The evolutionary ecology of plant reproductive diversity and floral signals : Mating system and floral scent in Arabis alpina
Flowering plants display an extraordinary floral- and reproductive diversity. Variation in the size, shape, colour and scent of flowers, and in systems and strategies of mating, is ubiquitous in comparisons of different species, but also exists among different conspecific populations. Diversity in t...
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Lund University
2020
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ftulundlup:oai:lup.lub.lu.se:f51792ae-5445-45ae-b015-eaf1d2bc144d 2023-05-15T15:16:05+02:00 The evolutionary ecology of plant reproductive diversity and floral signals : Mating system and floral scent in Arabis alpina Petrén, Hampus 2020-11-03 application/pdf https://lup.lub.lu.se/record/f51792ae-5445-45ae-b015-eaf1d2bc144d https://portal.research.lu.se/files/86165587/H_Petren_Thesis_Summary.pdf eng eng Lund University https://lup.lub.lu.se/record/f51792ae-5445-45ae-b015-eaf1d2bc144d urn:isbn:978-91-7895-682-1 urn:isbn:978-91-7895-683-8 https://portal.research.lu.se/files/86165587/H_Petren_Thesis_Summary.pdf info:eu-repo/semantics/openAccess Ecology Evolutionary Biology Arabis alpina floral scent intraspecific variation mating system parental conflict phenotypic plasticity phenotypic selection reproductive isolation speciation volatile organic compound (VOC) thesis/doccomp info:eu-repo/semantics/doctoralThesis text 2020 ftulundlup 2023-02-01T23:37:52Z Flowering plants display an extraordinary floral- and reproductive diversity. Variation in the size, shape, colour and scent of flowers, and in systems and strategies of mating, is ubiquitous in comparisons of different species, but also exists among different conspecific populations. Diversity in these characters is central to the evolution of flowering plants and the formation of new species. In this thesis, I use the arctic-alpine plant Arabis alpina to explore various causes of intraspecific variation in floral scent, and consequences of evolutionary shifts in plant mating system. By combining experiments in the greenhouse, genomic data and studies in the field, I examine how mating system, natural selection, genetic differentiation and phenotypic plasticity shape intraspecific floral scent variation, and investigate the impact of mating system shifts for the build-up of reproductive isolation. Comparing the floral scent of different A. alpina populations distributed across Europe, I found that self-compatible populations had a lower floral scent emission rate and partly different scent composition compared to self-incompatible populations. For both self-compatible and self-incompatible populations, there was limited phenotypic plasticity in floral scent, with some effect of nutrient availability, but not of water availability, on scent emission rates. Comparing the genomic and phenotypic differentiation among self-incompatible populations, it was evident that closely related populations could differ considerably in floral scent. Estimating selection on floral scent, I found some evidence that patterns of selection differed between populations. By crossing plants from self-compatible populations with plants from self-incompatible populations, I found considerable reproductive isolation, consistent with parental conflict over seed provisioning being higher in self-incompatible than in self-compatible populations. Taken together, the results of my thesis reveal some of the complex patterns behind floral scent ... Doctoral or Postdoctoral Thesis Arctic Lund University Publications (LUP) Arctic |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Ecology Evolutionary Biology Arabis alpina floral scent intraspecific variation mating system parental conflict phenotypic plasticity phenotypic selection reproductive isolation speciation volatile organic compound (VOC) |
spellingShingle |
Ecology Evolutionary Biology Arabis alpina floral scent intraspecific variation mating system parental conflict phenotypic plasticity phenotypic selection reproductive isolation speciation volatile organic compound (VOC) Petrén, Hampus The evolutionary ecology of plant reproductive diversity and floral signals : Mating system and floral scent in Arabis alpina |
topic_facet |
Ecology Evolutionary Biology Arabis alpina floral scent intraspecific variation mating system parental conflict phenotypic plasticity phenotypic selection reproductive isolation speciation volatile organic compound (VOC) |
description |
Flowering plants display an extraordinary floral- and reproductive diversity. Variation in the size, shape, colour and scent of flowers, and in systems and strategies of mating, is ubiquitous in comparisons of different species, but also exists among different conspecific populations. Diversity in these characters is central to the evolution of flowering plants and the formation of new species. In this thesis, I use the arctic-alpine plant Arabis alpina to explore various causes of intraspecific variation in floral scent, and consequences of evolutionary shifts in plant mating system. By combining experiments in the greenhouse, genomic data and studies in the field, I examine how mating system, natural selection, genetic differentiation and phenotypic plasticity shape intraspecific floral scent variation, and investigate the impact of mating system shifts for the build-up of reproductive isolation. Comparing the floral scent of different A. alpina populations distributed across Europe, I found that self-compatible populations had a lower floral scent emission rate and partly different scent composition compared to self-incompatible populations. For both self-compatible and self-incompatible populations, there was limited phenotypic plasticity in floral scent, with some effect of nutrient availability, but not of water availability, on scent emission rates. Comparing the genomic and phenotypic differentiation among self-incompatible populations, it was evident that closely related populations could differ considerably in floral scent. Estimating selection on floral scent, I found some evidence that patterns of selection differed between populations. By crossing plants from self-compatible populations with plants from self-incompatible populations, I found considerable reproductive isolation, consistent with parental conflict over seed provisioning being higher in self-incompatible than in self-compatible populations. Taken together, the results of my thesis reveal some of the complex patterns behind floral scent ... |
format |
Doctoral or Postdoctoral Thesis |
author |
Petrén, Hampus |
author_facet |
Petrén, Hampus |
author_sort |
Petrén, Hampus |
title |
The evolutionary ecology of plant reproductive diversity and floral signals : Mating system and floral scent in Arabis alpina |
title_short |
The evolutionary ecology of plant reproductive diversity and floral signals : Mating system and floral scent in Arabis alpina |
title_full |
The evolutionary ecology of plant reproductive diversity and floral signals : Mating system and floral scent in Arabis alpina |
title_fullStr |
The evolutionary ecology of plant reproductive diversity and floral signals : Mating system and floral scent in Arabis alpina |
title_full_unstemmed |
The evolutionary ecology of plant reproductive diversity and floral signals : Mating system and floral scent in Arabis alpina |
title_sort |
evolutionary ecology of plant reproductive diversity and floral signals : mating system and floral scent in arabis alpina |
publisher |
Lund University |
publishDate |
2020 |
url |
https://lup.lub.lu.se/record/f51792ae-5445-45ae-b015-eaf1d2bc144d https://portal.research.lu.se/files/86165587/H_Petren_Thesis_Summary.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
https://lup.lub.lu.se/record/f51792ae-5445-45ae-b015-eaf1d2bc144d urn:isbn:978-91-7895-682-1 urn:isbn:978-91-7895-683-8 https://portal.research.lu.se/files/86165587/H_Petren_Thesis_Summary.pdf |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766346388697776128 |