Time course of sea water acclimation by the euryhaline teleost, Dormitator maculatus: Correlation between potassium stimulation of sodium efflux and Na/K activated ATPase activity

D. H. Evans, Charles Mallery

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The time course of sea water acclimation of the teleost, Dormitator maculatus has been investigated by transferring fresh water acclimated individuals into 50% sea water for 24 h and thence into full strength sea water. At various times after the initial transfer from fresh water, individuals were removed and assayed for either potassium stimulation of sodium efflux or gill tissue activity of the enzyme Na/K activated ATPase. If an early, rapid increase in total cellular protein is taken into account, it can be shown that the time course of the activation of potassium-stimulated sodium efflux is approximately the same as the time course of the activation of the enzyme. Such parallel activation supports the view that Na/K activated ATPase is functionally linked to sodium extrusion by this species.

Original languageEnglish (US)
Pages (from-to)117-122
Number of pages6
JournalJournal of Comparative Physiology ■ B
Volume96
Issue number2
DOIs
StatePublished - Jun 1 1975

Fingerprint

sodium-potassium-exchanging ATPase
Acclimatization
Seawater
teleost
acclimation
Adenosine Triphosphatases
Potassium
potassium
seawater
Sodium
sodium
Water
Fresh Water
Chemical activation
enzyme activation
enzyme
extrusion
Enzyme Activation
gills
enzyme activity

ASJC Scopus subject areas

  • Physiology
  • Ecology, Evolution, Behavior and Systematics
  • Biochemistry
  • Animal Science and Zoology
  • Endocrinology

Cite this

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abstract = "The time course of sea water acclimation of the teleost, Dormitator maculatus has been investigated by transferring fresh water acclimated individuals into 50{\%} sea water for 24 h and thence into full strength sea water. At various times after the initial transfer from fresh water, individuals were removed and assayed for either potassium stimulation of sodium efflux or gill tissue activity of the enzyme Na/K activated ATPase. If an early, rapid increase in total cellular protein is taken into account, it can be shown that the time course of the activation of potassium-stimulated sodium efflux is approximately the same as the time course of the activation of the enzyme. Such parallel activation supports the view that Na/K activated ATPase is functionally linked to sodium extrusion by this species.",
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AB - The time course of sea water acclimation of the teleost, Dormitator maculatus has been investigated by transferring fresh water acclimated individuals into 50% sea water for 24 h and thence into full strength sea water. At various times after the initial transfer from fresh water, individuals were removed and assayed for either potassium stimulation of sodium efflux or gill tissue activity of the enzyme Na/K activated ATPase. If an early, rapid increase in total cellular protein is taken into account, it can be shown that the time course of the activation of potassium-stimulated sodium efflux is approximately the same as the time course of the activation of the enzyme. Such parallel activation supports the view that Na/K activated ATPase is functionally linked to sodium extrusion by this species.

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