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How consistent are the transcriptome changes associated with cold acclimation in two species of the Drosophila virilis group?

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Ritchie_DrosophilaVirilis_AM.pdf (997.4Kb)
Date
07/2015
Author
Parker, D. J.
Vesala, L.
Ritchie, M. G.
Laiho, A.
Hoikkala, A.
Kankare, M.
Funder
NERC
NERC
Grant ID
NE/E015255/1
NE/J020818/1
Keywords
Differential expression analysis
Northern house mosquito
Large gene lists
Biological-membranes
Stress tolerance
Culex-pipiens
Chill-coma
Temperature
Melanogaster
Myoinositol
QH301 Biology
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Abstract
For many organisms the ability to cold acclimate with the onset of seasonal cold has major implications for their fitness. In insects, where this ability is widespread, the physiological changes associated with increased cold tolerance have been well studied. Despite this, little work has been done to trace changes in gene expression during cold acclimation that lead to an increase in cold tolerance. We used an RNA-Seq approach to investigate this in two species of the Drosophila virilis group. We found that the majority of genes that are differentially expressed during cold acclimation differ between the two species. Despite this, the biological processes associated with the differentially expressed genes were broadly similar in the two species. These included: metabolism, cell membrane composition, and circadian rhythms, which are largely consistent with previous work on cold acclimation/cold tolerance. In addition, we also found evidence of the involvement of the rhodopsin pathway in cold acclimation, a pathway that has been recently linked to thermotaxis. Interestingly, we found no evidence of differential expression of stress genes implying that long-term cold acclimation and short-term stress response may have a different physiological basis.
Citation
Parker , D J , Vesala , L , Ritchie , M G , Laiho , A , Hoikkala , A & Kankare , M 2015 , ' How consistent are the transcriptome changes associated with cold acclimation in two species of the Drosophila virilis group? ' , Heredity , vol. 115 , no. 1 , pp. 13-21 . https://doi.org/10.1038/hdy.2015.6
Publication
Heredity
Status
Peer reviewed
DOI
https://doi.org/10.1038/hdy.2015.6
ISSN
0018-067X
Type
Journal article
Rights
© 2015, Publisher / the Author(s). This work is 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 www.nature.com / https://dx.doi.org/10.1038/hdy.2015.6
Description
This work was financially support by a Marie Curie Initial Training Network grant, “Understanding the evolutionary origin of biological diversity” (ITN-2008–213780 SPECIATION), grants from the Academy of Finland to A.H. (project 132619) and M.K. (projects 268214 and 272927), a grant from NERC, UK to M.G.R. (grant NE/J020818/1), and NERC, UK PhD studentship to D.J.P. (NE/I528634/1).
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  • University of St Andrews Research
URI
http://hdl.handle.net/10023/8014

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