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Gene expression under thermal stress varies across a geographic range expansion front.

Lancaster, Lesley T; Dudaniec, Rachael Y; Chauhan, Pallavi LU ; Wellenreuther, Maren LU ; Svensson, Erik LU and Hansson, Bengt LU (2016) In Molecular Ecology 25(5). p.1141-1156
Abstract
Many ectothermic species are currently expanding their distributions polewards due to anthropogenic global warming. Molecular genetic mechanisms facilitating range expansion under these conditions are largely unknown, but understanding these could help mitigate expanding pests and disease vectors, or help explain why some species fail to track changing climates. Here, using RNA-seq data, we examine genome-wide changes in gene expression under heat and cold stress in the range-expanding damselfly Ischnura elegans in northern Europe. We find that both the number of genes involved and levels of gene expression under heat stress have become attenuated during the expansion, consistent with a previously-reported release from selection on heat... (More)
Many ectothermic species are currently expanding their distributions polewards due to anthropogenic global warming. Molecular genetic mechanisms facilitating range expansion under these conditions are largely unknown, but understanding these could help mitigate expanding pests and disease vectors, or help explain why some species fail to track changing climates. Here, using RNA-seq data, we examine genome-wide changes in gene expression under heat and cold stress in the range-expanding damselfly Ischnura elegans in northern Europe. We find that both the number of genes involved and levels of gene expression under heat stress have become attenuated during the expansion, consistent with a previously-reported release from selection on heat tolerances as species move polewards. Genes upregulated under cold stress differed between core and edge populations, corroborating previously-reported rapid adaptation to cooler climates at the expansion front. Expression of sixty-nine genes exhibited a region x treatment effect; these were primarily upregulated in response to heat stress in core populations but in response to cold stress at the range edge, suggesting that some cellular responses originally adapted to heat stress may switch to cold stress functionality upon encountering novel thermal selection regimes during range expansion. Transcriptional responses to thermal stress involving heat shock and neural function genes were largely geographically conserved, while retrotransposon, regulatory, muscle function and defence gene expression patterns were more variable. Flexible mechanisms of cold stress response and the ability of some genes to shift their function between heat and cold stress might be key mechanisms facilitating rapid poleward expansion in insects. This article is protected by copyright. All rights reserved. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Molecular Ecology
volume
25
issue
5
pages
1141 - 1156
publisher
Wiley-Blackwell
external identifiers
  • pmid:26821170
  • scopus:84959219309
  • wos:000371433400009
ISSN
0962-1083
DOI
10.1111/mec.13548
project
CAnMove
Colour genes in dragonflies
language
English
LU publication?
yes
id
21d5c61f-7e4f-4b91-bc1f-b890b75a6067 (old id 8573078)
date added to LUP
2016-02-17 09:39:51
date last changed
2017-10-22 03:09:08
@article{21d5c61f-7e4f-4b91-bc1f-b890b75a6067,
  abstract     = {Many ectothermic species are currently expanding their distributions polewards due to anthropogenic global warming. Molecular genetic mechanisms facilitating range expansion under these conditions are largely unknown, but understanding these could help mitigate expanding pests and disease vectors, or help explain why some species fail to track changing climates. Here, using RNA-seq data, we examine genome-wide changes in gene expression under heat and cold stress in the range-expanding damselfly Ischnura elegans in northern Europe. We find that both the number of genes involved and levels of gene expression under heat stress have become attenuated during the expansion, consistent with a previously-reported release from selection on heat tolerances as species move polewards. Genes upregulated under cold stress differed between core and edge populations, corroborating previously-reported rapid adaptation to cooler climates at the expansion front. Expression of sixty-nine genes exhibited a region x treatment effect; these were primarily upregulated in response to heat stress in core populations but in response to cold stress at the range edge, suggesting that some cellular responses originally adapted to heat stress may switch to cold stress functionality upon encountering novel thermal selection regimes during range expansion. Transcriptional responses to thermal stress involving heat shock and neural function genes were largely geographically conserved, while retrotransposon, regulatory, muscle function and defence gene expression patterns were more variable. Flexible mechanisms of cold stress response and the ability of some genes to shift their function between heat and cold stress might be key mechanisms facilitating rapid poleward expansion in insects. This article is protected by copyright. All rights reserved.},
  author       = {Lancaster, Lesley T and Dudaniec, Rachael Y and Chauhan, Pallavi and Wellenreuther, Maren and Svensson, Erik and Hansson, Bengt},
  issn         = {0962-1083},
  language     = {eng},
  month        = {01},
  number       = {5},
  pages        = {1141--1156},
  publisher    = {Wiley-Blackwell},
  series       = {Molecular Ecology},
  title        = {Gene expression under thermal stress varies across a geographic range expansion front.},
  url          = {http://dx.doi.org/10.1111/mec.13548},
  volume       = {25},
  year         = {2016},
}