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  • 1
    Electronic Resource
    Electronic Resource
    Mushroom chemical defense (1983)
    Springer
    Journal of chemical ecology 9 (1983), S. 1439-1447 
    Details
    ISSN: 1573-1561
    Keywords: Tricholomataceae ; Lentinellus ursinus ; sesquiterpene ; antifeedant ; bioassay ; isovelleral ; mushrooms ; opossum ; Didelphis virginiana ; pungency ; dialdehyde
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract A new bioassay employing a natural fungivore, the opossumDidelphis virginiana, is described. Using this bioasssay, eighteen species of fungi were tested for palatability. Five species of mushrooms, all of which taste pungent to humans, were found to be unpalatable to the opossum. From the least palatable of these,Lentinellus ursinus, the pungent principle was isolated and identified as isovelleral, a previously described fungal metabolite. The compound was shown to be a potent antifeedant to opossums. By means of difference NOE and relaxation time NMR studies, the relative configuration and solution conformation of isovelleral were deduced.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00990749
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Necrodols: Anti-insectan terpenes from defensive secretion of carrion beetle (Necrodes surinamensis) (1986)
    Springer
    Journal of chemical ecology 12 (1986), S. 1407-1415 
    Details
    ISSN: 1573-1561
    Keywords: Coleoptera ; Silphidae ; Necrodes surinamensis ; carrion beetle ; monoterpenes ; iridoids ; necrodols ; defensive secretion ; insect repellent ; insect irritant ; bioassay
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Two compounds recently isolated from the defensive gland ofNecrodes surinamensis, α-and β-necrodol, first representatives of a new category of monoterpenes (the necrodanes), are shown to be repellent to ants and other insects and irritating to cockroaches and flies. The compounds doubtless play a defensive role inNecrodes. The possible long-range applied significance of research on insect repellents is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01012360
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Antifeedant action ofZ-dihydromatricaria acid from soldier beetles (Chauliognathus spp.) (1981)
    Springer
    Journal of chemical ecology 7 (1981), S. 1149-1158 
    Details
    ISSN: 1573-1561
    Keywords: Dihydromatricaria acid ; antifeedant ; acetylenic acid ; Chauliognathus pennsylvanicus ; Coleoptera ; Cantharidae ; soldier beetles ; Phidippus ; jumping spider ; bioassay ; defensive secretion ; defensive behavior
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The acetylenic acid,Z-dihydromatricaria acid (DHMA), previously isolated from the defensive secretion ofChauliognathus lecontei, and now shown to occur also inC. pennsylvanicus, is a potent feeding deterrent to jumping spiders (Phidippus spp.). A simple bioassay withPhidippus is described, which is generally applicable to studies dealing with the isolation and evaluation of feeding deterrency of natural products from insects. By use of this assay,Phidippus were shown to be sensitive to as little as 1 μg DHMA, an amount equivalent to less than 2% of the DHMA content ofC. pennsylvanicus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00987634
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  • 4
    Electronic Resource
    Electronic Resource
    Chemical defense of a rove beetle (Creophilus maxillosus) (1983)
    Springer
    Journal of chemical ecology 9 (1983), S. 159-180 
    Details
    ISSN: 1573-1561
    Keywords: Coleoptera ; Staphylinidae ; Creophilus maxillosus ; defensive secretion ; ant repellent ; bioassay ; isoamyl acetate ; isoamyl alcohol ; iridodial ; actinidine ; dihydronepetalactone ; (E)-8-oxocitronellyl acetate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The abdominal defensive glands ofC. maxillosus secrete a mixture (70μg/beetle) of isoamyl alcohol (I), isoamyl acetate (II), iridodial (III), actinidine (IV), dihydronepetalactone (VE), and (E)-8-oxocitronellyl acetate (X). When disturbed, the beetle everts the glands and revolves the abdomen so as to wipe the glands against the offending agent. Fecal fluid is commonly emitted at the same time and may become added to the glandular material. Ants (Formica exsectoides) are effectively fended off by the beetle and were shown in bioassays (Monomorium destructor) to be repelled by the four major components of the secretion (II, III, X, VE); the principal component (VE) was the most active. Some anatomical features of the glands are described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00987779
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    Paper (German National Licenses)
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