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Patterns of phenotypic plasticity and local adaptation in the wide elevation range of the alpine plant Arabis alpina

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deVillemereuil_2018_Patterns_JEcology_AAM.pdf (251.3Kb)
Date
09/2018
Author
de Villemereuil, Pierre
Mouterde, Médéric
Gaggiotti, Oscar E.
Till-Buttraud, Irène
Keywords
Local adaptation
Phenotypic plasticity
Common garden
RAD sequencing
Arabis alpina
Alpine ecology
QH301 Biology
QH426 Genetics
SB Plant culture
DAS
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Abstract
1.  Local adaptation and phenotypic plasticity are two important characteristics of alpine plants to overcome the threats caused by global changes. Among alpine species, Arabis alpina is characterised by an unusually wide altitudinal amplitude, ranging from 800 to 3,100 m of elevation in the French Alps. Two non‐exclusive hypotheses can explain the presence of A. alpina across this broad ecological gradient: adaptive phenotypic plasticity or local adaptation, making this species especially useful to better understand these phenomena in alpine plant species. 2.  We carried out common garden experiments at two different elevations with maternal progenies from six sites that differed in altitude. We showed that (1) key phenotypic traits (morphotype, total fruit length, growth, height) display significant signs of local adaptation, (2) most traits studied are characterised by a high phenotypic plasticity between the two experimental gardens and (3) the two populations from the highest elevations lacked morphological plasticity compared to the other populations. 3.  By combining two genome scan approaches (detection of selection and association methods), we isolated a candidate gene (Sucrose‐Phosphate Synthase 1). This gene was associated with height and local average temperature in our studied populations, consistent with previous studies on this gene in Arabidopsis thaliana. 4.  Synthesis. Given the nature of the traits involved in the detected pattern of local adaptation and the relative lack of plasticity of the two most extreme populations, our findings are consistent with a scenario of a locally adaptive stress response syndrome in high elevation populations. Due to a reduced phenotypic plasticity, an overall low intra‐population genetic diversity of the adaptive traits and weak gene flow, populations of high altitude might have difficulties to cope with, e.g. a rise of temperature.
Citation
de Villemereuil , P , Mouterde , M , Gaggiotti , O E & Till-Buttraud , I 2018 , ' Patterns of phenotypic plasticity and local adaptation in the wide elevation range of the alpine plant Arabis alpina ' , Journal of Ecology , vol. 106 , no. 5 , pp. 1952–1971 . https://doi.org/10.1111/1365-2745.12955
Publication
Journal of Ecology
Status
Peer reviewed
DOI
https://doi.org/10.1111/1365-2745.12955
ISSN
0022-0477
Type
Journal article
Rights
© 2018 The Authors. Journal of Ecology © 2018 British Ecological Society. This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1111/1365-2745.12955
Description
OEG was supported by the Marine Alliance for Science and Technology for Scotland (MASTS).
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  • University of St Andrews Research
URI
http://hdl.handle.net/10023/17359

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