English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/8870
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Title

Population variability in heat shock proteins among three Antarctic penguin species

AuthorsBarbosa, Andrés ; Merino, Santiago ; Benzal, Jesús ; Martínez, Javier ; García-Fraile, Sonia
KeywordsAntarctica
Ecophysiology
Environmental gradient
Heat shock protein
Pygoscelis adeliae
Pygoscelis antarctica
Pygoscelis papua
Stress
Issue Date2007
PublisherSpringer
CitationPolar Biology, 30:1239-1244
AbstractHeat shock proteins (HSPs) are synthesised under stressful conditions such as exposure to elevated temperatures, contamination, free radicals, UV light or pathophysiological states resulting from parasites and/or pathogens. HSPs function to protect cells by means of modulation of protein folding. In Antarctica, these proteins have been studied in such organisms as protozoa and fishes, without attention to geographical variation. We studied the variation of HSP70 and HSP60 levels in Gentoo, Adelie and Chinstrap penguins among different populations along the Antarctic Peninsula from King George Island (62°15′S) to Avian Island (67°46′S). Our results show that the northern population of Gentoo penguin showed higher levels of HSP70 and HSP60 than the southern population. High temperature, human impact and immunity as a proxy for parasites and diseases in northern locations could explain such variation. Adelie penguin only showed significant geographical variation in HSP70, increasing north to south, a pattern perhaps related to increased UV radiation and decreased temperatures from north to south. Chinstrap penguin shows no population differences in the variation in neither HSP70 nor HSP60, although HSP70 showed marginally significant differences. Sexual differences in the level of these proteins are also discussed.
Publisher version (URL)http://dx.doi.org/10.1007/s00300-007-0284-0
URIhttp://hdl.handle.net/10261/8870
DOI10.1007/s00300-007-0284-0
ISSN0722-4060
E-ISSN1432-2056
Appears in Collections:(EEZA) Artículos
Files in This Item:
There are no files associated with this item.
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.