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  • 1
    Electronic Resource
    Electronic Resource
    A thermophilic green sulfur bacterium from New Zealand hot springs, Chlorobium tepidum sp. nov. (1991)
    Springer
    Archives of microbiology 156 (1991), S. 81-90 
    Details
    ISSN: 1432-072X
    Keywords: Chlorobium tepidum ; Photosynthesis ; Green sulfur bacteria ; Chlorosomes ; Bacteriochlorophyll ; Thermophily ; Hot springs ; 16S rRNA
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Thermophilic green sulfur bacteria of the genus Chlorobium were isolated from certain acidic high sulfide New Zealand hot springs. Cells were Gram-negative nonmotile rods of variable length and contained bacteriochlorophyll c and chlorosomes. Cultures of thermophilic chlorobia grew only under anaerobic, phototrophic conditions, either photoautotrophically or photoheterotrophically. The optimum growth temperature for the strains of thermophilic green sulfur bacteria isolated was 47–48°C with generation times of about 2 h being observed. The upper temperature limit for growth was about 52°C. Thiosulfate was a major electron donor for photoautotrophic growth while sulfide alone was only poorly used. N2 fixation was observed at 48°C and cell suspensions readily reduced acetylene to ethylene. The G+C content of DNA from strains of thermophilic chlorobia was 56.5–58.2 mol% and the organisms positioned phylogenetically within the green sulfur bacterial branch of the domain Bacteria. The new phototrophs are described as a new species of the genus Chlorobium, Chlorobium tepidum.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00290978
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Heliobacterium modesticaldum, sp. nov., a thermophilic heliobacterium of hot springs and volcanic soils (1995)
    Springer
    Archives of microbiology 163 (1995), S. 259-267 
    Details
    ISSN: 1432-072X
    Keywords: Key words Anoxygenic phototrophic bacteria ; Heliobacteria ; Heliobacterium modesticaldum ; Thermophily ; Hot springs ; Phylogeny
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Enrichment cultures for heliobacteria at 50°C yielded several strains of a thermophilic heliobacterium species from Yellowstone hot spring microbial mats and volcanic soils from Iceland. The novel organisms grew optimally above 50°C, contained bacteriochlorophyll g, and lacked intracytoplasmic membranes. All isolates were strict anaerobes and grew best as photoheterotrophs, although chemotrophic dark growth on pyruvate was also possible. These thermophilic heliobacteria were diazotrophic and fixed N2 up to their growth temperature limit of 56°C. Phylogenetic studies showed the new isolates to be specific relatives of Heliobacterium gestii and, as has been found in H. gestii, they produce heat-resistant endospores. The unique assemblage of properties found in these thermophilic heliobacteria implicate them as a new species of this group, and we describe them herein as a new species of the genus Heliobacterium, Heliobacterium modesticaldum.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00393378
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Thermotoga maritima sp. nov. represents a new genus of unique extremely thermophilic eubacteria growing up to 90°C (1986)
    Springer
    Archives of microbiology 144 (1986), S. 324-333 
    Details
    ISSN: 1432-072X
    Keywords: Evolution ; Eubacteria ; Thermophile ; Anaerobe ; Thermotoga maritima
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A novel type of bacterium has been isolated from various geothermally heated locales on the sea floor. The organisms are strictly anaerobic, rod-shaped, fermentative, extremely thermophilic and grow between 55 and 90°C with an optimum of around 80°C. Cells show a unique sheath-like structure and monotrichous flagellation. By 16S rRNA sequencing they clearly belong to the eubacteria, although no close relationship to any known group could be detected. The majority of their lipids appear to be unique in structure among the eubacteria. Isolate MSB8 is described as Thermotoga maritima, representing the new genus Thermotoga.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00409880
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Heliobacterium modesticaldum, sp. nov., a thermophilic heliobacterium of hot springs and volcanic soils (1995)
    Springer
    Archives of microbiology 163 (1995), S. 259-267 
    Details
    ISSN: 1432-072X
    Keywords: Anoxygenic phototrophic bacteria ; Heliobacteria ; Heliobacterium modesticaldum ; Thermophily ; Hot springs ; Phylogeny
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Enrichment cultures for heliobacteria at 50°C yielded several strains of a thermophilic heliobacterium species from Yellowstone hot spring microbial mats and volcanic soils from Iceland. The novel organisms grew optimally above 50°C, contained bacteriochlorophyll g, and lacked intracytoplasmic membranes. All isolates were strict anaerobes and grew best as photoheterotrophs, although chemotrophic dark growth on pyruvate was also possible. These thermophilic heliobacteria were diazotrophic and fixed N2 up to their growth temperature limit of 56°C. Phylogenetic studies showed the new isolates to be specific relatives of Heliobacterium gestii and, as has been found in H. gestii, they produce heat-resistant endospores. The unique assemblage of properties found in these thermophilic heliobacteria implicate them as a new species of this group, and we describe them herein as a new species of the genus Heliobacterium, Heliobacterium modesticaldum.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00393378
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Fervidobacterium islandicum sp. nov., a new extremely thermophilic eubacterium belonging to the “Thermotogales” (1990)
    Springer
    Archives of microbiology 154 (1990), S. 105-111 
    Details
    ISSN: 1432-072X
    Keywords: Eubacterium ; Thermophile ; Evolution ; Fervidobacterium ; Lipids ; Thermotoga
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract An extremely thermophilic anaerobic fermentative eubacterium growing at temperatures between 50 and 80°C (opt.: 65°C) was isolated from an Icelandic hot spring. The cells were Gram-negative motile rods, about 1.8 μm in length, and 0.6 μm in width occurring singly and in pairs. About 50% of the cells formed large spheroids at one end similar to Fervidobacterium nodosum. The new isolate H 21 differed from Fervidobacterium nodosum by a 6 mol % higher GC-content of its DNA (41 mol %), its ability to grow on cellulose, and insignificant DNA homology. The lipids of isolate H 21 were similar to that of members of “Thermotogales”. 16S rRNA sequencing of isolate H 21 and Fervidobacterium nodosum indicated (a) that isolate H 21 represents a new species of the genus Fervidobacterium which we name Fervidobacterium islandicum and (b) that the genus Fervidobacterium belongs to the “Thermotogales” branch.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00423318
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    Paper (German National Licenses)
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