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Lu Y, Jiang X, Xu H, Liu C, Song Y, Pan K, Wang L, Du L, Liu H. Effects of 4-tert-butylpyrocatechol and tea polyphenol on growth, physiology and antioxidant responses in Microcystis aeruginosa. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2023; 260:106541. [PMID: 37172458 DOI: 10.1016/j.aquatox.2023.106541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Revised: 04/10/2023] [Accepted: 04/12/2023] [Indexed: 05/15/2023]
Abstract
Global warming has increased the frequency of Microcystis aeruginosa blooms, leading to the deterioration of water quality and loss of biodiversity. Therefore, developing effective strategies for controlling M. aeruginosa blooms has become an important research topic. Plant extracts, 4‑tert-butylpyrocatechol (TBC) and tea polyphenol (TP) are commonly used for water purification and to increase fish immunity, which have great potential to inhibit cyanobacterial blooms. The inhibitory effects of TBC and TP on M. aeruginosa were investigated in terms of growth characteristics, cell membrane morphology, physiological, photosynthetic activities, and antioxidant enzymes activities. The results showed that TBC and TP inhibited the growth of M. aeruginosa by decreasing the chlorophyll fluorescence transients or increasing the antioxidant enzymes activities of M. aeruginosa. TBC damaged the cell morphology of M. aeruginosa, reduced extracellular polysaccharides and protein contents, and up-regulated the antioxidant activity-related gene (sod and gsh) expressions of M. aeruginosa. TP significantly decreased the photosynthetic pigment content, influenced the phycobiliprotein content, and strongly down-regulated the photosynthesis-related gene (psbA, psaB, and rbcL) relative expressions of M. aeruginosa. TBC caused significant oxidative stress, dysfunction of physiological metabolic processes, and damaged crucial biomacromolecules (e.g., lipids, proteins and polysaccharides), prompted the loss of cell integrity, ultimately leading to the death of M. aeruginosa. However, TP depressed photosynthetic activities and consequently inhibited the transfer of electrons, affected the electron transfer chain, decreased the photosynthetic efficiency, and eventually caused the death of M. aeruginosa cells. Our study showed the inhibitory effects and algicidal mechanisms of TBC and TP on M. aeruginosa, and provide a theoretical basis for restrain the overgrowth of M. aeruginosa.
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Affiliation(s)
- Yitong Lu
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Xinxin Jiang
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Hongzhou Xu
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Chengrong Liu
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Yanzhen Song
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Kuiquan Pan
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Lixin Wang
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Liang Du
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Haixia Liu
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, China.
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Nan Y, Guo P, Xing H, Chen S, Hu B, Liu J. Effects of suspended particles in the Jinjiang River Estuary on the physiological and biochemical characteristics of Microcystis flos-aquae. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:56687-56699. [PMID: 36929250 DOI: 10.1007/s11356-023-26367-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Accepted: 03/06/2023] [Indexed: 06/18/2023]
Abstract
The effects of different concentrations (100, 150, 200, 250 mg/L) and different particle sizes (0-75 μm, 75-120 μm, 120-150 μm, 150-500 μm) on the soluble protein content, superoxide dismutase (SOD) and catalase (CAT) activity, malondialdehyde (MDA) content, chlorophyll a (Chla) content, and photosynthetic parameters of Microcystis flos-aquae were studied, and the mechanism of the effect of suspended particulate matter on the physiology and biochemistry of Microcystis flos-aquae was discussed. The results showed that the soluble protein content of Microcystis flos-aquae did not change noticeably after being stressed by suspended particles of different concentrations/diameters. The SOD activity of Microcystis flos-aquae first increased and then decreased with increasing suspended particulate matter concentrations. The SOD activity of Microcystis flos-aquae reached 28.03 U/mL when the concentration of suspended particulate matter was 100 mg/L. The CAT activity of Microcystis flos-aquae increased with increasing concentrations of suspended particles and reached a maximum value of 12.45 U/mg prot in the 250 mg/L concentration group, showing a certain dose effect. Small particles had a more significant effect on SOD, CAT, and MDA in Microcystis flos-aquae than large particles. The larger the concentration was and the smaller the particle size was, the stronger the attenuation of light and the lower the content of Chla. Both the maximum quantum yield of PSII (Fv/Fm) and the potential photosynthetic activity of PSII (Fv/F0) of Microcystis flos-aquae increased at first and then decreased under different concentrations/sizes of suspended particles. The relative electron transfer rate gradually returned to a normal level over time. There was no significant difference in the initial slope (α) value between the treatment group and the control group, and the maximum photo synthetic rate (ETRmax) and the semilight saturation (Ik) decreased.
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Affiliation(s)
- Yiting Nan
- Department of Environmental Science and Engineering, College of Chemical Engineering, Huaqiao University, Xiamen, 361021, Fujian, China
- Institute of Environment and Resources Technology, Huaqiao University, Xiamen, 361021, China
| | - Peiyong Guo
- Department of Environmental Science and Engineering, College of Chemical Engineering, Huaqiao University, Xiamen, 361021, Fujian, China.
- Institute of Environment and Resources Technology, Huaqiao University, Xiamen, 361021, China.
| | - Hui Xing
- Department of Environmental Science and Engineering, College of Chemical Engineering, Huaqiao University, Xiamen, 361021, Fujian, China
- Institute of Environment and Resources Technology, Huaqiao University, Xiamen, 361021, China
| | - Sijia Chen
- Department of Environmental Science and Engineering, College of Chemical Engineering, Huaqiao University, Xiamen, 361021, Fujian, China
- Institute of Environment and Resources Technology, Huaqiao University, Xiamen, 361021, China
| | - Bo Hu
- Department of Environmental Science and Engineering, College of Chemical Engineering, Huaqiao University, Xiamen, 361021, Fujian, China
- Institute of Environment and Resources Technology, Huaqiao University, Xiamen, 361021, China
| | - Jie Liu
- Department of Environmental Science and Engineering, College of Chemical Engineering, Huaqiao University, Xiamen, 361021, Fujian, China
- Institute of Environment and Resources Technology, Huaqiao University, Xiamen, 361021, China
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Xie L, Ma Z, Yang G, Huang Y, Wen T, Deng Y, Sun J, Zheng S, Wu F, Huang K, Shao J. Study on the inhibition mechanism of eucalyptus tannins against Microcystis aeruginosa. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 249:114452. [PMID: 38321671 DOI: 10.1016/j.ecoenv.2022.114452] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 11/25/2022] [Accepted: 12/16/2022] [Indexed: 02/08/2024]
Abstract
Microcystis aeruginosa is the competitively dominant algal species in eutrophic waters and poses a serious threat to the aquatic ecological environment. To investigate the effects of eucalyptus tannins (TFL) and black water in eucalyptus plantations on M. aeruginosa, this study exposed M. aeruginosa to different concentrations (0 (control), 20, 50, 80, 110, and 140 mg L-1) of tannic acid (TA; hydrolyzed tannins, HT; reagent tannin), epigallocatechin gallate (EGCG; condensed tannins, CT; reagent tannin), eucalyptus tannins (TFL, complex tannin) and mixed TFL + Fe3+ solution (tannin: Fe3+ molar ratio = 1:10). The cell density, chlorophyll-a (Chl-a) content, superoxide dismutase (SOD) activity, malondialdehyde (MDA) and soluble protein (SP) contents of algae under tannin stress were determined, and the algal cell density treated with under the combination of TFL and Fe3+ was determined. The results showed a reduction in the Chl-a content of algal cells, which inhibited photosynthesis; leading to membrane lipid peroxidation; and the complexation of soluble proteins resulting in blocked protein synthesis were the main mechanisms by which tannins inhibited the growth of M. aeruginosa. TFL achieved the same inhibition of algal cells as the tannin reagent at the same concentration. At 4 d, TFL at 80 mg L-1 and above could achieve more than 54.87 % algal density inhibition. The inhibition rate of 80 mg L-1 and above TFL + Fe3+ on algal density was more than 75 %, indicating that TFL + Fe3+ had a stronger inhibitory effect on algal density. The results may facilitate the resource utilization of eucalyptus harvesting residues, explorations of the potential application of eucalyptus tannins in the control of M. aeruginosa, and provide new ideas for ecological algal inhibition in eucalyptus plantations.
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Affiliation(s)
- Liujun Xie
- Guangxi Key Laboratory of Forest Ecology and Conservation, College of Forestry, Guangxi University, Nanning 530004, China
| | - Zhengxin Ma
- Guangxi Key Laboratory of Forest Ecology and Conservation, College of Forestry, Guangxi University, Nanning 530004, China
| | - Gairen Yang
- Guangxi Key Laboratory of Forest Ecology and Conservation, College of Forestry, Guangxi University, Nanning 530004, China.
| | - Yuhan Huang
- Guangxi Key Laboratory of Forest Ecology and Conservation, College of Forestry, Guangxi University, Nanning 530004, China
| | - Tianyi Wen
- Guangxi Key Laboratory of Forest Ecology and Conservation, College of Forestry, Guangxi University, Nanning 530004, China
| | - Yusong Deng
- Guangxi Key Laboratory of Forest Ecology and Conservation, College of Forestry, Guangxi University, Nanning 530004, China
| | - Jingchao Sun
- Guangxi Key Laboratory of Forest Ecology and Conservation, College of Forestry, Guangxi University, Nanning 530004, China
| | - Siyu Zheng
- Guangxi Key Laboratory of Forest Ecology and Conservation, College of Forestry, Guangxi University, Nanning 530004, China
| | - Fangfang Wu
- Guangxi Key Laboratory of Forest Ecology and Conservation, College of Forestry, Guangxi University, Nanning 530004, China
| | - Kai Huang
- China Guangxi Hydraulic Research Institute, Nanning 530023, China; Guangxi Key Laboratory of Water Engineering Materials and Structures Nanning, 530023, China
| | - Jinhua Shao
- China Guangxi Hydraulic Research Institute, Nanning 530023, China; Guangxi Key Laboratory of Water Engineering Materials and Structures Nanning, 530023, China
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Zong P, Liu Y, Chen H, Miao S, Lian K, Li C, Zhang H, Zhang M. Inhibitory mechanism of nano-copper carbon composite on Microcystis aeruginosa. ALGAL RES 2022. [DOI: 10.1016/j.algal.2022.102877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Hernández-Zamora M, Santiago-Martínez E, Martínez-Jerónimo F. Toxigenic Microcystis aeruginosa (Cyanobacteria) affects the population growth of two common green microalgae: Evidence of other allelopathic metabolites different to cyanotoxins. JOURNAL OF PHYCOLOGY 2021; 57:1530-1541. [PMID: 33988856 DOI: 10.1111/jpy.13185] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Accepted: 04/27/2021] [Indexed: 06/12/2023]
Abstract
Agriculture runoffs and discharge of wastewaters are the major causes of eutrophication. Although eutrophication could promote the thriving of any phytoplankter, harmful algal blooms (HABs) are dominated frequently by cyanobacteria. Currently, HABs dominated by the toxigenic cyanobacterium Microcystis aeruginosa in lakes and reservoirs are the main environmental concerns worldwide. This study aimed to determine how M. aeruginosa (Ma) modifies the population growth of Pseudokirchneriella subcapitata (Ps) and Ankistrodesmus falcatus (Af). Growth kinetics were determined for each species and in the combinations: Ps-Ma, Af-Ma, Af-Ps, and Ps-Af-Ma. At the end of experiments, photosynthetic pigments, phycobiliproteins, and microcystins were quantified. A logistic equation significantly described the growth trend for all of the tested species, enabling the identification of negative effects on early stages in the population growth of co-cultures with the cyanobacterium; in addition, the interaction effects on the growth rate and in the maximum attainable population density were determined. The biomasses of A. falcatus and P. subcapitata were significantly higher when cultured individually than in all of the combinations with the cyanobacterium. The concentrations of chlorophyll a and b, as well as carotenoids, were lower in combined cultures, but phycobiliprotein content in the cultures with M. aeruginosa was not significantly affected. Microcystis aeruginosa negatively affected the growth of the microalgae, but A. falcatus was significantly more inhibited than P. subcapitata; however, microcystin concentrations were significantly reduced in the co-cultures with microalgae. These results could help to explain the displacements of microalgae when cyanobacteria are present, giving rise to cyanobacterial blooms in eutrophic freshwaters.
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Affiliation(s)
- Miriam Hernández-Zamora
- Laboratorio de Hidrobiología Experimental, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prolongación de Carpio y Plan de Ayala s/n, Colonia Santo Tomás, C.P. 11340, Mexico City, CDMX, Mexico
| | - Elisa Santiago-Martínez
- Laboratorio de Hidrobiología Experimental, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prolongación de Carpio y Plan de Ayala s/n, Colonia Santo Tomás, C.P. 11340, Mexico City, CDMX, Mexico
| | - Fernando Martínez-Jerónimo
- Laboratorio de Hidrobiología Experimental, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prolongación de Carpio y Plan de Ayala s/n, Colonia Santo Tomás, C.P. 11340, Mexico City, CDMX, Mexico
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Qiu Y, Luo Y, Zhang T, Du X, Wang Z, Liu F, Liang H. Comparison between permanganate pre-oxidation and persulfate/iron(II) enhanced coagulation as pretreatment for ceramic membrane ultrafiltration of surface water contaminated with manganese and algae. ENVIRONMENTAL RESEARCH 2021; 196:110942. [PMID: 33711319 DOI: 10.1016/j.envres.2021.110942] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Revised: 12/31/2020] [Accepted: 02/22/2021] [Indexed: 06/12/2023]
Abstract
Concurrent presence of algae and manganese (Mn) in water poses a significant challenge for water treatment. This study compared the treatment efficiency of Mn-containing and algae-laden water using either permanganate pre-oxidation (KMnO4) or persulfate/iron(II) (PMS/Fe2+) enhanced coagulation as pretreatment for ceramic membrane ultrafiltration. The results showed that KMnO4 pre-oxidation achieved a slightly more effective Mn removal, and was almost unaffected by the initial dissolved organic carbon (DOC) concentrations. PMS/Fe2+ removed UV254 more efficiently (above 90% at a dose of 0.25 mmol/L), compared with KMnO4 (less than 60% UV254 removal). According to X-ray photoelectron spectroscopy (XPS) analysis of aggregates, both KMnO4 and Fe2+/PMS oxidation resulted in the formation of MnO2 precipitate. Electron paramagnetic resonance(EPR) analysis demonstrated that only the reactors dosed with PMS/Fe2+ were able to generate the highly reactive hydroxyl radical(·OH). The production of ·OH caused significant rupture of algal cells and thus higher algal removal compared to the treatment with KMnO4 (whereby insignificant cell breakage was observed). The cell rupture resulted in higher amounts of organic matter released in the systems containing PMS/Fe2+, as demonstrated by excitation-emission matrix (EEM) and protein analysis. Despite the elevated level of organic matter, adding PMS/Fe2+ was found to notably mitigate membrane fouling due to the formation of large flocs (311-533 μm) as well as the elimination of major ceramic membrane foulants, i.e. humic substances.
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Affiliation(s)
- Yongting Qiu
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou, 510006, PR China.
| | - Yunlong Luo
- Global Centre for Environmental Remediation (GCER), University of Newcastle, Callaghan, NSW, 2308, Australia.
| | - Tianxiang Zhang
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou, 510006, PR China.
| | - Xing Du
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou, 510006, PR China.
| | - Zhihong Wang
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou, 510006, PR China.
| | - Feng Liu
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou, 510006, PR China.
| | - Heng Liang
- State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin, 150090, PR China.
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Rzymski P, Klimaszyk P, Jurczak T, Poniedziałek B. Oxidative Stress, Programmed Cell Death and Microcystin Release in Microcystis aeruginosa in Response to Daphnia Grazers. Front Microbiol 2020; 11:1201. [PMID: 32625177 PMCID: PMC7311652 DOI: 10.3389/fmicb.2020.01201] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Accepted: 05/12/2020] [Indexed: 01/01/2023] Open
Abstract
There is increasing evidence that programmed cell death (PCD) in cyanobacteria is triggered by oxidative stress and that it contributes to the survival of the cyanobacterial population such as Microcystis aeruginosa. At the same time, microcystins (MCs) released during cell lysis have been implicated in colony formation (enabled by the release of polysaccharides) in M. aeruginosa – a strategy that allows the effect of a stressor, including grazing to be avoided or decreased. This experimental research has explored whether extracts of Daphnia magna and Daphnia cucullata (corresponding to 5, 25, 50, and 100 individuals per liter) reveal the effect on the growth, intracellular reactive oxygen species (ROS) content, lipid peroxidation, PCD, MC-LR release, and bound exopolysaccharide (EPS) level in M. aeruginosa during 7 days of exposure. As demonstrated, extracts of both daphnids induced dose-dependent growth inhibition, increase in ROS levels, lipid peroxidation, and PCD. Moreover, the release of MC-LR and an increase in the bound EPS fraction were observed in treated cultures. Generally, the greatest effects were observed under the influence of D. magna extracts. The study indicates that grazer presence can potentially trigger a series of events in the Microcystis population, with cells undergoing oxidative stress-induced PCD associated with MC release, which in turn increases EPS production by intact cells. As argued, this strategy is likely to have evolved in response to abiotic stressors, since both PCD and synthesis of MC in cyanobacteria predate the metazoan lineage. Nevertheless, it may still provide a benefit for the survival of the MC-producing M. aeruginosa population under grazer pressure.
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Affiliation(s)
- Piotr Rzymski
- Department of Environmental Medicine, Poznan University of Medical Sciences, Poznan´, Poland
| | - Piotr Klimaszyk
- Department of Water Protection, Adam Mickiewicz University, Poznan´, Poland
| | - Tomasz Jurczak
- UNESCO Chair on Ecohydrology and Applied Ecology, University of Lodz, Łódz´, Poland
| | - Barbara Poniedziałek
- Department of Environmental Medicine, Poznan University of Medical Sciences, Poznan´, Poland
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