Oxidative stress responses caused by dimethyl phthalate (DMP) and diethyl phthalate (DEP) in a marine diatom Phaeodactylum tricornutum
| Autor: | Jingwei Dong, Qian Lu, Xiangyuan Deng, Bin Li, Chunye Xue, Kun Gao, Pingkang Qian |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Antioxidant medicine.medical_treatment Phthalic Acids 010501 environmental sciences Aquatic Science Oceanography Diethyl phthalate medicine.disease_cause complex mixtures 01 natural sciences chemistry.chemical_compound medicine Phaeodactylum tricornutum 0105 earth and related environmental sciences EC50 chemistry.chemical_classification Diatoms Reactive oxygen species biology 010604 marine biology & hydrobiology Chlorophyll A Esters biology.organism_classification Pollution Oxidative Stress Diatom chemistry Environmental chemistry Dimethyl phthalate Oxidative stress |
| Zdroj: | Marine pollution bulletin. 166 |
| ISSN: | 1879-3363 |
| Popis: | A marine diatom (Phaeodactylum tricornutum) was exposed to different concentrations of dimethyl phthalate (DMP) and diethyl phthalate (DEP) for 96 h within a batch-culture system to investigate their toxicities. Results showed that P. tricornutum could remove DMP and DEP effectively with removal rates of 0.20–0.30 and 0.14–0.21 mg L−1 h−1, respectively. In addition, DMP and DEP significantly inhibited the photosynthesis and chlorophyll a biosynthesis of P. tricornutum with 96-h EC50 values of 390.5 mg L−1 and 74.0 mg L−1, respectively. Results of reactive oxygen species (ROS) level suggested that the two PAEs could induce excessive ROS production in the diatom. Moreover, activities of antioxidant enzymes (i.e., SOD and POD) in the diatom increased with the increase of DMP and DEP concentrations. The results will help to understand the toxic mechanisms of PAEs, and provide strong evidences for evaluating their ecological risks in the marine environment. |
| Databáze: | OpenAIRE |
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