Occurrence of copper resistant mutants in the toxic cyanobacteria Microcystis aeruginosa: characterisation and future implications in the use of copper sulphate as algaecide

Garcı́a-Villada, Libertad; Rico, Marcos; Altamirano, Marı́a; Sánchez-Martı́n, Laura; López‐Rodas, Victoria; Costas, Eduardo

doi:10.1016/j.watres.2004.01.036

Cited by 157 publications

(75 citation statements)

References 18 publications

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“…It has been reported that some cyanobacteria might develop a resistance to algaecides, and can therefore colonize the lake environment. For instance, García-Villada et al (2004) [59] reported a copper resistant M. aeruginosa mutants, with Cu 2+ resistance to concentrations greater than 5.8 µM (1.44 mg·L −1 copper sulfate pentahydrate in this study). Erickson et al (1994) [60] reported that high values of pH affect both adsorption and absorption of the metal-based algaecides (toxic chemicals) by the cell, thus reducing their toxicity.…”

Section: Statistical Analysessupporting

confidence: 57%

Impacts of Hydrogen Peroxide and Copper Sulfate on the Control of Microcystis aeruginosa and MC-LR and the Inhibition of MC-LR Degrading Bacterium Bacillus sp.

Kansole

Lin

2017

Water

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Abstract:Laboratory batch experiments were carried out to evaluate the impacts of H 2 O 2 and copper sulfate on M. aeruginosa PCC7820, microcystin-LR (MC-LR) and its degrading bacteria Bacillus sp., previously isolated from Hulupi Lake in Taiwan. The study shows that 3 mg·L −1 hydrogen peroxide removed only 9% M. aeruginosa within seven days of exposure, from an initial cell concentration of 2 × 10 6 cells/mL. With copper sulfate, a concentration of 2 mg·L −1 removed 99% M. aeruginosa cells, but showed negligible efficacy in removing 0.05 mg·L −1 MC-LR. At a higher dosage, 20 mg·L −1 H 2 O 2 led to 40% and 95% removal, respectively for MC-LR and M. aeruginosa cells. Copper sulfate and H 2 O 2 were both lethal to Bacillus sp. population, with mortality rate constants of k = 0.04 h −1 and 0.03 h −1 under 1 mg·L −1 copper sulfate and 5 mg·L −1 H 2 O 2 , respectively. H 2 O 2 is competitive in terms of cost, with a capability of degrading organic compounds with the assistance of ultraviolet (UV) light, and it may be considered as an alternative algaecide to copper sulfate in reservoirs for algae growth control.

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Section: Statistical Analysessupporting

confidence: 57%

Impacts of Hydrogen Peroxide and Copper Sulfate on the Control of Microcystis aeruginosa and MC-LR and the Inhibition of MC-LR Degrading Bacterium Bacillus sp.

Kansole

Lin

2017

Water

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“…These toxins can cause harm to humans that interact with the water and may accumulate in the sediment and water column, proving harmful to aquatic animals and plants. There is also evidence that algae are becoming resistant to the application of algaecides like copper sulfate [38].…”

Section: Physical and Chemical Methodsmentioning

confidence: 99%

Sustainable Management of Eutrophic Lakes and Reservoirs

Wagner¹,

Erickson²

2017

JEP

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Eutrophication of lakes and reservoirs is a major water quality problem that poses significant environmental, economic and social threats around the world. Monitoring and managing lakes and reservoirs to prevent or limit eutrophication, therefore, has significant value. The literature has been reviewed to study ecological engineering and management methods that have been and can be applied to improve water quality. Ecological engineering has the potential to be utilized to improve the design and operation of lakes and reservoirs through monitoring and active management of biological, chemical and physical components. Phosphorus concentrations can be reduced by effective and sustainable management practices to improve water quality.

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“…Copper sulphate is a well-known algicide that is used to treat Microcystis algal blooms (Liam et al, 1995;García-Villada et al, 2004). Triton X-100 is used as permeabilising agent that causes damage of the cell membrane such that fluorescent dyes are able to enter into cell and stain a specific cell function during flow cytometric analysis (Hayden et al, 1988).…”

Section: Algicides Disruption Of Microcystis Cell Membranesmentioning

confidence: 99%

“…Copper in the form of cupric ions (Cu 2+ ) lysed the Microcystis cell in the following ways: inhibition of carbon dioxide fixation and PSII activity, inhibition of nitrate uptake and synthesis of nitrate reductase and changes in cell volume (García-Villada et al, 2004). The consequences of copper use results in stripping of the Microcystis cell membrane and the release of intracellular contents including microcystins into the water.…”

Section: Algicides Disruption Of Microcystis Cell Membranesmentioning

confidence: 99%

Light and electron microscope assessment of the lytic activity of Bacillus on Microcystis aeruginosa

Gumbo¹,

J²,

T³

2011

Afr. J. Biotechnol.

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Occurrence of copper resistant mutants in the toxic cyanobacteria Microcystis aeruginosa: characterisation and future implications in the use of copper sulphate as algaecide

Cited by 157 publications

References 18 publications

Impacts of Hydrogen Peroxide and Copper Sulfate on the Control of Microcystis aeruginosa and MC-LR and the Inhibition of MC-LR Degrading Bacterium Bacillus sp.

Impacts of Hydrogen Peroxide and Copper Sulfate on the Control of Microcystis aeruginosa and MC-LR and the Inhibition of MC-LR Degrading Bacterium Bacillus sp.

Sustainable Management of Eutrophic Lakes and Reservoirs

Light and electron microscope assessment of the lytic activity of Bacillus on Microcystis aeruginosa

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