Data/hora: 02/06/2024 16:19:08

Provedor de dados: | 74
País: | Brazil
Título: | Different levels of hsp70 and hsc70 mRNA expression in Iberian fish exposed to distinct river conditions
Autores: | Jesus,Tiago F.; Inácio,Ângela; Coelho,Maria M.
Data: | 2013-01-01
Ano: | 2013
Palavras-chave: | Cyprinidae; Heat shock proteins; Squalius; Thermal stress.
Resumo: | Comprehension of the mechanisms by which ectotherms, such as fish, respond to thermal stress is paramount for understanding the threats that environmental changes may pose to wild populations. Heat shock proteins are molecular chaperones with an important role in several stress conditions such as high temperatures. In the Iberian Peninsula, particularly in Portugal, freshwater fish of the genus Squalius are subject to daily and seasonal temperature variations. To examine the extent to which different thermal regimes influence the expression patterns of hsp70 and hsc70 transcripts we exposed two species of Squalius (S. torgalensis and S. carolitertii) to different temperatures (20, 25, 30 and 35 ºC). At 35 ºC, there was a significant increase in the expression of hsp70 and hsc70 in the southern species, S. torgalensis, while the northern species, S. carolitertii, showed no increase in the expression of these genes; however, some individuals of the latter species died when exposed to 35 ºC. These results suggest that S. torgalensis may cope better with harsher temperatures that are characteristic of this species natural environment; S. carolitertii, on the other hand, may be unable to deal with the extreme temperatures faced by the southern species.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572013000100009
Editor: | Sociedade Brasileira de Genética
Relação: | 10.1590/S1415-47572013000100009
Formato: | text/html
Fonte: | Genetics and Molecular Biology  v.36 n.1 2013
Fonte: | info:eu-repo/semantics/openAccess