Alkaloid tolerance in Manduca sexta and phylogenetically related sphingids (Lepidoptera: Sphingidae)

  title={Alkaloid tolerance in Manduca sexta and phylogenetically related sphingids (Lepidoptera: Sphingidae)},
  author={Michael Wink and Vera Theile},
SummaryNicotine tolerance is well known for Manduca sexta. It also occurs in several other sphingids of the subfamilies Macroglossinae and Sphinginae. Only members of the subfamily Smerinthinae appear to be more susceptible to nicotine intoxication. Phylogenetic trees have been reconstructed from mitochondrial 16S rDNA and nuclear DNA to map nicotine tolerance.¶The nicotine binding site of both α-subunits of nicotinic acetylcholine receptors (nAChR) have been amplified and sequenced. No… 

Differences in Nicotine Metabolism of Two Nicotiana attenuata Herbivores Render Them Differentially Susceptible to a Common Native Predator

Results are consistent with the hypothesis that generalist herbivores incur costs of detoxification, which include the ecological costs of greater predation risks, in addition to the previously demonstrated energetic, physiological and metabolic costs.

Sequestration of phorbol esters by aposematic larvae of Hyles euphorbiae (Lepidoptera: Sphingidae)?

Although H. euphorbiae caterpillars do not actively sequester phorbol esters, their aposematic colouration appears to be based on chemical defence through phorbl esters retained in the gut, even if some metabolism has taken place.

Multifaceted biological insights from a draft genome sequence of the tobacco hornworm moth, Manduca sexta.

Activity of quinolizidine alkaloids from three Mexican Lupinus against the lepidopteran crop pest Spodoptera frugiperda

Bitter lupins (Lupinus spp.) are not used as a protein source because of their toxicity. However, they may have alternative uses as potential sources of natural insecticides. Quinolizidine alkaloids

Larval Helicoverpa zea Transcriptional, Growth and Behavioral Responses to Nicotine and Nicotiana tabacum

It is suggested that an observed coincidental rise in cannibalistic behavior and regulation of proteases and protease inhibitors in H. zea larvae signify a compensatory response to induced plant defenses.

Context-dependent medicinal effects of anabasine and infection-dependent toxicity in bumble bees

Variation in the effect of anabasine on infection suggests potential modulation of tritrophic interactions by both host genotype and environmental variables, and suggests that the medicinal effects and toxicity of an abasine may be context dependent.

Origin and Diversity of Metabolically Active Gut Bacteria from Laboratory-Bred Larvae of Manduca sexta (Sphingidae, Lepidoptera, Insecta)

It is concluded that the larval gut of Manduca sexta supported only a low diversity of metabolically active bacteria.

The effects of the alkaloid scopolamine on the performance and behavior of two caterpillar species

It is shown that the addition of ecologically realistic levels of scopolamine to both the diet and the hemolymph of these two caterpillar species (M. sexta and G. mellonella) had no effect on the growth of either species, and evidence that scopolamines might not provide the broad-spectrum herbivore resistance typically attributed to it is provided.



Androconial Hairbrushes of the Syntomis (Amata) phegea (L.) Group (Lepidoptera, Ctenuchinae): A Synapomorphic Character Supported by Sequence Data of the Mitochondrial 16S rRNA Gene

Males of several palaearctic Syntomis/Amata species (Lepidoptera: Arctiidae) possess androconial hairbrushes in connection with the foreleg coxa. The cuticular structure of these potentially

Sequence Data of Mitochondrial 16S rDNA of Arctiidae and Nymphalidae: Evidence for a Convergent Evolution of Pyrrolizidine Alkoloid and Cardiac Glycoside Sequestration

The mitochondrial 16S rRNA gene of several arctiids was amplified by PCR and sequenced directly to reconstruct phylogenetic relationships between and within Arctiidae, Ctenuchidae, and Nymphalidae.

Sequence evolution in mitochondrial ribosomal and ND-1 genes in lepidoptera: implications for phylogenetic analyses.

Inability of molecular data to recover a well-established phylogeny may be rectified by additional characters or taxa, but it is clear that homoplasy is sufficiently high to caution against the acceptance of relationships generated with this molecular region that are not extremely robust.

The Bombycoidea: phylogeny and higher classification (Lepidoptera: Glossata)

This paper is chiefly aimed at reassessing the limits of four bombycoid families, namely the Eupterotidae, Saturniidae, Lemoni family, and Brahmaeidae, and another newly proposed clade groups together the Endromidae, Mirinidae and Saturni family.

Induction of cytochrome P-450 activities by nicotine in the tobacco hornworm,Manduca sexta

Results support the idea that induction of midgut cytochrome P-450-related metabolism is an adaptation of fifth-instarManduca sexta to dietary nicotine.

Hawkmoths of the World: An Annotated and Illustrated Revisionary Checklist (Lepidoptera: Sphingidae)

The new checklist is clearly needed by anyone working on hawkmoths, but the book is a rather curious compilation in having more than half its pages devoted not to the main checklist but to the over 600 taxonomic and nomenclatural notes.