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  • Articles  (92)
  • 2015-2019  (18)
  • 2010-2014  (23)
  • 1980-1984  (33)
  • 1975-1979  (18)
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  • 1
    Electronic Resource
    Electronic Resource
    Soil Anaerobiosis, Microorganisms, and Root Function (1980)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Phytopathology 18 (1980), S. 37-66 
    Details
    ISSN: 0066-4286
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.py.18.090180.000345
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  • 2
    Electronic Resource
    Electronic Resource
    Effects of organic acids on the germination of seeds and growth of seedlings (1980)
    Oxford, UK : Blackwell Publishing Ltd
    Plant, cell & environment 3 (1980), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract A range of aliphatic, aromatic and amino acids at a concentration of 5 mol m-3 inhibited the extension of roots of barley seedlings. Acetic acid is one of the least toxic but its action has the greatest ecological significance because it can be formed in phytotoxic concentrations by micro-organisms in soil. Its uptake and toxicity were greatest at low pH. Of the plant species which were examined, those most affected were barley, wheat and maize, followed by rape and clover. In aerobic conditions, microbial breakdown of the acid decreased its activity, but in atmospheres containing small concentrations of oxygen the acid prevented the germination of seeds. The toxicity could be partially alleviated by calcium carbonate applied as ground chalk to seeds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/1365-3040.ep11581824
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  • 3
    Electronic Resource
    Electronic Resource
    Studies of Salvia reflexa Hornem. I. Possible competitive mechanisms (1979)
    Oxford, UK : Blackwell Publishing Ltd
    Weed research 19 (1979), S. 0 
    Details
    ISSN: 1365-3180
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: When grown in mixtures with equal numbers of wheat plants Satvia reflexa was found not to be a strong competitor. The height and inflorescence dry weight of wheat was increased by watering the mixtures from above ihe foliage. These effects were accentuated by moisture stress. Aqueous leachatcs oi S. refiexa foliage were found (o inhibit the germination and/or early growth of wheat grown on filter paper in petri dishes and in different soil lypes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3180.1979.tb01550.x
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  • 4
    Electronic Resource
    Electronic Resource
    The effect of bacterial fermentation of couch grass rhizomes and Fusarium culmorum on the growth of barley seedlings (1982)
    Oxford, UK : Blackwell Publishing Ltd
    Plant pathology 31 (1982), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Phytotoxic concentrations of acetic acid were found in extracts of decaying rhizomes of couch grass (Agropyron repens) kept in sand at different moisture levels. Leaf extension of barley seedlings was inhibited by inoculating the radicles before planting with Fusarium culmorum and this inhibition was increased by 5 mM acetic acid. Seed dressings of benomyl and thiram alleviated the inhibition of leaf growth of seedlings grown in sand containing rhizomes inoculated with F. culmorum.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3059.1982.tb02810.x
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  • 5
    Electronic Resource
    Electronic Resource
    Ethylene in soil (1975)
    [s.l.] : Nature Publishing Group
    Nature 256 (1975), S. 576-577 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Using previously described techniques8 we have confirmed earlier reports that heat8 and even autoclaving9 can stimulate the production of ethylene by soils (Table 1). The effect of heat at 100 C on the release of ethylene from pure cultures of M. hiemalis was therefore investigated. No ethylene was ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/256576a0
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  • 6
    Electronic Resource
    Electronic Resource
    Associative cellulolysis and dinitrogen fixation by co-cultures of Trichoderma harzianum and Clostridium butyricum (1984)
    [s.l.] : Nature Publishing Group
    Nature 310 (1984), S. 695-697 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Complex materials such as plant residues require a variety of enzymes for their complete degradation which in natural environments is usually provided by mixed microbial communities. Communities with both cellulase and nitrogenase functions are often associated with the degradation of cellulosic ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/310695a0
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  • 7
    Electronic Resource
    Electronic Resource
    Measurement of the microbial biomass in intact cores of soil (1981)
    Springer
    Microbial ecology 7 (1981), S. 229-234 
    Details
    ISSN: 1432-184X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The fumigation/respiration technique was used to estimate the size of the soil microbial biomass. Sieving decreased the biomass in winter but increased it in summer; we suggest that this was a consequence of the different substrates available and the different microbial populations during the year. The flush in respiration following fumigation correlated significantly with the CO2-C produced 10 days after fumigation (X), so that in the soils studied by us the biomass (B) can be calculated from Bk=0.673X−3.53, wherek is the fraction of fumigated organisms mineralized to CO2, thus avoiding the need to measure CO2 production from unfumigated cores.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02010305
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  • 8
    Electronic Resource
    Electronic Resource
    The role of water-soluble components in phytotoxicity from decomposing straw (1982)
    Springer
    Plant and soil 65 (1982), S. 11-17 
    Details
    ISSN: 1573-5036
    Keywords: Acetic acid ; Hot water-soluble components ; Phytotoxins ; Straw
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary When seedling development is slowed by the presence of straw in wet seed-beds both microbial products and compounds of plant origin contribute to phytotoxicity. Hot (100°C) water-soluble extracts from fresh straw contained phytotoxic substances but these accounted for less of the phytotoxicity than the microbial products, primarily acetic acid, from anaerobic fermentation of the insoluble straw polysaccharides (cellulose and hemicelluloses). The water-soluble components however also included mineral salts required in the decomposition of these polysaccharides.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02376798
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  • 9
    Electronic Resource
    Electronic Resource
    The relative roles of micro-organisms and their metabolites in the phytotoxicity of decomposing plant residues (1983)
    Springer
    Plant and soil 74 (1983), S. 457-459 
    Details
    ISSN: 1573-5036
    Keywords: Barley ; Metabolites ; Micro-organisms ; Phytotoxicity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Anaerobically decomposed wheat straw inhibited barley (Hordeum distichon) seedling root growth. By contrast, aerobic degradation of leaves of sweet vernal grass (Anthroxanthum odoratum) stimulated growth. Separation of the associated micro-organisms from their metabolites showed the effect to be largely chemical. However the isolated micro-organisms sometimes exerted a direct effect on seedling growth and this possibility should be taken into account when interpreting the results of experiments on effects of decomposing plant residues on plant growth.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02181363
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  • 10
    Electronic Resource
    Electronic Resource
    Effects of some non-pathogenic micro-organisms on the growth of gnotobiotic barley plants (1977)
    Springer
    Plant and soil 47 (1977), S. 161-170 
    Details
    ISSN: 1573-5036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Mated cultures of Blakeslea trispora, which produce trisporic acid, inhibited root and shoot extension of barley plants grown in gnotobiotic cultures, where the carbon from roots was the sole source of carbon available to the microorganism. Unmated cultures of B. trispora and Mucor hiemalis, which do not synthesize trisporic acid, inhibited root extension only. Azotobacter chroococcum had a variable effect in different experiments on both root and shoot extension but could at least partially relieve the inhibitory effect of B. trispora on root growth. Plant growth regulators, applied to roots exogenously, produced effects on plants which, although comparable with some of the inhibitory effects of the micro-organisms, were not comparable with the stimulatory effects of A. chroococcum. re]19751127
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00010377
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