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Physiological responses to ferrate (VI) stress in Microcystis aeruginosa
Liu, Liming (1); Li, Lin (1); Wu, Zhongxing (1); Song, Lirong (1); Liu, L.(ctguhb@ctgu.edu.cn)
Conference Name2011 International Conference on Remote Sensing, Environment and Transportation Engineering, RSETE 2011
Source Publication2011 International Conference on Remote Sensing, Environment and Transportation Engineering, RSETE 2011 - Proceedings
Conference DateJune 24, 2011 - June 26, 2011
Conference PlaceNanjing, China
PublisherIEEE Computer Society
Department(1) State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei, 430072, China; (2) Engineering Research Center of Eco-Environment in Three Gorges Reservoir Region, Ministry of Education, China Three Gorges University, Yichang, Hubei, 443002, China; (3) Graduate School, Chinese Academy of Sciences, Beijing, 100049, China
AbstractPotassium ferrate (VI) has been considered to be an environmentally friendly oxidant. In this paper, a research on the physiological and biochemical changes of the ferrate (VI)'s acting on Microcystis aeruginosa FACHB-905, a common kind in algal bloom, has been performed. Under the action of ferrate (VI), chlorophyll-a content, the photosynthetic oxygen evolution rate, maximum electron transport rate (ETRm) and maximum photochemical efficiency (Fv/Fm) of Microcystis aeruginosa were significantly decreased, while MC-LR, an extracellular toxin of Microcystis aeruginosa increased. Malonaldehyde (MDA) is oxidatively stressed by low concentration of ferrate (VI). With the increasing concentration of ferrate (VI), MDA content increases, and the activity of SOD and CAT also shows a significant rise. After the treatment of low concentration ferrate (VI), GST activity decreased rapidly, while with the further increasing of ferrate (VI), GST activity increased gradually. This shows that ferrate (VI) produces oxidative stress on Microcystis aeruginosa. The mechanism is that ferrate (VI) inhibits the activity of microcystin photosynthetic PS II system, which leads to the damage to photosynthesis. The accumulation of excessive intracellular free radicals can further lead to the lipid peroxidation of membrane, increasing the membrane permeability, finally causes the death of Microcystis aeruginosa.
Funding OrganizationNanjing University of Information Science and Technology; Peking University; Fudan University; Tsinghua University; Jilin University
Indexed ByEI
Document Type会议论文
Corresponding AuthorLiu, L.(ctguhb@ctgu.edu.cn)
Recommended Citation
GB/T 7714
Liu, Liming ,Li, Lin ,Wu, Zhongxing ,et al. Physiological responses to ferrate (VI) stress in Microcystis aeruginosa[C]:IEEE Computer Society,2011:5153-5156.
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