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Functional divergence in heat shock response following rapid speciation of Fucus spp. in the Baltic Sea
Stockholm University, Faculty of Science, Department of Botany.
2010 (English)In: Marine Biology, ISSN 1432-1793, Vol. 157, no 3, 683-688 p.Article in journal (Refereed) Published
Abstract [en]

In the Baltic Sea, the broadly distributed brown alga Fucus vesiculosus coexists in sympatry over part of its range (south west Gulf of Bothnia) with the Baltic endemic F. radicans sp. nov, while further north in colder and lower-salinity areas of the Baltic F. radicans occurs alone (north west Gulf of Bothnia). F. radicans appears to have arisen via rapid speciation from F. vesiculosus within the recent history of the Baltic (ca. 7500 BP). Possible functional divergence between the two species was investigated by comparing stress-responsive gene expression in a common-garden experiment. The experiment used two allopatric populations of Fucus vesiculosus from the Skagerrak (North Sea) and Central Baltic, as well as F. radicans from the same Central Baltic site. The two species in sympatry displayed divergent heat shock responses, while F. vesiculosus populations from allopatric sites did not. F. radicans was more sensitive to heat shock at 25°C, either alone or together with high irradiance and desiccation, than Baltic or Skagerrak F. vesiculosus. The results indicate that rapid functional divergence in the inducible heat shock response has occurred between sympatric species on a timescale of thousands of years.

Place, publisher, year, edition, pages
New York: Springer , 2010. Vol. 157, no 3, 683-688 p.
Keyword [en]
MOLECULAR CHAPERONES; VESICULOSUS; POPULATIONS; PROTEINS; EVOLUTION; ALGA; PHAEOPHYCEAE; SUCCESS; LIFE; TOOL
National Category
Genetics
Research subject
Population Genetics
Identifiers
URN: urn:nbn:se:su:diva-34646DOI: 10.1007/s00227-009-1348-1ISI: 000274386400022OAI: oai:DiVA.org:su-34646DiVA: diva2:285247
Available from: 2010-01-21 Created: 2010-01-11 Last updated: 2010-12-29Bibliographically approved

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CiteExportLink to record
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