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The pathogen causing Dutch elm disease makes host trees attract insect vectors
- G. McLeod, R. Gries, G. Gries
- Environmental ScienceProceedings of the Royal Society B: Biological…
- 7 December 2005
Four semiochemicals from diseased American elms, Ulmus americana, synergistically attract H. rufipes and sesquiterpene emission is upregulated in elm trees inoculated with O. novo-ulmi, which manipulates host trees to enhance their apparency to foraging beetles.
Comparative metabolomics reveals biogenesis of ascarosides, a modular library of small-molecule signals in C. elegans.
- Stephan H von Reuss, Neelanjan Bose, F. Schroeder
- Biology, ChemistryJournal of the American Chemical Society
- 25 January 2012
It is shown that, following peroxisomal β-oxidation, the ascarosides are selectively derivatized with moieties of varied biogenetic origin and that such modifications can dramatically affect biological activity, producing signaling molecules active at low femtomolar concentrations.
Targeted metabolomics reveals a male pheromone and sex-specific ascaroside biosynthesis in Caenorhabditis elegans.
Analysis of gene expression data supports a model in which sex-specific regulation of peroxisomal β-oxidation produces functionally different ascaroside profiles, and suggests sensory regulation of ascarOSide biosynthesis in Caenorhabditis elegans.
Succinylated Octopamine Ascarosides and a New Pathway of Biogenic Amine Metabolism in Caenorhabditis elegans*
The results reveal a small-molecule connection between neurotransmitter signaling and interorganismal regulation of behavior and suggest that ascaroside biosynthesis is based in part on co-option of degradative biochemical pathways.
Conserved nematode signalling molecules elicit plant defenses and pathogen resistance
It is shown that several genera of plant-parasitic nematodes produce small molecules called ascarosides, an evolutionarily conserved family of nematode pheromones, which indicate that plants recognize ascarOSides as a conserved molecular signature of Nematodes.
A Modular Library of Small Molecule Signals Regulates Social Behaviors in Caenorhabditis elegans
Comparative metabolomics reveals a modular library of small molecule signals that function as aggregation pheromones in the nematode C. elegans.
Evolution of ‘pollinator’- attracting signals in fungi
It is argued that insect attraction using this compound is likely to have evolved from its primary function of defence—as has been suggested for floral scent in the angiosperms.
Volatile organic compounds produced by the phytopathogenic bacterium Xanthomonas campestris pv. vesicatoria 85-10
- Teresa Weise, M. Kai, B. Piechulla
- Chemistry, MedicineBeilstein journal of organic chemistry
- 17 April 2012
Volatile emission profiles of the bacteria were different for growth on media (nutrient broth) with or without glucose, and the structure of the dominant compound, 10-methylundecan-2-one, was assigned on the basis of its analytical data, obtained by GC/MS and verified by comparison of these data with those of a synthetic reference sample.
Erratum: Mating dynamics in a nematode with three sexes and its evolutionary implications
This study focuses on the nematode SB347, a unique free-living trioecious species that is far more amenable to laboratory manipulation and phylogenetic analysis places SB347 in Eurhabditids33, a species-rich clade above the genus level that includes the model nematodes Caenorhabditis elegans.