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  • 1
    Electronic Resource
    Electronic Resource
    New Iridoid Glucosides from Castilleja and Besseya: 6-Hydroxyadoxoside and 6-Isovanillylcatapol (1987)
    s.l. : American Chemical Society
    Journal of natural products 50 (1987), S. 485-489 
    Details
    ISSN: 1520-6025
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/np50051a024
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Isoflavans and a Stilbene from Wood of the Decay-Resistant Tropical Tree Diphysa robinioides (1986)
    s.l. : American Chemical Society
    Journal of natural products 49 (1986), S. 680-683 
    Details
    ISSN: 1520-6025
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/np50046a022
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Euphydryas anicia (Lepidoptera: Nymphalidae) utilization of iridoid glycosides fromCastilleja andBesseya (Scrophulariaceae) host plants (1986)
    Springer
    Journal of chemical ecology 12 (1986), S. 1459-1468 
    Details
    ISSN: 1573-1561
    Keywords: Euphydryas anicia ; Lepidoptera ; Nymphalidae ; Castilleja integra ; Besseya plantaginea ; Besseya alpina ; iridoid glycosides ; catalpol ; macfadienoside ; sequestration ; plant-insect interactions ; herbivory ; ecological chemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Iridoid glycosides were found to be sequestered by natural populations ofEuphydryas anicia after ingestion from the host plantsBesseya alpina, B. plantaginea, andCastilleja integra. Both major iridoids ofB. alpina, cataipol and aucubin, were found in butterfly populations where this was the only host plant. The catalpol-aucubin ratio was higher in the butterflies than in the host plant. AnE. anicia population which uses bothB. plantaginea andC. integra as host plants was found to sequester cataipol as well as another iridoid, macfadienoside. Macfadienoside was the major iridoid ofC. integra, while catalpol esters were the major iridoids ofB. plantaginea. Although it was a major sequestered iridoid, catalpol was a minor constituent in both host plants. The macfadienoside-catalpol ratio in the butterflies from this population was highly variable, and there appeared to be both sex and individual variation in host plant and/or iridoid glucoside utilization byE. anicia. Although other iridoids were present in the host plants, none was sequestered in more than trace amounts.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01012364
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Host plant utilization and iridoid glycoside sequestration byEuphydryas anicia (Lepidoptera: Nymphalidae) (1988)
    Springer
    Journal of chemical ecology 14 (1988), S. 2147-2168 
    Details
    ISSN: 1573-1561
    Keywords: Euphydryas anicia ; Lepidoptera ; Nymphalidae ; Castilleja integra ; Besseya plantaginea ; Besseya alpina ; Scrophulariaceae ; iridoid glycosides ; sequestration ; metabolism ; plant-insect interactions ; herbivory
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The iridoid glycoside content of individual adultEuphydryas anicia butterflies from two Colorado populations was quantitatively determined. At one site (Red Hill), larval host plants wereCastilleja integra andBesseya plantaginea, while at the other site (Cumberland Pass) a single host plant,B. alpina, was used. At Red Hill, macfadienoside and catalpol were sequestered, while at Cumberland Pass, catalpol and aucubin were sequestered. Artificial diet studies showed that larvae hydrolyzed a major iridoid ofB. plantaginea, 6-isovanilIylcatalpol, to catalpol (which was sequestered) and isovanillic acid (which was excreted). Large year-to-year and individual variation in butterfly iridoid content was established as was a female-male difference in macfadienoside vs. catalpol content. Larval host plant distributions and numbers were determined at Red Hill for two years and compared with changes in butterfly populations and sequestered iridoids.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01014022
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Iridoid glycoside sequestration by two aposematicPenstemon-feeding geometrid larvae (1988)
    Springer
    Journal of chemical ecology 14 (1988), S. 435-441 
    Details
    ISSN: 1573-1561
    Keywords: Meris alticola ; Neoterpes graefiaria ; Lepidoptera ; Geometridae ; Penstemon virgatus ; Penstemon barbatus ; Scrophulariaceae ; iridoid glycosides ; catalpol ; Müllerian mimicry ; sequestration
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The iridoid glycoside catalpol was found to be sequestered by larvae ofMeris alticola feeding onPenstemon virgatus and by larvae ofNeoterpes graefiaria which utilizeP. barbatus. The strikingly similar larval patterns of these two ennomine geometrids were previously considered to be disruptive, but predator-based Mullerian mimicry is equally likely to be involved. The cryptic adult moths generally contain only small amounts of catalpol, having left most of the bitter iridoid in the pupal case and in the meconium excreted after eclosion. OneNeoterpes female did contain considerable catalpol in the abdomen, presumably in the eggs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01013895
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    Paper (German National Licenses)
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