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Role of monovalent ions in cell volume regulation in marine invertebrates

Role of monovalent ions in cell volume regulation in marine invertebrates

Biologiya Morya (Vladivostok) (2): 57-64

During adaptation of marine invertebrates to higher salinity, the tissue K content is not changed, Na content being increased in Mytilus edulis adductor, Arenicola marina isolated body walls and Metridium senile sole. The intracellular content of Na+ and Cl- increases in the mussel adductor proportional to raising of salinity. The cell volume of mussel adductor and worm body wall was sharply decreased in 10.permill. sea water with addition of mannitol or polyethyleneglycol-400. Small changes of cell volume were obsreved with high concentrations of K salts in 10.permill. sea water. The middle degree of cell dehydration was observed after the addition of Na salt to 10.permill. sea water. Cell swelling is obviuosly determined by the type of anion (SO4-, Cl-, NO3-, CNS-) in solution. The change of intracellular concentration of Na- and Cl- is an important mechanism of the cell volume regulation in marine invertebrates.

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Accession: 006351998

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