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  • 1
    Electronic Resource
    Electronic Resource
    Rhizomorph Formation in Fungi I. Stimulation by Ethanol and Acetate and Inhibition by Disul-firam of Growth and Rhizomorph Formation in Armillaria mellea (1972)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 26 (1972), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Rhizomorph formation in Armillaria mellea (Vahl ex Fr.) Quél. has been studied on a synthetic glucose medium with ethanol and acetate as inducers. Disulfiram (antabuse) inhibited growth and rhizomorph formation when ethanol was the inducer, while the stimulating effect of acetate was unaffected. This indicates that ethanol is metabolised by the normal pathway via acetate.Growth, ethanol- and glucose uptake were measured as a function of time. Ethanol was used up in 12 days; after that, growth and glucose uptake declined. A further supply of ethanol gave a significant increase in the growth rate. The results show that ethanol is a limiting growth factor during the entire growth period.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1972.tb01125.x
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  • 2
    Electronic Resource
    Electronic Resource
    Changes of Exponential Growth Rates in Relation to Differentiation of Geotrichum candidum in Submerged Culture (1976)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 38 (1976), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Growth and differentiation of the imperfect fungus Geotrichum candidum were followed in submerged cultures containing a simple synthetic glucose salt medium. Uptake of glucose, ammonium and oxygen from the medium were measured during the entire growth perod. In 0.1% glucose the fungus grows with one exponential growth phase until all the glucose has been consumed. The arthrospores are formed in the stationary phase. In 0.5% glucose the growth curve has two exponential growth phases, one with a doubling time of 1.8 h and a second one with a doubling time of 4.9 h. The second exponential growth phase, which starts when less than 15% of the glucose and less than 30% of the ammonium have been consumed, is shown to be the sporulation phase. During this growth phase the oxygen saturation in the culture remained constant at about 50%.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1976.tb04849.x
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  • 3
    Electronic Resource
    Electronic Resource
    Rhizomorph Formation in Fungi III. The Effect of Ethanol on the Synthesis of DNA and RNA and Uptake of Asparagine and Phosphate in Armillaria mellea (1973)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 29 (1973), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Growth and rhizomorph formation in Armillaria mellea (Vahl ex Fr.) Quél. can be stimulated by ethanol when grown on a synthetic glucose medium. The content of DNA (deoxy-ribonucleic acid) and RNA (ribonucleic acid) in cultures of A. mellea have been followed during a growth period in relation to growth (dry weight) and ethanol uptake with 3 different initial ethanol concentrations. The continuous increase in dry weight as well as DNA and RNA contents during growth showed similar exponential rates as long as ethanol was present in the medium. The final amounts were proportional to the initial ethanol concentration.A further supply of ethanol caused a similar proportional increase in dry weight and also in the DNA and RNA contents, which indicates that the growth stimulated by ethanol is caused by cell divisions rather than an accumulation of lipids or polysaccharides. Uptake of asparagine and phosphate were also stimulated by ethanol.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1973.tb04823.x
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  • 4
    Electronic Resource
    Electronic Resource
    Rhizomorph Formation in Fungi (1973)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 28 (1973), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The effect on growth and rhizomorph formation of 12 alcohols (methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, iso-butyl alcohol, tert-butyl alcohol, 1-pentanol, iso-amyl alcohol, ethylene glycol and glycerol) at different concentrations has been examined for 2 isolates of Armillaria mellea (Vahl ex Fr.) Quél. and 1 of Clitocybe geotropa (Bull. ex Fr.) Quél. The fungi were cultivated for 28 days on a synthetic, liquid glucose medium with the alcohols as supplement.The following alcohols strongly stimulated growth and rhizomorph formation: ethanol, 1-propanol and 1-butanol. A great variation was demonstrated between the isolates in relation to rhizomorph production, morphology, and ability to be stimulated by different alcohols.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1973.tb01149.x
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  • 5
    Electronic Resource
    Electronic Resource
    Sporulation and the Macromolecular Composition of the Mycelium and Arthrospores of Geotrichum candidum (1978)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 42 (1978), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: In submerged culture the mycelium of Geotrichum candidum breaks into fragments (arthrospores) which are either cylindrical or ellipsoidal in shape; the proportion of each spore type depends upon the glucose concentration in the medium. Above 0.2% glucose the ellipsoidal type prevails, whereas the cylindrical type is more abundant at lower glucose concentrations. The cylindrical spores and the mycelium have a very similar macromolecular composition, but the ellipsoidal spores have less RNA and protein and more carbohydrate than the mycelium.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1978.tb04095.x
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  • 6
    Electronic Resource
    Electronic Resource
    Lake Søbygaard: a shallow lake in recovery after a reduction in phosphorus loading (1987)
    Springer
    GeoJournal 14 (1987), S. 381-384 
    Details
    ISSN: 1572-9893
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography
    Notes: Abstract The development and recovery of a shallow and hypertrophic lake following a reduction in the external phosphorus load has been documented. In spite of this reduction, phosphorus concentrations and phytoplankton biomass in the lake water are still very high. The reason for this development can be explained by three main factors: (1): the sediment has been accumulating a large phosphorus pool which is now causing a high internal phosphorus load, (2) due to the shallow conditions, resuspension of the upper sediment often takes place because of wind action and thereby increases the phosphorus loading from the sediment, (3) the development of a large population of planktivorous fish decreases the zooplankton biomass resulting in the development of a large phytoplankton biomass.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00208216
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