Full description
The mechanism of pollinator attraction is predicted to strongly influence both plant diversification and the extent of pollinator sharing between species. Sexually deceptive orchids rely on mimicry of species-specific sex pheromones to attract their insect pollinators. Given that sex pheromones tend to be conserved among related species, we predicted that in sexually deceptive orchids, (i) pollinator sharing is rare, (ii) closely related orchids use closely related pollinators and (iii) there is strong bias in the wasp lineages exploited by orchids. We focused on species that are pollinated by sexual deception of thynnine wasps in the distantly related genera Caladenia and Drakaea, including new field observations for 45 species of Caladenia. Specialization was extreme with most orchids using a single pollinator species. Unexpectedly, seven cases of pollinator sharing were found, including two between Caladenia and Drakaea, which exhibit strikingly different floral morphology. Phylogenetic analysis of pollinators using four nuclear sequence loci demonstrated that although orchids within major clades primarily use closely related pollinator species, up to 17% of orchids within these clades are pollinated by a member of a phylogenetically distant wasp genus. Further, compared to the total diversity of thynnine wasps within the study region, orchids show a strong bias towards exploiting certain genera. Although these patterns may arise through conservatism in the chemical classes used in sex pheromones, apparent switches between wasp clades suggest unexpected flexibility in floral semiochemical production. Alternatively, wasp sex pheromones within lineages may exhibit greater chemical diversity than currently appreciated.,Phillips et al CAD DRYADAlignment of the CAD sequence locus. Used for phylogenetic analysisPhillips et al COI DRYADAlignment of the COI sequence locus. Used for DNA barcoding analysis of thynnine waspsPhillips et al Rhodopsin DRYADAlignment of the LW Rhodopsin sequence locus. Used in phylogenetic analysis of thynnine waspsPhillips et al RNA pol2 DRYADDNA sequence alignment of the RNA poly2 sequence locus. Used in phylogenetic analysis of thynnine waspsPhillips et al Wingless DRYADDNA sequence alignment of the Wingless sequence locus. Used in phylogenetic analysis of thynnine wasps,Notes
External OrganisationsRoyal Darwin Hospital; Australian National University
Associated Persons
Ryan D. Phillips (Creator)Graham R. Brown (Creator); Christine Hayes (Creator); Celeste C. Linde (Creator)
Ryan D. Phillips (Creator)Graham R. Brown (Creator); Christine Hayes (Creator); Celeste C. Linde (Creator)
Issued: 2017-06-26
Subjects
Aeolothynnus westwoodi |
Agriomyia sp. |
Arthrothynnus latus |
Aulacothynnus alexanderi |
Campylothynnus assimilis |
Campylothynnus flavopictus |
Campylothynnus sp. A |
Catocheilus affinis |
Catocheilus annulatus |
Catocheilus immodestus |
Catocheilus sp. A |
Catocheilus sp. B |
Chilothynnus palachilus |
Eirone leai |
Guerinius sp. |
Iswaroides sp. A |
Lestricothynnus modestus |
Lestricothynnus sp. A |
Lophocheilus sp. A |
Macrothynnus sp. A |
Neozeleboria cryptoides |
Neozeleboria monticola |
Neozeleboria sp. |
Neozeleboria sp. 29 |
Neozeleboria sp. 30 |
Neozeleboria tabulata |
New genus 1 sp. A |
New genus 2 sp. A |
New genus 3 sp. A |
New genus 3 sp. B |
New genus 3 sp. C |
New genus 4 sp. A |
New genus 4 sp. B |
New genus 4 sp. C |
Phymatothynnus sp. |
Phymatothynnus sp. A |
Phymatothynnus sp. B |
Phymatothynnus sp. C |
Phymatothynnus sp. D Phymatothynnus victor |
Pogonothynnus sp. A |
Rhytidothynnus sp. |
Tachynomyia sp. A |
Thynnoides sp. A |
Thynnoides sp. B |
Thynnoides sp. C |
Thynnoides sp. D |
Thynnoides sp. E |
Thynnoides sp. F |
Thynnoides sp. G |
Thynnoides sp. H |
Thynnoides sp. I |
Thynnoides sp. J |
Thynnoides sp. K |
Thynnoturneria sp. |
Zaspilothynnus dilatatus |
Zaspilothynnus gilesi |
Zaspilothynnus maturus |
Zaspilothynnus nigripes |
Zaspilothynnus rugicollis |
Zaspilothynnus seductor |
Zaspilothynnus sp. A |
Zaspilothynnus sp. B |
Zaspilothynnus sp. C |
Zaspilothynnus sp. D |
Zaspilothynnus trilobatus |
Zaspliothynnus sp. D |
Zeleboria sp. A |
Zeleboria sp. B |
Zeleboria sp. C |
Zeleboria sp. D |
Zeleboria sp. E |
Zeleboria sp. F |
convergent evolution |
phylogenetics |
pollination |
sexual deception |
specialisation |
User Contributed Tags
Login to tag this record with meaningful keywords to make it easier to discover
Identifiers
- DOI : 10.5061/DRYAD.6JQ11
- global : 99a909b0-31b2-4ac3-9ec0-3c225855f399