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Floral Scent Contributes to Interaction Specificity in Coevolving Plants and Their Insect Pollinators
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Plant Ecology and Evolution.
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2014 (English)In: Journal of Chemical Ecology, ISSN 0098-0331, E-ISSN 1573-1561, Vol. 40, no 9, 955-965 p.Article in journal (Refereed) Published
Abstract [en]

Chemical defenses, repellents, and attractants are important shapers of species interactions. Chemical attractants could contribute to the divergence of coevolving plant-insect interactions, if pollinators are especially responsive to signals from the local plant species. We experimentally investigated patterns of daily floral scent production in three Lithophragma species (Saxifragaceae) that are geographically isolated and tested how scent divergence affects attraction of their major pollinator the floral parasitic moth Greya politella (Prodoxidae). These moths oviposit through the corolla while simultaneously pollinating the flower with pollen adhering to the abdomen. The complex and species-specific floral scent profiles were emitted in higher amounts during the day, when these day-flying moths are active. There was minimal divergence found in petal color, which is another potential floral attractant. Female moths responded most strongly to scent from their local host species in olfactometer bioassays, and were more likely to oviposit in, and thereby pollinate, their local host species in no-choice trials. The results suggest that floral scent is an important attractant in this interaction. Local specialization in the pollinator response to a highly specific plant chemistry, thus, has the potential to contribute importantly to patterns of interaction specificity among coevolving plants and highly specialized pollinators.

Place, publisher, year, edition, pages
2014. Vol. 40, no 9, 955-965 p.
Keyword [en]
Coevolution, Diurnal rhythm, Host specialization, Geographic mosaics, Plant-insect communication, Speciation
National Category
Ecology Biochemistry and Molecular Biology
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URN: urn:nbn:se:uu:diva-240154DOI: 10.1007/s10886-014-0497-yISI: 000345391400001PubMedID: 25236381OAI: oai:DiVA.org:uu-240154DiVA: diva2:776600
Available from: 2015-01-07 Created: 2015-01-05 Last updated: 2017-12-05Bibliographically approved

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Friberg, Magne

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