Menu

Javascript is not activated in your browser. This website needs javascript activated to work properly.
You are here

Evolutionary adaptation to environmental stressors : A common response at the proteomic level

Author:
  • Jesper G. Sørensen
  • Mads F. Schou
  • Volker Loeschcke
Publishing year: 2017
Language: English
Pages: 1627-1642
Publication/Series: Evolution
Volume: 71
Issue: 6
Document type: Journal article
Publisher: Wiley-Blackwell

Abstract english

Mechanistic trade-offs between traits under selection can shape and constrain evolutionary adaptation to environmental stressors. However, our knowledge of the quantitative and qualitative overlap in the molecular machinery among stress tolerance traits is highly restricted by the challenges of comparing and interpreting data between separate studies and laboratories, as well as to extrapolating between different levels of biological organization. We investigated the expression of the constitutive proteome (833 proteins) of 35 Drosophila melanogaster replicate populations artificially selected for increased resistance to six different environmental stressors. The evolved proteomes were significantly differentiated from replicated control lines. A targeted analysis of the constitutive proteomes revealed a regime-specific selection response among heat-shock proteins, which provides evidence that selection also adjusts the constitutive expression of these molecular chaperones. Although the selection response in some proteins was regime specific, the results were dominated by evidence for a “common stress response.” With the exception of high temperature survival, we found no evidence for negative correlations between environmental stress resistance traits, meaning that evolutionary adaptation is not constrained by mechanistic trade-offs in regulation of functional important proteins. Instead, standing genetic variation and genetic trade-offs outside regulatory domains likely constrain the evolutionary responses in natural populations.

Keywords

  • Evolutionary Biology
  • Zoology
  • Drosophila melanogaster,Ectotherms,General stress response,Heat-shock protein,Stress tolerance,Thermal stress

Other

Published
  • ISSN: 1558-5646
Mads Schou
E-mail: mads [dot] schou [at] biol [dot] lu [dot] se

Postdoctoral fellow

MEMEG

+4551349299

E-A221

50