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Journal of Experimental Biology, Vol 198, Issue 5 1229-1232, Copyright © 1995 by Company of Biologists

JOURNAL ARTICLES

The effects of thiocyanate on the intracellular ion concentrations of branchial epithelial cells of brown trout

I Morgan and W Potts

Exposure of brown trout (Salmo trutta) in fresh water to 0.15 mmol l-1 external thiocyanate for 1 h resulted in a significant decrease in chlorine concentration in the branchial mitochondria-rich (MR) cells from 37 mmol l-1 to 22 mmol l-1. The intracellular sodium concentration in these cells decreased by a similar amount, whilst the intracellular phosphorus concentration increased significantly. In contrast to the MR cells, 0.15 mmol l-1 external thiocyanate had no effect on the intracellular ion concentrations in the pavement epithelial cells. Thiocyanate is known to inhibit chloride uptake in a number of freshwater animals and therefore these data suggest that it is only the MR cells that are involved in the uptake of Cl- in brown trout.


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© The Company of Biologists Ltd 1995