A Comparative Study on Low and High Salinity Tolerance of Two Strains of Pinctada fucata

This study compares salinity tolerance between red and black shell Pinctada fucata stress of 20 50‰, while 35‰ was used as a control. The hemolymph osmotic pressure, inorganic ion concentration, the activities Na + -K -ATPase, respiratory metabolism related enzymes liver tissue antioxidant were measured at 12 24 h after stress. pressure concentration two strains P. increased significantly with increase salinity. activity -ATPase only decreased under low h, higher than that control high h. succinate dehydrogenase (SDH) treatment groups those lactate (LDH) LDH lower in 50‰ superoxide dismutase (SOD) control, within 24. At catalase (CAT) salinity, but CAT highest Glutathione peroxidase (GSH-Px) alkaline phosphatase (AKP) or for GSH-Px lowest , AKP highest. present indicates physical responses to vary colors. can quickly respond positively change environmental reduce damage caused by