Swallowtail
Mostrando 1-7 de 7 artigos, teses e dissertações.
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1. Ocorrência, diversidade e recursos alimentares de Papilionidae (Lepidoptera) no Sul do Brasil / Occurrence, diversity and food resources of papilionidae (Lepidoptera) in southern Brazil
Este trabalho visou sintetizar dados sobre Papilionidade de estudos realizados pelo “Programa Borboletas do Rio Grande do Sul” em doze localidades do estado entre 1996 e 2009, avaliar composição e diversidade e compilar da bibliografia informações sobre recursos alimentares para adultos e juvenis. Os estudos utilizados seguiram a metodologia de trans
Publicado em: 2010
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2. Effects of exposure to event 176 Bacillus thuringiensis corn pollen on monarch and black swallowtail caterpillars under field conditions
The widespread planting of corn genetically modified to produce Bacillus thuringiensis endotoxin has led to speculation that pollen from these fields might adversely affect nearby nontarget lepidopterans. A previous study of Bt corn engineered with Monsanto event 810 failed to detect an effect of pollen exposure on the black swallowtail, Papilio polyxenes, i
The National Academy of Sciences.
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3. Enemy-free space maintains swallowtail butterfly host shift
Natural enemies can be significant sources of mortality for herbivorous insects and therefore important agents of natural selection. One might expect selection to favor herbivores that escape from their natural enemies into enemy-free space. Although this is an appealing idea, it has received little empirical support, and no studies have documented enemy-fre
National Academy of Sciences.
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4. A host-inducible cytochrome P-450 from a host-specific caterpillar: molecular cloning and evolution.
Cytochrome P-450 monooxygenases (P-450s) play a critical role in the detoxification of natural and synthetic toxins in a wide range of organisms. We have isolated and sequenced cDNA clones encoding a P-450, CYP6B1, from larvae of Papilio polyxenes (Lepidoptera: Papilionidae), the black swallowtail butterfly. This P-450, cloned from a herbivorous insect, is h
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5. Absence of toxicity of Bacillus thuringiensis pollen to black swallowtails under field conditions
A single laboratory study on monarch butterflies has prompted widespread concern that corn pollen, engineered to express Bacillus thuringiensis (Bt) endotoxin, might travel beyond corn fields and cause mortality in nontarget lepidopterans. Among the lepidopterans at high potential risk from this technology is the black swallowtail butterfly, Papilio polyxene
The National Academy of Sciences.
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6. Diversification of furanocoumarin-metabolizing cytochrome P450 monooxygenases in two papilionids: Specificity and substrate encounter rate
Diversification of cytochrome P450 monooxygenases (P450s) is thought to result from antagonistic interactions between plants and their herbivorous enemies. However, little direct evidence demonstrates the relationship between selection by plant toxins and adaptive changes in herbivore P450s. Here we show that the furanocoumarin-metabolic activity of CYP6B pr
National Academy of Sciences.
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7. Transcriptional regulation of the Papilio polyxenes CYP6B1 gene.
Detoxification of host plant defensive compounds by larval Lepidoptera is mediated by cytochrome P450 monooxygenases (P450s) such as CYP6B1, which is expressed in Papilio polyxenes (black swallowtail) larvae in response to xanthotoxin, a linear furanocoumarin. Baculovirus-mediated expression of two cloned CYP6B1 cDNAs in lepidopteran cell lines has demonstra