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Complex patterns of geographic variation in heat tolerance and Hsp70 expression levels in the common frog Rana temporaria
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Evolution, Population and Conservation Biology.
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2009 (English)In: Journal of Thermal Biology, ISSN 0306-4565, Vol. 34, no 1, 49-54 p.Article in journal (Refereed) Published
Abstract [en]

1. We tested for geographical variation in heat tolerance and Hsp70 expression levels of Rana temporaria tadpoles along a 1500 km long latitudinal gradient in Sweden. 2. Temperature tolerance of the hatchling tadpoles did not differ among populations, but they tolerated stressful hot temperatures better than 2 weeks older tadpoles. 3. Among 2-week old tadpoles, the southern population tolerated 32 C better than tadpoles from other populations. A parallel difference was found in Hsp70 expression, with the southern population showing the highest expression level. Nevertheless, at a highly stressful temperature (36 C) the northern population showed highest tolerance. 4. The heat shock pre-treatment increased heat tolerance of the tadpoles. The possible adaptive role of Hsp70 for thermal tolerance and climatic adaptation in R. temporaria tadpoles is discussed.

Place, publisher, year, edition, pages
2009. Vol. 34, no 1, 49-54 p.
Keyword [en]
Amphibians, Heat shock protein, Latitudinal gradient, Temperature stress, Thermal adaptation
National Category
Biological Sciences
URN: urn:nbn:se:uu:diva-137338DOI: 10.1016/j.jtherbio.2008.10.004ISI: 000262884300008OAI: oai:DiVA.org:uu-137338DiVA: diva2:378307
Available from: 2010-12-15 Created: 2010-12-15 Last updated: 2010-12-15Bibliographically approved

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