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  • Endosymbiosis  (2)
  • fungicide resistance  (1)
  • 1980-1984  (3)
  • 1955-1959
  • 1
    Electronic Resource
    Electronic Resource
    Symbiosis of methanogenic bacteria and sapropelic protozoa (1983)
    Springer
    Archives of microbiology 136 (1983), S. 89-95 
    Details
    ISSN: 1432-072X
    Keywords: Coenzyme F420 ; Compound F342 ; Endosymbiosis ; Interspecies H2-transfer ; Methane production ; Methanogenic bacteria ; Metopus striatus ; Pelomyxa palustris ; Sapropelic protozoa-Urkaryotes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Fluorescent bacteria were demonstrated to be abundantly spread as single cells throughout the cytoplasm of the giant amoeba Pelomyxa palustris, the sapropelic ciliate Metopus striatus and six other anaerobic protozoa examined. The endosymbionts of P. palustris and M. striatus were identified as methanogenic bacteria on the basis of the presence of the deazaflavin coenzyme F420 and the pterin compound F342. Moreover individuals of P. palustris produced methane over a long period of incubation. The number of methanogenic bacteria was above 1010 cells/ml protozoal cytoplasm. Two types of methanogenic bacteria together with unidentified thick bacteria were found in P. palustris. The physiological background of this endosymbiosis and its functioning in degradation processes in the anoxic environment are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00404779
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  • 2
    Electronic Resource
    Electronic Resource
    Methanobacterium formicicum, an endosymbiont of the anaerobic ciliateMetopus striatus McMurrich (1984)
    Springer
    Archives of microbiology 139 (1984), S. 1-7 
    Details
    ISSN: 1432-072X
    Keywords: Endosymbiosis ; Hydrogenosome ; Methanobacterium formicicum ; Methanogenic bacteria ; Metopus striatus ; Sapropelic protozoa
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The Gram-positive methanogenic endosymbiont of the sapropelic ciliateMetopus striatus was isolated and identified asMethanobacterium formicicum. In the ciliate cell the methanogens are in close association with microbody-like organelles. No mitochondria could be detected. The nature of the microbodies and the physiological background of the observed association are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00692703
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  • 3
    Electronic Resource
    Electronic Resource
    Resistance in Rhizoctonia solani to tolclofos-methyl (1984)
    Springer
    European journal of plant pathology 90 (1984), S. 95-106 
    Details
    ISSN: 1573-8469
    Keywords: fungicide resistance ; Rizolex ; stable resistance ; fitness ; pathogenicity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Samenvatting Na overenting op een medium dat tolchlofos-methyl bevatte, raakten enkele isolaten vanRhizoctonia solani gewend aan 500 maal de dosis die oorspronkelijk bijna alle groei verhinderde. Resistente isolaten vanR. solani bleven minder gevoelig voor tolchlofos-methyl na vijf overentingen op een medium zonder het fungicide. De pathogeniteit van resistente isolaten was niet verminderd, maar hun groeisnelheid op PDA was significant vertraagd vergeleken bij die van de oorspronkelijke isolaten. Isolatie van de resistente stammen werd niet verbeterd op een selectief medium waaraan tolchlofos-methyl was toegevoegd.
    Notes: Abstract Isolates ofRhizoctonia solani were adapted in vitro to grow on a medium amended with tolclofos-methyl at a concentration 500 times that which initially almost completely inhibited growth. Acquired resistance was retained after five transfers on a fungicide-free medium. Pathogenicity of resistant isolates was not reduced, but their growth rates on PDA were significantly lower than those of the original isolates. Recovery of the resistant isolates was not improved on a selective medium amended with tolclofos-methyl.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01994514
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