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Plant phenotypic plasticity changes pollinator-mediated selection.

Thomas Dorey1, Florian P Schiestl1

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Summary
This summary is machine-generated.

Phenotypic plasticity allows organisms to adapt to environmental changes. This study shows how plasticity influences plant-pollinator interactions and selection, aiding adaptation to local conditions.

Keywords:
Phenotypic plasticityphenotypic selectionpollination

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Area of Science:

  • Ecology
  • Evolutionary Biology
  • Plant Science

Background:

  • Phenotypic plasticity, the ability of organisms to alter their traits in response to environmental cues, is crucial for adaptation.
  • Understanding how plasticity influences biotic interactions, such as pollination and herbivory, and subsequent selection is vital.

Purpose of the Study:

  • To investigate the interplay between phenotypic plasticity, environmental factors (soil type, herbivory), and pollinator-mediated selection in Brassica rapa.
  • To determine how plasticity affects trait selection by pollinators under varying ecological conditions.

Main Methods:

  • Greenhouse experiment using fast-cycling Brassica rapa exposed to different soil types and aphid herbivory.
  • Quantification of plasticity in morphological, nectar, and floral scent traits.
  • Analysis of pollinator (hand and bumblebee) visitation patterns and selection on plant traits.

Main Results:

  • Brassica rapa exhibited significant plasticity in morphology, nectar, and floral scent under different soil and herbivory conditions.
  • Positive selection was observed on nectar and certain morphological traits in bee- and hand-pollinated plants.
  • Bumblebee selection on plant height, flower number, and flowering time varied with soil type and herbivory, with stronger selection in poorer soil under herbivory.

Conclusions:

  • Phenotypic plasticity can mediate pollinator-mediated selection, potentially promoting adaptation to local environmental conditions.
  • Environmental stressors like herbivory can alter the direction and strength of selection exerted by pollinators.
  • The study highlights the importance of considering plasticity in understanding evolutionary responses to environmental change.