Fig. 1. The effect of different concentrations of cadmium on intracellular pH (pHi) of isolated digestive gland cells of Mytilus galloprovincialis. Values are means ± S.D. of at least 7 independent experiments. In each experiment, the tissue of four animals was used. ^*Significantly different after cadmium treatment from control value at the respective time point. Values that share the same letter (a, b) are statistically significant different from each other at the same time point; Dunnet's test, P<0.01.