The Response of Antioxidant Enzyme in Zebra Fish to Water Polluted by Heavy Metals Pollutants

摘要

Zebra fish was used as testing animal to be stimulated by heavy metals(Cd~(2+) and Pb~(2+)) in 1/20, 1/10 and 1/5 half-lethal concentrations respectively. The superoxide dismutase (SOD) and catalase (CAT) were used as biomarkers to study the response of heavy metals pollutants in water on antioxidant enzyme of zebra fish. The results indicated that the activities of SOD weakened with the time increasing in the polluted water containing Cd~(2+), but the activities of CAT increased under the low concentration, and the activities trend of CAT increased at the initial period and then decreased when the concentration of Cd~(2+) increased a certain degree. Moreover, the activities of SOD became stronger along the time increasing in the polluted water containing Pb~(2+), but the enhancing trend of SOD gradually became weaker along increased concentrations, however for the activities of CAT enhanced in the initial period and then fell with the time, and the trend of decline was more and more obvious.