Flies evolved small bodies and cells at high or fluctuating temperatures

Gregory J. Adrian, Marcin Czarnoleski, Michael Angilletta

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

Recent theory predicts that the sizes of cells will evolve according to fluctuations in body temperature. Smaller cells speed metabolism during periods of warming but require more energy to maintain and repair. To evaluate this theory, we studied the evolution of cell size in populations of Drosophila melanogaster held at either a constant temperature (16°C or 25°C) or fluctuating temperatures (16 and 25°C). Populations that evolved at fluctuating temperatures or a constant 25°C developed smaller thoraxes, wings, and cells than did flies exposed to a constant 16°C. The cells of flies from fluctuating environments were intermediate in size to those of flies from constant environments. Most genetic variation in cell size was independent of variation in wing size, suggesting that cell size was a target of selection. These evolutionary patterns accord with patterns of developmental plasticity documented previously. Future studies should focus on the mechanisms that underlie the selective advantage of small cells at high or fluctuating temperatures.

Original languageEnglish (US)
Pages (from-to)7991-7996
Number of pages6
JournalEcology and Evolution
Volume6
Issue number22
DOIs
StatePublished - Nov 1 2016

Keywords

  • Drosophila
  • body size
  • cell size
  • experimental evolution
  • fluctuations
  • selection
  • temperature

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Ecology
  • Nature and Landscape Conservation

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