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Temperature and telomeres: thermal treatment influences telomere dynamics through a complex interplay of cellular processes in a cold-climate skink

Artikel i vetenskaplig tidskrift
Författare L. J. Fitzpatrick
Mats Olsson
L. M. Parsley
Angela Pauliny
T. L. Pinfold
T. Pirtle
G. M. While
E. Wapstra
Publicerad i Oecologia
Volym 191
Nummer/häfte 4
Sidor 767-776
ISSN 0029-8549
Publiceringsår 2019
Publicerad vid Institutionen för biologi och miljövetenskap
Sidor 767-776
Språk en
Länkar dx.doi.org/10.1007/s00442-019-04530...
Ämnesord Climate, Ectotherm, Reactive oxygen species, Reptile, Telomere, Reptilia, Squamata, animal, cold, cold climate, lizard, temperature, Animals, Cold Temperature, Lizards
Ämneskategorier Klimatforskning, Ekologi

Sammanfattning

Telomere dynamics vary fundamentally between endothermic populations and species as a result of differences in life history, yet we know little about these patterns in ectotherms. In ectotherms, the relationships between climate, metabolism and life history suggest that telomere attrition should be higher at relatively high environmental temperatures compared to relatively low environmental temperatures, but these effects may vary between populations due to local adaptation. To address this hypothesis, we sampled reactive oxygen species (ROS) and telomere length of lizards from warm lowland and cool highland populations of a climatically widespread lizard species that we exposed to hot or cold basking treatments. The hot treatment increased relative telomere length compared to the cold treatment independent of climatic origin or ROS levels. Lizards from the cool highland region had lower ROS levels than those from the warm lowland region. Within the highland lizards, ROS increased more in the cold basking treatment than the hot basking treatment. These results are in the opposite direction to those predicted, suggesting that the relationships between temperature, metabolism, ROS and telomere dynamics are not straightforward. Future work incorporating detailed understanding of the thermal reaction norms of these and other linked traits is needed to fully understand these processes. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.

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