Corporation Trace GC Ultra with a pulsed discharge detector). The abundance of bacterial and archaeal taxa was investigated by sequencing of the 16S rRNA gene. The diversity of the cbbL, cbbM and aclb was investigated by sequencing of the genes.
    Keywords: Accession number, genetics; ANME-2; Area/locality; chemoautotrophy; Epsilonproteobacteria; fluid chemistry; Gene name; Hydrogen; hydrogen oxidation; Hydrogen sulfide; LHF; Logatchev_Hydrothermal-Field; Logatchev hydrothermal field; Methane; Methanococcales; Mid-Atlantic Ridge; pH; Remote operated vehicle QUEST; ROVQ; sulfur oxidation; Temperature, water; ultramafic-hosted
    Type: Dataset
    Format: text/tab-separated-values, 26 data points
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    DATA PANGAEA
  • 6
    facet.materialart.
    Unknown
    Physico-chemical parameters and accession numbers from the Lilliput hydrothermal field, southern Mid-Atlantic Ridge (9°S) (2021)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Description: Hydrothermal vent fluids were sampled with a pumped flow-through system with PFA sampling bottles (Kiel Pumping System KIPS) by the ROV QUEST. Fuid chemical parameters were determined immediately after sample recovery. Ph was measured at 20°C in unfiltered sample aliquots. Sulfide concentrations were measured colorimetrcally following the methylene blue method. Fe(II) and Fe(III) was measured colorimetrically with the phenantroline assay. Total Fe was measured by reducing all Fe(III) to Fe(II) with ascorbic acid. Fe(III) was calculated from the diffrence between Fe(II) and total Fe. Light dissolved hydrocharbons were analysed on board applying a purge and trap technique. Dissolved hydrogen was mesured onboard by a GC equipped with a PDD. Stable carbon isotope signatures of methane were analysed using coupled gas chromatography-combustion-isotope ration mass spectrometry. The abundance of bacterial and archaeal taxa was investigated by sequencing of the 16S rRNA gene. The diversity of the cbbL, cbbM and aclb was investigated by sequencing of the genes.
    Keywords: Accession number, genetics; Area/locality; Candidate Divisions; Endmember fluid portion; Epsilonproteobacteria; fish; Gene name; Hydrogen; Hydrogen sulfide; Iron 2+; Iron 3+; low-temperature hydrothermal fluids; M64/1; M64/1_Lilliput-hydrothermal-field; M68/1; M68/1_Lilliput-hydrothermal-field; MARSUED2; MARSUED3; Meteor (1986); Methane; microbial community; Mid-Atlantic Ridge; pH; Remote operated vehicle QUEST; ROVQ; Sampling date; sulfur oxidation; Temperature, water; Thiomicrospira; δ13C, methane
    Type: Dataset
    Format: text/tab-separated-values, 42 data points
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    DATA PANGAEA
  • 7
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    Unknown
    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
  • 8
    facet.materialart.
    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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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 9
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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
  • 10
    facet.materialart.
    Unknown
    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
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    OceanRep: Article in a Scientific Journal - peer-reviewed
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