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Keywords	electroantennographic detection, floral odor, gas chromatography, orchid pollination, pollinator behavior
Abstract	1 Whereas most orchid species offer a food-reward for their pollinators, some, without offering any reward, mimic the signals of rewarding flowers (food deception) or females of the pollinator species (sexual deception). Floral fragrances are important for attracting pollinators in both rewarding and deceptive species and are therefore significant for the reproductive success of a plant. 2 This project will investigate, in a comparative approach, the role of floral odor in orchid pollination ecology in species representing the pollination syndromes of food reward, food deception, and sexual deception. It will use a powerful combination of analytical chemistry, electrophysiology, and behavioral experiments. 3 The following aims will be targeted: (i) Identify the floral odor compounds that are detected by the pollinator insects. (ii) Determine the variability in active and non-active odor compounds within orchid populations. (iii) Investigate the attractiveness of specific odor compounds for pollinators and the consequence of their variability for influencing pollinator behavior. (iiii) Investigate the changes in odor communication in relation to the evolution of various orchid pollination syndromes.
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Name	Affiliation	Home page	e-mail	Total pubs
Schiestl FP	Geobotanisches Institut ETH, Zollikerstrasse 107, CH-8008 Zurich, Switzerland			1