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Global warming is one of the biggest threats to global biodiversity causing not only changes in the patterns of precipitation and temperature but also disturbing ecological interactions. The aim of our study was to forecast the effect of climate change on the distribution of food-deceptive orchid species whose pollination strategy relies on a strict association with pollinators and co-occurring rewarding Faboideae plants. We used the ecological niche modeling approach to evaluate future overlap of the suitable niches of studied orchid species with the predicted distribution of their ecological partners.
View Article and Find Full Text PDFPollinator-mediated isolation promotes coexistence of closely related food-deceptive orchids.
J Evol Biol
November 2024
Centre for Functional Biodiversity, School of Life Sciences, University of KwaZulu-Natal, Scottsville, Pietermaritzburg 3209, South Africa.
Identifying the factors that contribute to reproductive isolation among closely-related species is key for understanding the diversification of lineages. In this study, we investigate the strength of premating and postmating reproductive isolation barriers between Disa ferruginea and Disa gladioliflora, a pair of closely-related species, often found co-flowering in sympatry. Both species are non-rewarding and rely on mimicry of different rewarding model flowers for attraction of pollinators.
View Article and Find Full Text PDFWhen is lethal deceptive pollination maintained? A population dynamics approach.
Ann Bot
October 2024
Faculty of Environmental, Life, Nature Science and Technology, Okayama University, Okayama 700-8530, Japan.
Background And Aims: Not all plant-pollinator interactions are mutualistic, and in fact deceptive pollination systems are widespread in nature. The genus Arisaema has a pollination system known as lethal deceptive pollination, in which plants not only attract pollinating insects without providing any rewards, but also trap them until they die. Many Arisaema species are endangered from various disturbances, including reduction in forest habitat, modification of the forest understorey owing to increasing deer abundance, and plant theft for horticultural cultivation.
View Article and Find Full Text PDFGenome of the early spider-orchid Ophrys sphegodes provides insights into sexual deception and pollinator adaptation.
Nat Commun
July 2024
Department of Plant Evolutionary Biology, Institute of Biology, University of Hohenheim, Stuttgart, Germany.
Article Synopsis
- Pollinator-driven evolution of floral traits significantly influences the speciation and diversification of angiosperms, with Ophrys orchids employing sexual deception by mimicking female insects to attract male pollinators.
- The study presents a comprehensive 5.2 Gb genome sequence of Ophrys sphegodes, revealing key genetic features such as transposable element expansion and gene duplication that aid in chemical mimicry and reproductive isolation.
- A notably differentiated genomic region on chromosome 2 is linked to pollinator-mediated evolution, indicating that this genome can help explore the genetics behind repeated sexual deception and adaptations in pollinators.
Osmophore Structure and Labellum Micromorphology in (Orchidaceae): New Interpretations of Floral Features and Implications for a Specific Sexually Deceptive Pollination Interaction.
Plants (Basel)
May 2024
Centro de Estudos do Ambiente e do Mar (CESAM Lisboa), Faculdade de Ciências da Universidade de Lisboa (FCUL), C2, Campo Grande, 1749-016 Lisboa, Portugal.
Pollination by sexual deception specifically attracts male insects, through the floral scent and particular morphological features of the flower that serve as visual and tactile stimuli. The unique bond between the orchid and the male wasp primarily stems from a few distinctive semiochemicals that mimic the female wasp's sex pheromone, although the floral scent comprises a variety of compounds. An osmophore producing highly volatile compounds has been documented in four close relatives of and is now being also investigated in this species.
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