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Abstract Detail

Molecular Ecology

Preston, Jill [1], Wooliver, Rachel [2], Driscoll, Heather [3], Coughlin, Erin [4], Sheth, Seema [4].

Spatial variation in high temperature-regulated gene expression predicts evolution of plasticity with climate change in the scarlet monkeyflower.

A major way that organisms can adapt to changing environmental conditions is by evolving higher or lower phenotypic plasticity. In the face of current global warming, more attention is being paid to the role of plasticity in maintaining fitness as abiotic conditions change over time. However, given that temporal data can be challenging to acquire, a major question is whether evolution in plasticity across space can predict adaptive plasticity across time. Here, we generate transcriptome data from scarlet monkeyflower (Mimulus cardinalis) plants collected from different latitudes and years in western North America. Consistent with the genetic compensation hypothesis, individuals whose progenitors were collected from the warmer, more variable southern latitude showed lower thermal plasticity in gene expression than their colder, less variable northern latitude counterparts. This was largely due to a change in response at 40 °C rather than 20 °C. A similar pattern of reduced plasticity largely due to a change in response at 40 °C was also found for the northern cohort collected in warmer 2017 versus colder 2010. Our results demonstrate that reduced phenotypic plasticity can evolve with warming and that spatial changes in plasticity can predict temporal ones.

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1 - University Of Vermont, Plant Biology, 63 Carrigan Drive, 111 Jeffords Hall, Burlington, VT, 05405, United States
2 - University of Tennessee, Biosystems Engineering and Soil Science, Knoxville, TN, USA
3 - Norwich University, Biology, 158 Harmon Drive, Northfield, VT, 05663, USA
4 - North Carolina State University, Plant and Microbial Biology, Raleigh, NC, USA

climate change
differential gene expression
Mimulus cardinalis
phenotypic plasticity
resurrection study
space by time substitution
thermal adaptation.

Presentation Type: Oral Paper
Session: ME1, Molecular Ecology
Location: /
Date: Tuesday, July 20th, 2021
Time: 4:30 PM(EDT)
Number: ME1007
Abstract ID:138
Candidate for Awards:None

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