Adaptive plasticity and epigenetic variation in response to warming in an Alpine plant

Environmentally induced phenotypic plasticity may be a critical component of response to changing environments. We examined local differentiation and adaptive phenotypic plasticity in response to elevated temperature in half‐sib lines collected across an elevation gradient for the alpine herb, Wahle...

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Vydáno v:Ecology and evolution Ročník 5; číslo 3; s. 634 - 647
Hlavní autoři: Nicotra, Adrienne B., Segal, Deborah L., Hoyle, Gemma L., Schrey, Aaron W., Verhoeven, Koen J. F., Richards, Christina L.
Médium: Journal Article
Jazyk:angličtina
Vydáno: England John Wiley & Sons, Inc 01.02.2015
BlackWell Publishing Ltd
Témata:
Adaptive plasticity
alpine plants
Amplified fragment length polymorphism
Changing environments
Climate change
Critical components
Deoxyribonucleic acid
Differentiation
DNA
DNA methylation
Environmental changes
Epigenetics
Gene polymorphism
Generalized linear models
global warming
High temperature
National parks
Original Research
Phenotypes
Phenotypic plasticity
Plant introductions
Plastic properties
Plasticity
Polymorphism
Seedlings
Seeds
Temperature effects
Australia
DNA methylation
amplified fragment length polymorphism
Adaptive plasticity
global warming
alpine plants
epigenetics
ISSN:2045-7758, 2045-7758
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Shrnutí:Environmentally induced phenotypic plasticity may be a critical component of response to changing environments. We examined local differentiation and adaptive phenotypic plasticity in response to elevated temperature in half‐sib lines collected across an elevation gradient for the alpine herb, Wahlenbergia ceracea. Using Amplified Fragment Length Polymorphism (AFLP), we found low but significant genetic differentiation between low‐ and high‐elevation seedlings, and seedlings originating from low elevations grew faster and showed stronger temperature responses (more plasticity) than those from medium and high elevations. Furthermore, plasticity was more often adaptive for plants of low‐elevation origin and maladaptive for plants of high elevation. With methylation sensitive‐AFLP (MS‐AFLP), we revealed an increase in epigenetic variation in response to temperature in low‐elevation seedlings. Although we did not find significant direct correlations between MS‐AFLP loci and phenotypes, our results demonstrate that adaptive plasticity in temperature response to warming varies over fine spatial scales and suggest the involvement of epigenetic mechanisms in this response. Our work presents an exciting fusion of research on epigenetics (DNA methylation in particular) and adaptive phenotypic plasticity. The relationship between epigenetic mechanisms and phenotypic plasticity has been the subject of increasing speculation in ecological studies. Our results demonstrate that adaptive plasticity in temperature response of an alpine herb varies over remarkably fine geographic scales and indicates the involvement of epigenetic mechanisms in this response.
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Funding Information This work was funded by an Australian Research Council grants to ABN, GLH and colleagues (LP0991593) and to ABN, CLR and colleagues (DP120100945).
ISSN:2045-7758
2045-7758
DOI:10.1002/ece3.1329