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Chemical ecology and pollinator-driven speciation in sexually deceptive orchids

Title data

Ayasse, Manfred ; Stökl, Johannes ; Francke, Wittko:
Chemical ecology and pollinator-driven speciation in sexually deceptive orchids.
In: Phytochemistry. Vol. 72 (2011) Issue 13 . - pp. 1667-1677.
ISSN 0031-9422
DOI: https://doi.org/10.1016/j.phytochem.2011.03.023

Abstract in another language

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.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER147461
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Chair Animal Ecology II - Evolutionary Animal Ecology > Chair Animal Ecology II - Evolutionary Animal Ecology - Univ.-Prof. Dr. Sandra Steiger
Research Institutions
Research Institutions > Research Centres
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Result of work at the UBT: No
DDC Subjects: 500 Science
Date Deposited: 15 Apr 2019 07:12
Last Modified: 15 Apr 2019 07:12
URI: https://eref.uni-bayreuth.de/id/eprint/48380