The combined effects of cadmium and salinity on some pigments and total phenolic compounds of Myriophyllum heterophyllum Michx. and Potamogeton crispus L.

In this study, the combined effects of different salinity and cadmium concentrations (0, 0.05‰ NaCl + 4 mg L-1 Cd, 0.05‰ NaCl + 64 mg L-1 Cd, 5‰ NaCl + 4 mg L-1 Cd, 5‰ NaCl + 64 mg L-1 Cd) on some pigments (chlorophyll a, chlorophyll b, carotenoids and anthocyanins) and total phenolic compounds were investigated in two aquatic plants (Myriophyllum heterophyllum Michx. and Potamogeton crispus L.) at 24 and 96 h. Chlorophyll a, chlorophyll b and carotenoids decreased depending on Cd + NaCl concentrations and the time (24 h and 96 h) in both species (P<0.05). The anthocyanin concentrations showed differences in combined Cd and NaCl concentrations in both species at 24 and 96 h. In the two time periods (24 and 96 h), the levels of phenolic compounds at all concentrations of Cd + NaCl increased in both M. heterophyllum and P. crispus (P<0.05).