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Do Antarctic Fish Respond to Heat Shock?

  • Luisella Carratù
  • Andrew Y. Gracey
  • Stefania Buono
  • Bruno Maresca

Abstract

Temperature is a major environmental factor requiring adaptive responses and it is a central selective element in speciation. One of the best known and complex mechanisms that is primarily involved in protecting cells from various forms of stresses, such as temperature, is the stress (heat shock) response [1], For poikilotherms, fluctuations in environmental temperatures can be fatal. Sudden drops in temperature can lead to a reduction in membrane fluid state that, in turn, causes cessation of normal functions. Unless rapidly corrected, such alterations will lead to physiological damage and, ultimately, to death. Several essential cellular activities depend on proper membrane functionality [2]. For elevated environmental temperatures, some of the problems encountered during chilling are also relevant. There still exist the dual needs of being able to “sense” the elevated environmental temperature and to couple this detection to the induction of gene expression — such as for heat shock genes. Recently, there have been several lines of evidence which suggest that changes in response to an abrupt rise in the environmental temperature may have analogies with chilling adaptation. Thus, membrane lipid composition, as well as the dynamic state of membrane lipids, represent the basic elements for membrane functionality. Membranes, indeed, have multiple physical properties which permit the cell to sense environmental changes.

Keywords

Heat Shock Heat Shock Response Heat Shock Factor Heat Shock Transcription Factor Heat Shock Gene 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Italia 1998

Authors and Affiliations

  • Luisella Carratù
    • 1
  • Andrew Y. Gracey
    • 2
  • Stefania Buono
    • 1
  • Bruno Maresca
    • 1
  1. 1.International Institute of Genetics and BiophysicsCNRNapoliItaly
  2. 2.Department of Environmental and Evolutionary BiologyUniversity of LiverpoolLiverpoolUK

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