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  • 1
    Electronic Resource
    Electronic Resource
    The feeding behaviour of Schistocerca gregaria, the desert locust, on two starch mutants of Arabidopsis thaliana (2000)
    Springer
    Chemoecology 10 (2000), S. 59-67 
    Details
    ISSN: 1423-0445
    Keywords: Key words.Arabidopsis thaliana–Schistocerca gregaria– nutritional rails – feeding behaviour – starch mutants
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary. Schistocerca gregaria, the desert locust, has been shown to regulate its dietary intake with respect to specific macronutrients in synthetic foods. This study examined the nutrients in the leaves of two starch mutants of Arabidopsis thaliana, and then compared the feeding behaviour of locusts on the two starch mutants. The high-starch mutant had c. 25 times more starch than the no-starch mutant. Newly molted 5th stadium locusts were preconditioned for 3 days on one of the mutants, and then observed for 90 min while exposed to the same or the alternative mutant. Locusts pretreated with the no-starch mutant fed longer during the first meal on high-starch mutants, spent more time feeding, and had the smaller latency to begin a meal when compared to the locusts pretreated on the high-starch mutant. The results of the study are interpreted in light of an integrative model of nutrient balancing.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s000490050009
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Cyanoglycoside gynocardin fromAcraea horta (L.) (Lepidoptera: Acraeinae) (1989)
    Springer
    Journal of chemical ecology 15 (1989), S. 2177-2189 
    Details
    ISSN: 1573-1561
    Keywords: Acraea horta ; Lepidoptera ; Acraeinae ; cyclopentenyl cyanoglycoside ; gynocardin ; Kiggelaria africana ; sequestration ; evolution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract All stages in the life cycle ofAcraea horta (L.) (Lepidoptera: Acraeinae) were found to release hydrogen cyanide (HCN) from their crushed tissues, and the source of cyanogenesis was present in the hemolymph of adults and larvae. Comparison with standards on thin-layer chromatograms (TLC) revealed the presence in adults of gynocardin, a cyclopentenyl cyanoglycoside also produced by the larval food plant,Kiggelaria africana L. (Flacourtiaceae). Analysis of adults reared on plant species (Passifloraceae) containing gynocardin and/or other cyanoglycosides suggested selective uptake of gynocardin by the larvae. This is the first demonstration of a cyanoglycoside, other than the acyclic linamarin and lotaustralin, occurring in Lepidoptera and the first evidence for the storage byAcraea butterflies of a plant-produced allelochemical. Possible implications for the understanding of the evolution of acraeine host choice are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01014108
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    Paper (German National Licenses)
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