Influence of temperature and salinity on glucose-06-phosphate dehydrogenase and 6-phosphogluconate dehydrogenase in mussel (Mytilus edulis, L.)

Abstract

The activity of Glucose-06-phosphate dehydrogenase and 6-phosphogluconate dehydrogenase in mussel hepatopancreas and gill tissues decreases with the salinity of sea water. A decrease in both activities is observed during the first few days in the hepatopancreas of mussel starved at temperatures upper and below the natural thermal habitat; later, the levels of enzymes experience a transitory rise. The influence of temperature on the Km of 6-phosphogluconate dehydrogenase for the hepatopancreas was studied. Minimum value correspond to the nearest temperature to that of the mussel natural habitat.