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Phytotoxicity, bioaccumulation, and degradation of nonylphenol in different microalgal species without bacterial influences

Citation

He, N and Liu, Z and Sun, X and Wang, S and Liu, W and Sun, D and Duan, S, Phytotoxicity, bioaccumulation, and degradation of nonylphenol in different microalgal species without bacterial influences, International Journal of Molecular Sciences, 21, (4) Article 1338. ISSN 1422-0067 (2020) [Refereed Article]


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© 2020 by the authors. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) http://creativecommons.org/licenses/by/4.0/

DOI: doi:10.3390/ijms21041338

Abstract

Nonylphenol (NP) is a contaminant that has negative impacts on aquatic organisms. To investigate its phytotoxicity, bioaccumulation, and degradation in algae without associated bacteria, six freshwater microalgae—Ankistrodesmus acicularis, Chlorella vulgaris, Chroococcus minutus,, Scenedesmus obliquus, Scenedesmus quadricauda, and Selenastrum bibraianum—in bacteria-free cultures were studied. When exposed to 0.5–3.0 mg L−1 NP for 4 days, cell growth and photosynthesis, including maximal photochemistry (Fv/Fm), were suppressed progressively. The antioxidant responses of superoxide dismutase (SOD), catalase (CAT), and peroxidase (POD) showed species differences. While the antioxidant enzymes in C. vulgaris and S. obliquus were more active with the increase of NP (0–3 mg L−1), they dropped in the other four algae at concentrations of 1 and 1.5 mg L−1. Therefore, C. vulgaris and S. obliquus were designated as NP-tolerant species and showed more conspicuous and faster changes of antioxidant reactions compared with the four NP-sensitive species. All six species degraded NP, but A. acicularis was more reactive at low NP concentrations (<1 mg L−1), suggesting its possible application in sewage treatment for its potential for effective NP removal from water bodies in a suitable scope. Therefore, the conclusion is that biodegradation of NP by algae is species specific.

Item Details

Item Type:Refereed Article
Keywords:nonylphenol, microalgae, photosynthetic activities, antioxidant enzyme, biodegradation
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Marine and estuarine ecology (incl. marine ichthyology)
Objective Division:Environmental Management
Objective Group:Terrestrial systems and management
Objective Field:Assessment and management of terrestrial ecosystems
UTAS Author:Wang, S (Dr Shuangyao Wang)
ID Code:139913
Year Published:2020
Deposited By:Ecology and Biodiversity
Deposited On:2020-07-15
Last Modified:2021-02-03
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