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  • 1
    Electronic Resource
    Electronic Resource
    Allelopathy, chemical communication, and plant defense (1989)
    Springer
    Journal of chemical ecology 15 (1989), S. 1193-1202 
    Details
    ISSN: 1573-1561
    Keywords: Allelopathy ; allelochemicals ; mitochondria ; phagocytosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Allelopathy is identified particularly with chemical activity between plants; entomologists refer to allelochemicals in a broader context. Recent work shows that several groups of compounds associated with allelopathy also play a part in communication between plants and other organisms. It is argued that such communication is part of the similarities in plant and animal responses to stress and may contribute to plant defense.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01014822
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Activity of allelochemicals ofDatura stramonium L. (Thorn-apple) in contrasting soil types (1984)
    Springer
    Plant and soil 79 (1984), S. 181-189 
    Details
    ISSN: 1573-5036
    Keywords: Allelopathy ; Black earth ; Datura stramonium ; Lateritic podzolic ; Tropane alkaloids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Alkaloids washed from the seeds ofDatura stramonium inhibited the early gowth ofHelianthus annuus in Black Earth and Lateritic Podzolic soils. Under laboratory conditions, the magnitude of the inhibition was greater in the Lateritic Podzolic than the Black Earth soil. Phytotoxicity ofD. stramonium alkaloids persisted for 20 weeks in Lateritic Podzolic soil under controlled conditions, and for eight months in aD. stramonium-infested Black Earth soil in the field.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02182340
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Biologically active secondary metabolites of barley. II. Phytotoxicity of barley allelochemicals (1993)
    Springer
    Journal of chemical ecology 19 (1993), S. 2231-2244 
    Details
    ISSN: 1573-1561
    Keywords: Allelopathy ; allelochemicals ; phytotoxin ; gramine ; hordenine ; HPLC ; TEM ; micrograph ; autophagy ; barley ; Hordeum vulgare ; Sinapis alba
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The release of alkaloids by barley was quantified by HPLC. Hordenine was released from the roots of barley in a hydroponic system for up to 60 days. The amount reached a maximum, 2μg/plant/day, at 36 days, then declined. Effects on white mustard by hordenine and gramine included reduction of radicle length and apparent reduction in health and vigor of radicle tips. Transmission electron microscopic examination of white mustard radicle tips exposed to hordenine and gramine showed damage to cell walls, increase in both size and number of vacuoles, autophagy, and disorganization of organelles. The evidence of the morphological and primary effects of barley allelochemicals at the levels released by living plants indicates that the biologically active secondary metabolites of barley may lead to a significant role in selfdefense by the crop.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00979660
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Mathematical modeling of allelopathy: Biological response to allelochemicals and its interpretation (1993)
    Springer
    Journal of chemical ecology 19 (1993), S. 2379-2388 
    Details
    ISSN: 1573-1561
    Keywords: Allelopathy ; allelochemicals ; mathematical model ; plant defense
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Allelochemicals are assumed to possess specific biological properties and responses of an organism are external expressions of such properties. Based on this assumption, a mathematical model has been constructed to interpret the characteristic responses of an organism to allelochemicals. Several sets of experimental data have been compared with the model predictions; good agreement between the model and data is observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00979671
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  • 5
    Electronic Resource
    Electronic Resource
    Biologically active secondary metabolites of barley. I. Developing techniques and assessing allelopathy in barley (1993)
    Springer
    Journal of chemical ecology 19 (1993), S. 2217-2230 
    Details
    ISSN: 1573-1561
    Keywords: Allelopathy ; germination ; bioassay ; siphoning apparatus ; hydroponics ; stairstep assay ; barley ; Hordeum vulgare ; Sinapis alba
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Allelopathic effects of barley (Hordeum vulgare L.) on white mustard (Sinapis alba L.) were assessed using modified bioassays that reduced other environmental influences. In a Petri dish bioassay, germination of white mustard was delayed and the radicle lengths were significantly inhibited at a density of 0.5 barley seed/cm2. In a ‘siphoning’ bioassay apparatus, when the two species were sown together, radicle elongation of white mustard was not inhibited one day after sowing but became increasingly inhibited as bioassay time increased. Barley allelochemicals were released from the roots in a hydroponic system for at least 70 days after commencement of barley germination. Solutions removed from the hydroponic system of growing barley delayed germination and inhibited growth of white mustard. The allelopathic activity of barley was further confirmed at a density of 0.3 barley seed/cm2 in a modified stairstep apparatus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00979659
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Primary effects of allelochemicals ofDatura stramonium L. (1987)
    Springer
    Plant and soil 98 (1987), S. 137-144 
    Details
    ISSN: 1573-5036
    Keywords: Allelopathy ; Datura stramonium ; Tropane alkaloids ; Alpha-amylase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Alkaloids leached from seed ofDatura stramonium were identified as scopolamine and hyoscyamine and levels leached from seed over a seven day period were quantified. Scopolamine is known to inhibit early seedling growth of some crop plants. The hypothesis that such inhibition results from interference with gibberellin-stimulated food reserve metabolism in germinating seedlings was tested, using barley and wheat in bioassays. Seedling growth of both cereals was inhibited by scopolamine but no evidence of interference with responses to gibberellins was obtained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02381734
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    Paper (German National Licenses)
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