Abstract
The objective of this study was to examine the effect of benzo[a]pyrene (BaP) on the detoxification and antioxidant systems of two microalgae, Isochrysis zhanjiangensis and Platymonas subcordiformis. In our study, these two algae were exposed to BaP for 4 days at three different concentrations including 0.5 μg L−1 (low), 3 μg L−1 (mid) and 18 μg L−1 (high). The activity of detoxification enzymes, ethoxyresorufin O-deethylase (EROD) and glutathione S-transferase (GST) increased in P. subcordiformis in all BaP-treated groups. In I. zhanjiangensis, the activity of these two enzymes increased at the beginning of exposure, and then decreased in the groups treated with mid- and high BaP. The activity of antioxidant enzyme superoxide dismutase (SOD) increased in I. zhanjiangensis in all BaP-treated groups, and then decreased in high BaP-treated group, while no significant change was observed in P. subcordiformis. The activity of antioxidant enzyme catalase (CAT) increased in I. zhanjiangensis and P. subcordiformis in all BaPtreated groups. The content of malondialdehyde (MDA) in Isochrysis zhanjiangensis increased first, and then decreased in high BaP-treated group, while no change occurred in P. subcordiformis. These results demonstrated that BaP significantly influenced the activity of detoxifying and antioxidant enzymes in microalgae. The metabolic related enzymes (EROD, GST and CAT) may serve as sensitive biomarkers of measuring the contamination level of BaP in marine water.
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Shen, C., Miao, J., Li, Y. et al. Effect of benzo[a]pyrene on detoxification and the activity of antioxidant enzymes of marine microalgae. J. Ocean Univ. China 15, 303–310 (2016). https://doi.org/10.1007/s11802-016-2771-9
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DOI: https://doi.org/10.1007/s11802-016-2771-9