| Autor: |
Adrian GJ; School of Life Sciences Arizona State University Tempe AZ USA., Czarnoleski M; Institute of Environmental Sciences Jagiellonian University Krakow Poland., Angilletta MJ Jr; School of Life Sciences Arizona State University Tempe AZ USA. |
| Jazyk: |
angličtina |
| Zdroj: |
Ecology and evolution [Ecol Evol] 2016 Oct 12; Vol. 6 (22), pp. 7991-7996. Date of Electronic Publication: 2016 Oct 12 (Print Publication: 2016). |
| DOI: |
10.1002/ece3.2534 |
| Abstrakt: |
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. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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