A free lunch? No cost for acquiring defensive plant pyrrolizidine alkaloids in a specialist arctiid moth (Utetheisa ornatrix)

dc.creatorCogni, R
dc.creatorTrigo, JR
dc.creatorFutuyma, DJ
dc.date2012
dc.dateDEC
dc.date2014-08-01T12:54:21Z
dc.date2015-11-26T16:46:56Z
dc.date2014-08-01T12:54:21Z
dc.date2015-11-26T16:46:56Z
dc.date.accessioned2018-03-28T23:32:55Z
dc.date.available2018-03-28T23:32:55Z
dc.identifierMolecular Ecology. Wiley-blackwell, v. 21, n. 24, n. 6152, n. 6162, 2012.
dc.identifier0962-1083
dc.identifierWOS:000312147300018
dc.identifier10.1111/mec.12086
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/75837
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/75837
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1274685
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionMany herbivorous insects sequester defensive chemicals from their host plants. We tested sequestration fitness costs in the specialist moth Utetheisa ornatrix (Lepidoptera: Arctiidae). We added pyrrolizidine alkaloids (PAs) to an artificial diet at different concentrations. Of all the larval and adult fitness components measured, only development time was negatively affected by PA concentration. These results were repeated under stressful laboratory conditions. On the other hand, the amount of PAs sequestered greatly increased with the diet PA concentration. Absence of a detectable negative effect does not necessarily imply a lack of costs if all individuals express the biochemical machinery of detoxification and sequestration constitutively. Therefore, we used qPCR to show that expression of the gene used to detoxify PAs, pyrrolizidine-alkaloid-N-oxygenase (pno), increased 41-fold in our highest PA treatment. Nevertheless, fitness components were affected only slightly or not at all, suggesting that sequestration in this species does not incur a strong cost. The apparent lack of costs has important implications for our understanding of the evolution of ecological interactions; for example, it implies that selection by specialist herbivores may decrease the levels of certain chemical defences in plant populations.
dc.description21
dc.description24
dc.description6152
dc.description6162
dc.descriptionNSF [DEB 0807418]
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionNSF [DEB 0807418]
dc.descriptionCNPq [98/01065-7, 304969/2006-0]
dc.languageen
dc.publisherWiley-blackwell
dc.publisherHoboken
dc.publisherEUA
dc.relationMolecular Ecology
dc.relationMol. Ecol.
dc.rightsfechado
dc.rightshttp://olabout.wiley.com/WileyCDA/Section/id-406071.html
dc.sourceWeb of Science
dc.subjectadaptation
dc.subjectarms-races
dc.subjectco-evolution
dc.subjectfitness costs
dc.subjectplant-herbivore interaction
dc.subjectspecialization
dc.subjectGeneralist Herbivores
dc.subjectPapilio Polyxenes
dc.subjectChemical Defense
dc.subjectNatural Enemies
dc.subjectTrophic Levels
dc.subjectLepidoptera
dc.subjectResistance
dc.subjectSequestration
dc.subjectSelection
dc.subjectHost
dc.titleA free lunch? No cost for acquiring defensive plant pyrrolizidine alkaloids in a specialist arctiid moth (Utetheisa ornatrix)
dc.typeArtículos de revistas


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