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Journal of Bioenergetics and Biomembranes

, Volume 15, Issue 6, pp 363–377 | Cite as

The adaptation to salinity: Response of fish gill mitochondria to salinity stress

  • N. Suresh
  • J. Jayaraman
Research Articles

Abstract

When a freshwater fish,Tilapia mossambica (now renamedSarotherodon mossambicus) is exposed to a salinity stress, extensive changes are noted in the properties of the mitochondria isolated from the gill tissue. Our efforts were directed toward ascertaining the response of the gill mitochondria to an ion-osmotic shock to which the organism is exposed. Notable among them are the loss of ability to phosphorylate externally added ADP, decreased45Ca++ uptake, lower transhydrogenase levels, and nonresponse to ATP + Mg++ for contraction. During this period there is a large influx of calcium into the mitochondria. Continued exposure to the stress situation reverses virtually all the changes to the freshwater levels.

Key Words

Gill mitochondria salinity adaptation calcium uptake 

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Copyright information

© Plenum Publishing Corporation 1983

Authors and Affiliations

  • N. Suresh
    • 1
  • J. Jayaraman
    • 1
  1. 1.Department of Biochemistry, School of Biological SciencesMadura Kamraj UniversityMaduraiIndia

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