Ayasse, Manfred and Stoekl, Johannes and Francke, Wittko (2011) Chemical ecology and pollinator-driven speciation in sexually deceptive orchids. PHYTOCHEMISTRY, 72 (13). pp. 1667-1677. ISSN 0031-9422
Full text not available from this repository. (Request a copy)Abstract
Sexually deceptive orchids mimic females of their pollinator species to attract male insects for pollination. Pollination by sexual deception has independently evolved in European, Australian, South African, and South American orchid taxa. Reproductive isolation is mainly based on pre-mating isolation barriers, the specific attraction of males of a single pollinator species, mostly bees, by mimicking the female species-specific sex-pheromone. However, in rare cases post-mating barriers have been found. Sexually deceptive orchids are ideal candidates for studies of sympatric speciation, because key adaptive traits such as the pollinator-attracting scent are associated with their reproductive success and with pre-mating isolation. During the last two decades several investigations studied processes of ecological speciation in sexually deceptive orchids of Europe and Australia. Using various methods like behavioural experiments, chemical, electrophysiological, and population-genetic analyses it was shown that minor changes in floral odour bouquets might be the driving force for pollinator shifts and speciation events. New pollinators act as an isolation barrier towards other sympatrically occurring species. Hybridization occurs because of similar odour bouquets of species and the overlap of flowering periods. Hybrid speciation can also lead to the displacement of species by the hybrid population, if its reproductive success is higher than that in the parental species. (C) 2011 Elsevier Ltd. All rights reserved.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | BEE COLLETES-CUNICULARIUS; REPRODUCTIVE ISOLATION; OPHRYS ORCHIDACEAE; SEX-PHEROMONE; CUTICULAR HYDROCARBONS; SELECTION MAINTAINS; GENUS OPHRYS; ODOR SIGNALS; MIMICRY; EVOLUTION; Sexual deception; Speciation; Orchidaceae; Floral scent; Hybridization; Chemical mimicry |
| Subjects: | 500 Science > 590 Zoological sciences |
| Divisions: | Biology, Preclinical Medicine > Institut für Zoologie > Chemische Ökologie (Prof. Dr. Joachim Ruther) |
| Depositing User: | Petra Gürster |
| Date Deposited: | 04 May 2020 07:10 |
| Last Modified: | 04 May 2020 07:10 |
| URI: | https://pred.uni-regensburg.de/id/eprint/20360 |
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