Schiestl Pollinator attraction and speciation in sexually deceptive orchids, Proc. Remarkably, this process of divergence or recent speciation may be possible in sympatry. Francke Pollinator attraction by pheromone-mimicking compounds in Australian and European sexually deceptive orchids.
In other words, the divergence of orchid species into new species might be associated with divergences occurring in the wasp pollinators themselves. Our molecular results suggested that reproductive isolation can evolve rapidly through switches onto new pollinators. Striking differences in the timing of orchid and wasp species divergences suggest that even this congruence should not be attributed to co-speciation. Publications and Presentations Mant, J. Such strong specificity suggests the possibility that sexually deceptive orchids have co-evolved with their pollinators in a process dominated by co-speciation.
Other traits, such as wasp emergence timing, are also evolutionarily conservative. Mant, In press Chemical communication in the sexually deceptive orchid genus Cryptostylis, Lindleyana. This strongly suggests that the orchids did not differentiate at the same time as the wasps but later. By examining the floral scent chemistry used to attract distinct species of wasps, we showed that related wasp species have very similar sex pheromone chemistry.
In this way, pollination is achieved without the production of costly floral rewards. One of the most fascinating aspects of this interaction is that orchid species tend to attract only a single pollinator species. Note that although there is some correspondence between wasp and orchid groupings the pattern of relative branch lengths is quite different between wasp and orchid trees. European Orchid Conference, London, most popular matchmaking apps U.
The orchids are remarkable for their mimicry of both the appearance and sex pheromones of wingless female thynnines. This Hermon Slade Foundation project took a novel evolutionary approach to understanding the evolutionary association between sexually deceptive orchids and their pollinators. American Journal of Botany. If the orchids and wasps have co-evolved, we would expect their evolutionary histories to be matching.
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