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Title

Silphinene sesquiterpenes as model insect antifeedants

AuthorsGonzález-Coloma, Azucena ; Valencia, Fernando; Martín, Nuria; Hoffmann, Joseph J.; Hutter, Louis; Marco, J. Alberto; Reina, Matías
KeywordsSilphinene sesquiterpenes
Picrotoxinin
Thymol
GABA inhibitor
Antifeedants
Colorado potato beetle
Aphids
Issue DateJan-2002
PublisherSpringer
CitationJournal of Chemical Ecology 28(1): 117-129 (2002)
AbstractSilphinene sesquiterpenes are established chrysomelid antifeedants. In this work, nine silphinene analogs, 11β-acetoxy-5α-angeloyloxysilphinen-3-one (1), 11β-acetoxy-5α-tigloyloxysilphinen-3-one (2), 11β-acetoxy-5α-iso-butyryloxysilphinen-3-one (3), 11β-hydroxy-5α-angeloyloxysilphinen-3-one (4), 11β,5α-dihydroxysilphinen-3-one (5), 11β,5α-diacetoxysilphinen-3-one (6), 5α,11β-diisobutyryloxysilphinen-3-one (7), silphinen-3,5,11-trione (8), and O-methyl-5-epicantabrenolic acid methyl ester (10), and a presilphiperfolane sesquiterpene (9) were tested against several divergent insect species, including the lepidopteran Spodoptera littoralis, the chrysomelid Leptinotarsa decemlineata, and five aphid species, and their antifeedant effects were compared with those of picrotoxinin, a GABA-antagonist, and thymol, an allosteric modulator for insect GABA receptors. All insects tested responded to at least one silphinene analog and/or GABA antagonist. Compound 3 and thymol were effective antifeedants against all species tested except S. littoralis, with varying potencies according to their feeding ecologies. The toxicity of these compounds was species-dependent and did not correlate with their antifeedant effect.
Description13 pages, 1 figure, 2 tables.-- PMID: 11868669 [PubMed].
Publisher version (URL)http://dx.doi.org/10.1023/A:1013566919874
URIhttp://hdl.handle.net/10261/12623
DOI10.1023/A:1013566919874
ISSN0098-0331
E-ISSN1573-1561
Appears in Collections:(IPNA) Artículos
(ICA) Artículos
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