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Effects of environmental factors on the growth and microcystin production of Microcystis aeruginosa under TiO2 nanoparticles stress.
Sci Total Environ. 2020 Sep 10; 734:139443.ST

Abstract

Due to the growing use and release of nanomaterials, their toxic impacts on aquatic ecosystems have drawn widespread attention in recent years. In this study, we exposed Microcystis aeruginosa to 5 mg/L titanium dioxide nanoparticles (nTiO2) under different culture conditions (pH 6, 7, 8, 9; 20 °C, 25 °C, 30 °C). The results showed that algae had the worst growth status with lowest biomass, lowest photosynthetic activity and highest reactive oxygen species (ROS) generation under 5 mg/L nTiO2 at pH 6 and 20 °C. Images by scanning electron microscopy (SEM) revealed that nTiO2 hindered light absorption by algal cells by wrapping the algal surface, which led to obvious cell surface deformation at pH 6 or 20 °C. In addition, microcystin-LR (MC-LR) production increased as temperature or pH decreased when exposed to nTiO2 at 5 mg/L, demonstrating that falling pH or temperature enhanced the adverse effects toward algal cells under nTiO2 stress and the potential risk of algae to the environment.

Authors+Show Affiliations

State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210046, China.State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210046, China.State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210046, China.State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210046, China. Electronic address: yinying@nju.edu.cn.State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210046, China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

32454338

Citation

Zhang, Jingxian, et al. "Effects of Environmental Factors On the Growth and Microcystin Production of Microcystis Aeruginosa Under TiO2 Nanoparticles Stress." The Science of the Total Environment, vol. 734, 2020, p. 139443.
Zhang J, Jiang L, Wu D, et al. Effects of environmental factors on the growth and microcystin production of Microcystis aeruginosa under TiO2 nanoparticles stress. Sci Total Environ. 2020;734:139443.
Zhang, J., Jiang, L., Wu, D., Yin, Y., & Guo, H. (2020). Effects of environmental factors on the growth and microcystin production of Microcystis aeruginosa under TiO2 nanoparticles stress. The Science of the Total Environment, 734, 139443. https://doi.org/10.1016/j.scitotenv.2020.139443
Zhang J, et al. Effects of Environmental Factors On the Growth and Microcystin Production of Microcystis Aeruginosa Under TiO2 Nanoparticles Stress. Sci Total Environ. 2020 Sep 10;734:139443. PubMed PMID: 32454338.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effects of environmental factors on the growth and microcystin production of Microcystis aeruginosa under TiO2 nanoparticles stress. AU - Zhang,Jingxian, AU - Jiang,Lijuan, AU - Wu,Di, AU - Yin,Ying, AU - Guo,Hongyan, Y1 - 2020/05/15/ PY - 2020/02/24/received PY - 2020/05/12/revised PY - 2020/05/12/accepted PY - 2020/5/27/pubmed PY - 2020/6/19/medline PY - 2020/5/27/entrez KW - MC-LR KW - Microcystis aeruginosa KW - Temperature KW - TiO(2) nanoparticles KW - pH SP - 139443 EP - 139443 JF - The Science of the total environment JO - Sci. Total Environ. VL - 734 N2 - Due to the growing use and release of nanomaterials, their toxic impacts on aquatic ecosystems have drawn widespread attention in recent years. In this study, we exposed Microcystis aeruginosa to 5 mg/L titanium dioxide nanoparticles (nTiO2) under different culture conditions (pH 6, 7, 8, 9; 20 °C, 25 °C, 30 °C). The results showed that algae had the worst growth status with lowest biomass, lowest photosynthetic activity and highest reactive oxygen species (ROS) generation under 5 mg/L nTiO2 at pH 6 and 20 °C. Images by scanning electron microscopy (SEM) revealed that nTiO2 hindered light absorption by algal cells by wrapping the algal surface, which led to obvious cell surface deformation at pH 6 or 20 °C. In addition, microcystin-LR (MC-LR) production increased as temperature or pH decreased when exposed to nTiO2 at 5 mg/L, demonstrating that falling pH or temperature enhanced the adverse effects toward algal cells under nTiO2 stress and the potential risk of algae to the environment. SN - 1879-1026 UR - https://www.unboundmedicine.com/medline/citation/32454338/Effects_of_environmental_factors_on_the_growth_and_microcystin_production_of_Microcystis_aeruginosa_under_TiO2_nanoparticles_stress L2 - https://linkinghub.elsevier.com/retrieve/pii/S0048-9697(20)32960-0 DB - PRIME DP - Unbound Medicine ER -
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