Patterns of bioactivity and herbivory on Nothofagus species from Chile and New Zealand
Author
dc.contributor.author
Russell, G. B.
Author
dc.contributor.author
Bowers, W. S.
Author
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Keesing, V.
Author
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Niemeyer, H. M.
Author
dc.contributor.author
Sevenet, T.
Author
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Vasanthaverni, S.
Author
dc.contributor.author
Wratten, S. D.
Admission date
dc.date.accessioned
2018-12-20T14:28:45Z
Available date
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2018-12-20T14:28:45Z
Publication date
dc.date.issued
2000
Cita de ítem
dc.identifier.citation
Journal of Chemical Ecology, Volumen 26, Issue 1, 2018, Pages 41-56
Identifier
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00980331
Identifier
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10.1023/A:1005433326418
Identifier
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https://repositorio.uchile.cl/handle/2250/156133
Abstract
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Nothofagus species from Chile and New Zealand were surveyed in the field for invertebrate abundance and leaf feeding damage and in the laboratory for antifeedant activity against leafrollers (Ctenopsteustis obliquana, Epiphyas postvittana), deterrent activity against pea aphid (Acyrthosiphon pisum), insect growth regulatory activity (Oncopeltus fasciatus), nematicidal activity (Caenorhabditis elegans), antibiotic activity (Pseudomonas solanaciarium), and general toxicity. A data matrix indicated that N. alessandri and N. pumilio most likely have a chemical barrier to insect attack as leaves showed low faunal abundance, low herbivory, and activity in the leafroller antifeedant, aphid deterrent, and nematicidal assays. A chemical examination of N. alessandri that used the leafroller antifeedant test to guide the separation yielded an active fraction containing the flavonoid, galangin, and the stilbene, pinosylvin, which appear to act in concert to deter leafroller feeding. The discovery