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  • 1
    Electronic Resource
    Electronic Resource
    Feeding deterrency of some 4-hydroxycoumarins and related compounds: Relationship to host-plant resistance of alfalfa towards pea aphid (Acyrthosiphon pisum) (1987)
    Springer
    Journal of chemical ecology 13 (1987), S. 925-930 
    Details
    ISSN: 1573-1561
    Keywords: Medicago saliva ; alfalfa ; Acyrthosiphon pisum ; pea aphid ; Homoptera ; Aphididae ; host-plant resistance ; phytoalexin ; 4-hydroxycoumarins ; coumestrol ; symbiotes ; feeding deterrency
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract A series of 3-acyl-4-hydroxycoumarins, structurally related to dicoumarol, as well as several alfalfa constituents including coumestrol were tested for their feeding deterrency towards the pea aphid. Feeding deterrency of the 3-acyl-4-hydroxycoumarins decreased as the size of the 3-acyl group increased.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01020171
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  • 2
    Electronic Resource
    Electronic Resource
    Honeydew analysis for detecting phloem transport of plant natural products (1990)
    Springer
    Journal of chemical ecology 16 (1990), S. 1899-1909 
    Details
    ISSN: 1573-1561
    Keywords: Castanospermum australe ; Moreton Bay chestnut ; Senecio vulgaris ; groundsel ; Pseudococcus longispinus ; mealybug ; aphid ; Schizaphis graminum ; greenbug ; Myzus persicae ; green peach aphid ; Aphis nerii ; oleander aphid ; Homoptera ; Aphididae ; Coccidae ; phloem transport ; honeydew ; indolizidine ; pyrrolizidine alkaloid ; gramine ; DIMBOA ; cardenolide
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Analysis of honeydew excreted by various sap-sucking insects indicated the presence of certain plant secondary constituents in the phloem of their host plants. Honeydew excreted by mealybugs (Pseudococcus longispinus), living onCastanospermum australe, contained the indolizidine alkaloid castanospermine, a potent β-glucosidase inhibitor. Similarly, honeydew from green peach aphids (Myzus persicae), feeding onSenecio vulgaris flower buds, contained the pyrrolizidine alkaloid senecionine, itsN-oxide, and hydrolytic products including retronecine. Cardenolides were detected in the honeydew of oleander aphids (Aphis nerii) feeding on oleander (Nerium oleander), indicating that these compounds are translocated in the phloem. On the other hand, honeydew from greenbugs (Schizaphis graminum), feeding on barley, lacked gramine or related indole metabolites. Similarly MBOA, the breakdown product of DIMBOA, was not detected in the honeydew of greenbugs living on DIMBOA-containing wheat.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01020503
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    Paper (German National Licenses)
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