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Kim W, Park Y, Jung J, Jeon CO, Toyofuku M, Lee J, Park W. Biological and Chemical Approaches for Controlling Harmful Microcystis Blooms. J Microbiol 2024; 62:249-260. [PMID: 38587591 DOI: 10.1007/s12275-024-00115-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Revised: 01/16/2024] [Accepted: 01/17/2024] [Indexed: 04/09/2024]
Abstract
The proliferation of harmful cyanobacterial blooms dominated by Microcystis aeruginosa has become an increasingly serious problem in freshwater ecosystems due to climate change and eutrophication. Microcystis-blooms in freshwater generate compounds with unpleasant odors, reduce the levels of dissolved O2, and excrete microcystins into aquatic ecosystems, potentially harming various organisms, including humans. Various chemical and biological approaches have thus been developed to mitigate the impact of the blooms, though issues such as secondary pollution and high economic costs have not been adequately addressed. Red clays and H2O2 are conventional treatment methods that have been employed worldwide for the mitigation of the blooms, while novel approaches, such as the use of plant or microbial metabolites and antagonistic bacteria, have also recently been proposed. Many of these methods rely on the generation of reactive oxygen species, the inhibition of photosynthesis, and/or the disruption of cellular membranes as their mechanisms of action, which may also negatively impact other freshwater microbiota. Nevertheless, the underlying molecular mechanisms of anticyanobacterial chemicals and antagonistic bacteria remain unclear. This review thus discusses both conventional and innovative approaches for the management of M. aeruginosa in freshwater bodies.
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Affiliation(s)
- Wonjae Kim
- Laboratory of Molecular Environmental Microbiology, Department of Environmental Science and Ecological Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Yerim Park
- Laboratory of Molecular Environmental Microbiology, Department of Environmental Science and Ecological Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Jaejoon Jung
- Department of Life Science, Chung-Ang University, Seoul, 02841, Republic of Korea
| | - Che Ok Jeon
- Department of Life Science, Chung-Ang University, Seoul, 02841, Republic of Korea
| | - Masanori Toyofuku
- Department of Life and Environmental Sciences, University of Tsukuba, Tsukuba, 305-0006, Japan
| | - Jiyoung Lee
- Division of Environmental Health Sciences, College of Public Health, The Ohio State University, Columbus, OH, 43210, USA
- Department of Food Science and Technology, The Ohio State University, Columbus, OH, 43210, USA
| | - Woojun Park
- Laboratory of Molecular Environmental Microbiology, Department of Environmental Science and Ecological Engineering, Korea University, Seoul, 02841, Republic of Korea.
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Lin Y, Chen A, Luo S, Kuang X, Li R, Lepo JE, Gu JD, Zeng Q, Shao J. Cyanobacterial bloom mitigation by sanguinarine and its effects on aquatic microbial community structure. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 253:497-506. [PMID: 31330342 DOI: 10.1016/j.envpol.2019.07.060] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Revised: 06/28/2019] [Accepted: 07/11/2019] [Indexed: 06/10/2023]
Abstract
Sanguinarine has strong inhibitory effects against the cyanobacterium Microcystis aeruginosa. However, previous studies were mainly limited to laboratory tests. The efficacy of sanguinarine for mitigation of cyanobacterial blooms under field conditions, and its effects on aquatic microbial community structure remain unknown. To elucidate these issues, we carried out in situ cyanobacterial bloom mitigation tests. Our results showed that sanguinarine decreased population densities of the harmful cyanobacteria Microcystis and Anabaena. The inhibitory effects of sanguinarine on these cyanobacteria lasted 17 days, after which the harmful cyanobacteria recovered and again became the dominant species. Concentrations of microcystins in the sanguinarine treatments were lower than those of the untreated control except during the early stage of the field test. The results of community DNA pyrosequencing showed that sanguinarine decreased the relative abundance of the prokaryotic microorganisms Cyanobacteria, Actinobacteria, Planctomycetes and eukaryotic microorganisms of Cryptophyta, but increased the abundance of the prokaryotic phylum Proteobacteria and eukaryotic microorganisms within Ciliophora and Choanozoa. The shifting of prokaryotic microbial community in water column was directly related to the toxicity of sanguinarine, whereas eukaryotic microbial community structure was influenced by factors other than direct toxicity. Harmful cyanobacteria mitigation efficacy and microbial ecological effects of sanguinarine presented in this study will inform the broad application of sanguinarine in cyanobacteria mitigation.
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Affiliation(s)
- Yiqing Lin
- College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, PR China; Hunan Engineering & Technology Research Center for Irrigation Water Purification, Hunan Agricultural University, Changsha, 410128, PR China
| | - Anwei Chen
- College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, PR China
| | - Si Luo
- College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, PR China
| | - Xiaolin Kuang
- College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, PR China
| | - Renhui Li
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, PR China
| | - Joe Eugene Lepo
- Department of Biology, Center for Environmental Diagnostics and Bioremediation, University of West Florida, Florida, 32514, USA
| | - Ji-Dong Gu
- Laboratory of Environmental Microbiology and Toxicology, School of Biological Sciences, The University of Hong Kong, Hong Kong, PR China
| | - Qingru Zeng
- College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, PR China
| | - Jihai Shao
- College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, PR China; Hunan Engineering & Technology Research Center for Irrigation Water Purification, Hunan Agricultural University, Changsha, 410128, PR China.
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Xiao X, Li C, Huang H, Lee YP. Inhibition effect of natural flavonoids on red tide alga Phaeocystis globosa and its quantitative structure-activity relationship. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:23763-23776. [PMID: 31209750 DOI: 10.1007/s11356-019-05482-7] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Revised: 04/01/2019] [Accepted: 05/14/2019] [Indexed: 06/09/2023]
Abstract
Red tides that occur off coasts have become a worldwide phenomenon over the past decades. In order to mitigate the damage of the red tides on the aquatic ecosystems, it is crucial to develop a method for predicting algicidal activities that requires less labor and time, and most importantly, this method can quickly screen potential algicides to control red tides. In this study, we have investigated the algicidal activity of 19 natural flavonoids against a typical red tide alga, Phaeocystis globosa. Our results indicate that after 5 days of flavonoid exposure, the half inhibition concentrations (IC50) ranged from 0.068 to 3.065 mg L-1, which showed the strong algicidal activities of the flavonoids. Furthermore, quantitative structure activity relationship (QSAR) model has been carried out between negative scale logarithm (pIC50) of the flavonoids and the corresponding molecular descriptors. The developed model was validated, both internally and externally, which displayed statistical robustness (R2 = 0.867, p = 0.0002, Q2LOO = 0.825, RMSEC = 0.182, Q2extF3 = 0.896, RMSEP = 0.161, CCC = 0.935). This indicates that the developed model was obtained successfully with satisfactory predictability and robustness for the future rapid screening of natural flavonoids with high inhibition activity on the red tide alga growth. Moreover, the main descriptors in the QSAR model were the molar refractivity, partition coefficient, lowest unoccupied molecular orbital, and highest occupied molecular orbital, illustrating that the molecular electro-chemical characteristics are significant in the algicidal actions of the flavonoids. Graphical abstract Red tides frequently occur worldwide and have become a global environment problem. Flavonoids showed great potential in allelopathic control of the excessive growth of red tide algae. In this study, the algicidal activity of 19 natural flavonoids was investigated on a typical red tide organism Phaeocystis globosa. Futhermore, we applied the quantitative structure-activity relationship (QSAR) model to the experimental data. The model between molecular descriptors of flavonoids and their antialgal activity displays statistical robustness, and 4 of 45 selected molecular descriptors were obtained by regression of training set. The numbers in the figure represent the half inhibition concentration (IC50) of flavonoids. Our results show that the algicidal activity of flavonoids is closely related to molar refraction, partition coefficient, lowest unoccupied molecular orbital, and highest occupied molecular orbital. The QSAR model can efficaciously predict the algicidal activity and provide insights into the inhibitory mechanisms of flavonoids.
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Affiliation(s)
- Xi Xiao
- Ocean College, Zhejiang University, Zhou Shan, 316021, People's Republic of China
- Key Laboratory of Integrated Marine Monitoring and Applied Technologies for Harmful Algal Blooms, S.O.A., MATHAB, Shanghai, People's Republic of China
- Laboratory of Marine Ecosystem and Biogeochemistry, Second Institute of Oceanography, MNR, Hangzhou, 310012, China
| | - Chao Li
- Ocean College, Zhejiang University, Zhou Shan, 316021, People's Republic of China
| | - Haomin Huang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, People's Republic of China.
- College of Environmental & Resource Sciences, Zhejiang University, Hangzhou, 310012, People's Republic of China.
| | - Ying Ping Lee
- Ocean College, Zhejiang University, Zhou Shan, 316021, People's Republic of China
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Sinang SC, Daud N, Kamaruddin N, Poh KB. Potential growth inhibition of freshwater algae by herbaceous plant extracts. ACTA ACUST UNITED AC 2019. [DOI: 10.1016/j.chnaes.2018.12.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Zhang KM, Shen Y, Zhou XQ, Fang YM, Liu Y, Ma LQ. Photosynthetic electron-transfer reactions in the gametophyte of Pteris multifida reveal the presence of allelopathic interference from the invasive plant species Bidens pilosa. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2016; 158:81-8. [DOI: 10.1016/j.jphotobiol.2016.02.026] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2015] [Revised: 01/24/2016] [Accepted: 02/15/2016] [Indexed: 10/22/2022]
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Zhang X, Song T, Ma H, Li L. Physiological response of Microcystis aeruginosa to the extracellular substances from an Aeromonas sp. RSC Adv 2016. [DOI: 10.1039/c6ra17917g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Physiological responses of M. aeruginosa to different amounts of the extracellular substances from Aeromonas sp. were studied, including the changes of extracellular polysaccharides content, enzyme activity and malondialdehyde content.
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Affiliation(s)
- Xing Zhang
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse
- School of Environmental Science and Engineering
- Shandong University
- Jinan 250100
- China
| | - Tao Song
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse
- School of Environmental Science and Engineering
- Shandong University
- Jinan 250100
- China
| | - Hao Ma
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse
- School of Environmental Science and Engineering
- Shandong University
- Jinan 250100
- China
| | - Li Li
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse
- School of Environmental Science and Engineering
- Shandong University
- Jinan 250100
- China
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Huang H, Xiao X, Ghadouani A, Wu J, Nie Z, Peng C, Xu X, Shi J. effects of natural flavonoids on photosynthetic activity and cell integrity in Microcystis aeruginosa. Toxins (Basel) 2015; 7:66-80. [PMID: 25584428 PMCID: PMC4303814 DOI: 10.3390/toxins7010066] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Accepted: 12/31/2014] [Indexed: 11/16/2022] Open
Abstract
Flavonoids are natural polyphenolic compounds produced by many aquatic plants and released in their environments. In this study, the effects of several aquatic flavonoids on cyanobacterial Microcystis aeruginosa, especially in relation to the cell growth, photosynthetic activity, cell morphology, and cell membrane integrity, were investigated. Significant growth inhibition was observed when the cyanobacteria were exposed to three flavonoids, namely, 5,4'-dihydroxyflavone (DHF), apigenin, and luteolin. Luteolin reduced the effective quantum yield, photosynthetic efficiency, and maximal electron transport rate by 70%, 59% and 44%, respectively, whereas 5,4'-DHF and apigenin slightly affected these parameters, which implies that luteolin disrupts the photosynthetic system. Moreover, 5,4'-DHF and apigenin compromised the membrane integrity, and induced membrane depolarization in 52% and 38%, and permeabilization in 30% and 44% of the cells, respectively. The 5,4'-DHF and apigenin showed more pronounced effects on M. aeruginosa morphology and membrane integrity, compared to the luteolin. These results suggest that flavonoids could have significant effects on growth and physiological functions in cyanobacterial species.
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Affiliation(s)
- Haomin Huang
- College of Environmental & Resource Science (CERS), Zhejiang University, Hangzhou 310058, Zhejiang, China.
| | - Xi Xiao
- College of Environmental & Resource Science (CERS), Zhejiang University, Hangzhou 310058, Zhejiang, China.
| | - Anas Ghadouani
- Aquatic Ecology and Ecosystem Studies, M015, School of Civil, Environmental Systems and Mining Engineering, the University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia.
| | - Jiaping Wu
- Ocean College, Zhejiang University, Hangzhou 310058, Zhejiang, China.
| | - Zeyu Nie
- College of Environmental & Resource Science (CERS), Zhejiang University, Hangzhou 310058, Zhejiang, China.
| | - Cheng Peng
- College of Environmental & Resource Science (CERS), Zhejiang University, Hangzhou 310058, Zhejiang, China.
| | - Xinhua Xu
- College of Environmental & Resource Science (CERS), Zhejiang University, Hangzhou 310058, Zhejiang, China.
| | - Jiyan Shi
- College of Environmental & Resource Science (CERS), Zhejiang University, Hangzhou 310058, Zhejiang, China.
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Shao J, Li R, Lepo JE, Gu JD. Potential for control of harmful cyanobacterial blooms using biologically derived substances: problems and prospects. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2013; 125:149-155. [PMID: 23660535 DOI: 10.1016/j.jenvman.2013.04.001] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2012] [Revised: 03/23/2013] [Accepted: 04/03/2013] [Indexed: 06/02/2023]
Abstract
Water blooms of cyanobacteria have posed a worldwide environmental threat and a human health hazard in recent decades. Many biologically derived (but non-antibiotic) bioactive substances are known to inhibit the growth of aquatic bloom-forming cyanobacteria. Some of these biologically derived substances (BDSs) have no or low toxicity to aquatic animals and humans. Most BDSs are easily biodegradable in aquatic environments. These characteristics indicate that they may have potential for control and removal of harmful algae. However, BDSs also have the disadvantages of high cost of preparation, and possible damage to non-target aquatic organisms, and sometimes, low efficiency of algae removal. The ecological risks of most BDSs are still unknown. Here, we review recent research progress relative to the inhibitory effects of BDSs on cyanobacteria, and critically analyze the potential of BDSs as algicides with an emphasis on possible problems during the process of controlling harmful cyanobacteria. We suggest avenues of study to enhance effective use of BDSs in controlling of cyanobacterial blooms; these include guidelines for isolation and characterization of new effective BDSs, exploiting the synergistic effects of BDSs, the merits of controlling harmful cyanobacteria at the early stages of proliferation and evaluation of ecological risks of BDSs.
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Affiliation(s)
- Jihai Shao
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, PR China.
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