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Combined effects of water temperature and copper ion concentration on catalase activity in Crassostrea ariakensis

Chinese Journal of Oceanology and Limnology 2015年第4期33卷 905-912页

作者：王辉杨洪帅刘加慧李艳红刘志刚 School of Life Sciences of Huaiyin Normal University Fisheries College of Guangdong Ocean University

A central composite experimental design and response surface method were used to investigate the combined effects of water temperature(18–34℃) and copper ion concentration(0.1–1.5 mg/L) on the catalase(CAT) activity in the digestive gland of C rassostrea ariakensis. The results showed that the linear effects of temperature were significant(P copper ion concentration were not significant(P >0.05), and the quadratic effects of copper ion concentration were significant(P ionally, the synergistic effects of temperature and copper ion concentration were not significant(P >0.05), and the effect of temperature was greater than that of copper ion concentration. A model equation of CAT enzyme activity in the digestive gland of C. ariakensis toward the two factors of interest was established, with R 2, Adj. R 2 and Pred. R 2 values as high as 0.943 7, 0.887 3 and 0.838 5, respectively. These findings suggested that the goodness of fit to experimental data and predictive capability of the model were satisfactory, and could be practically applied for prediction under the conditions of the study. Overall, the results suggest that the simultaneous variation of temperature and copper ion concentration alters the activity of the antioxidant enzyme CAT by modulating active oxygen species metabolism, which may be utilized as a biomarker to detect the effects of copper pollution.

关键词： Crassostrea ariakensis catalase temperature copper ion concentration combined effects

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