Journal of Chemical Ecology
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Identification of Conjugated Pentadecadienals as Sex Pheromone Components of the Sphingid Moth, Dolbina tancrei.
We identified novel bombykal analogs as sex pheromone components from a Japanese sphingid moth, Dolbina tancrei. Staudinger (Sphingidae: Lepidoptera). Sex pheromone gland extracts from calling female moths were subjected to gas chromatography/electroantennograhic detection (GC/EAD), gas chromatograp...
Incorporation of an introduced weed into the diet of a native butterfly: consequences for preference, performance and chemical defense.
We performed a series of experiments to assess larval preference and performance on the introduced P. lanceolata and on a native host plant that does not contain iridoid glycosides, water hyssop, Bacopa monnieri (Plantaginaceae). We also tested whether or not white peacocks were able to sequester ir...
The lodgepole × jack pine hybrid zone in Alberta, Canada: a stepping stone for the mountain pine beetle on its journey East across the borea...
Historical data show that outbreaks of the tree killing mountain pine beetle are often preceded by periods of drought. Global climate change impacts drought frequency and severity and is implicated in the range expansion of the mountain pine beetle into formerly unsuitable habitats. Its expanded ran...
Antagonistic interactions mediated by marine bacteria: the role of small molecules.
We review the antagonistic activities mediated by marine bacteria with a focus on activities linked to structurally defined secondary metabolites. Bacterial antagonism has been documented against other marine bacteria as well as eukaryotes, and includes antibiosis, the inhibition of quorum sensing,...
Exploring lower limits of plant elemental defense by cobalt, copper, nickel, and zinc.
These results indicate that elemental defense for Co, Ni, and Zn may be effective at concentrations lower than hyperaccumulator levels and so may be more widespread than previously believed....
Season-long volatile emissions from peach and pear trees in situ, overlapping profiles, and olfactory attraction of an oligophagous fruit mo...
We tested whether this temporal switch is facilitated by female responses to plant volatiles. We collected volatiles from peach and pear trees in situ and characterized their seasonal dynamics by gas chromatography-mass spectrometry. We also assessed the effects of the natural volatile blends releas...
Citral Induces Auxin and Ethylene-Mediated Malformations and Arrests Cell Division in Arabidopsis thaliana Roots.
Citral is a linear monoterpene which is present, as a volatile component, in the essential oil of several different aromatic plants. Previous studies have demonstrated the ability of citral to alter the mitotic microtubules of plant cells, especially at low concentrations. The changes to the microtu...
Caterpillar labial saliva alters tomato plant gene expression.
We examined the effects of Helicoverpa zea caterpillar labial saliva on tomato plant gene expression. Caterpillars with labial salivary glands (mock-ablated) and without (ablated) were fed on tomato plants for 24 hr; then, the leaf mRNA was analyzed with tomato microarrays. Analysis of the transcrip...
The Key Role of 4-methyl-5-vinylthiazole in the Attraction of Scarab Beetle Pollinators: a Unique Olfactory Floral Signal Shared by Annonace...
We performed GC-MS analyses of floral scents of four species of Annona (magnoliids, Annonaceae) and Caladium bicolor (monocots, Araceae), and demonstrated the chemical basis for the attraction of their effective pollinators. 4-Methyl-5-vinylthiazole, a nitrogen and sulphur-containing heterocyclic co...
Mechanisms for eliminating monoterpenes of sagebrush by specialist and generalist rabbits.
We examined the mechanisms used by specialist pygmy rabbits to eliminate 1,8-cineole, a monoterpene of sagebrush, and compared them with those of cottontail rabbits (Sylvilagus nuttalli), a generalist herbivore. Rabbits were offered food pellets with increasing concentrations of cineole, and we meas...