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    Heat shock protein expression during stress and diapause in the marine copepod Calanus finmarchicus

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    Date
    2011-03
    Author
    Aruda, Amalia M.  Concept link
    Baumgartner, Mark F.  Concept link
    Reitzel, Adam M.  Concept link
    Tarrant, Ann M.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/4810
    As published
    https://doi.org/10.1016/j.jinsphys.2011.03.007
    Keyword
     Copepod; Crustacean; Diapause; Heat shock protein; Stress response 
    Abstract
    Calanoid copepods, such as Calanus finmarchicus, are a key component of marine food webs. C. finmarchicus undergoes a facultative diapause during juvenile development, which profoundly affects their seasonal distribution and availability to their predators. The current ignorance of how copepod diapause is regulated limits understanding of copepod population dynamics, distribution, and ecosystem interactions. Heat shock proteins (Hsps) are a superfamily of molecular chaperones characteristically upregulated in response to stress conditions and frequently associated with diapause in other taxa. In this study, 8 heat shock proteins were identified in C. finmarchicus C5 copepodids (Hsp21, Hsp22, p26, Hsp90, and 4 forms of Hsp70), and expression of these transcripts was characterized in response to handling stress and in association with diapause. Hsp21, Hsp22, and Hsp70A (cytosolic subfamily) were induced by handling stress. Expression of Hsp70A was also elevated in shallow active copepodids relative to deep diapausing copepodids, which may reflect induction of this gene by varied stressors in active animals. In contrast, expression of Hsp22 was elevated in deep diapausing animals; Hsp22 may play a role both in short-term stress responses and in protecting proteins from degradation during diapause. Expression of most of the Hsps examined did not vary in response to diapause, perhaps because the diapause of C. finmarchicus is not associated with the extreme environmental conditions (e.g., freezing, desiccation) experienced by many other taxa, such as overwintering insects or Artemia cysts.
    Description
    Author Posting. © The Author(s), 2011. This is the author's version of the work. It is posted here by permission of Elsevier B.V. for personal use, not for redistribution. The definitive version was published in Journal of Insect Physiology 57 (2011): 665-675, doi:10.1016/j.jinsphys.2011.03.007.
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    • Biology
    Suggested Citation
    Preprint: Aruda, Amalia M., Baumgartner, Mark F., Reitzel, Adam M., Tarrant, Ann M., "Heat shock protein expression during stress and diapause in the marine copepod Calanus finmarchicus", 2011-03, https://doi.org/10.1016/j.jinsphys.2011.03.007, https://hdl.handle.net/1912/4810
     

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