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Article

The Detrimental Effect of High Salinity on the Growth and Microcystins Contamination of Microcystis aeruginosa

by 1,2, 1,2, 3,4, 1,2, 1,2 and 1,2,*
1
Zhejiang Provincial Key Laboratory for Subtropical Water Environment and Marine Biological Resources Protection, Wenzhou University, Wenzhou 325035, China
2
National and Local Joint Engineering Research Center of Ecological Treatment Technology for Urban Water Pollution, Wenzhou University, Wenzhou 325035, China
3
College of Agricultural Science and Engineering, Hohai University, Nanjing 210098, China
4
Anhui Provincial Key Laboratory of Environmental Pollution Control and Resource Reuse, Anhui Jianzhu University, Hefei 230009, China
*
Author to whom correspondence should be addressed.
Academic Editor: Sunny Jiang
Water 2022, 14(18), 2871; https://doi.org/10.3390/w14182871
Received: 10 August 2022 / Revised: 11 September 2022 / Accepted: 13 September 2022 / Published: 14 September 2022
(This article belongs to the Section Water Quality and Contamination)
The occurrence of cyanobacterial species, especially toxic ones, poses a great threat to coastal and estuary areas. In this study, the toxigenic Microcystis aeruginosa (M. aeruginosa) FACHB-905 was exposed to BG-11 medium with different salinities (1, 4, 7, 10 and 15 ppt) to investigate the physiological responses of this species in terms of oxidative stress, chl a fluorescence and microcystins (MCs) contamination. The results showed that low salinity (≤7 ppt) favored the electron transfer of photosystem II, which promoted the growth and photosynthesis of M. aeruginosa and induced MCs production. However, increased salinity (≥10 ppt) suppressed the growth and photosynthesis of M. aeruginosa and aggravated the oxidative stress of the strain. Salinity of 15 ppt reduced MCs contamination and caused irreversible damage to the photosynthetic system of M. aeruginosa, leading to the lysis and death of algal cells. These results indicated that changes in salinity exerted important regulations on the growth and MCs contamination of the toxic M. aeruginosa, which may provide a reference for the risk assessment of the harmful cyanobacterial species in the coastal and estuary areas. View Full-Text
Keywords: salinity; Microcystis aeruginosa; photosynthesis; microcystins; oxidative stress salinity; Microcystis aeruginosa; photosynthesis; microcystins; oxidative stress
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MDPI and ACS Style

Qiu, Y.; Ma, Z.; Liu, X.; Zheng, R.; Xiao, Y.; Wang, M. The Detrimental Effect of High Salinity on the Growth and Microcystins Contamination of Microcystis aeruginosa. Water 2022, 14, 2871. https://doi.org/10.3390/w14182871

AMA Style

Qiu Y, Ma Z, Liu X, Zheng R, Xiao Y, Wang M. The Detrimental Effect of High Salinity on the Growth and Microcystins Contamination of Microcystis aeruginosa. Water. 2022; 14(18):2871. https://doi.org/10.3390/w14182871

Chicago/Turabian Style

Qiu, Yu, Zengling Ma, Xiang Liu, Ranran Zheng, Yang Xiao, and Min Wang. 2022. "The Detrimental Effect of High Salinity on the Growth and Microcystins Contamination of Microcystis aeruginosa" Water 14, no. 18: 2871. https://doi.org/10.3390/w14182871

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