Response of Toxic Cyanobacterium Microcystis aeruginosa to Environmental Pollution

Polyak, Yulia; Zaytseva, T. B.; Медведева, Н. Г.

doi:10.1007/s11270-013-1494-4

Cited by 57 publications

(29 citation statements)

References 41 publications

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“…Reported concentrations of nitrogen contamination were 0.03-0.6 mg L −1 in moderately polluted waters and up to 100 mg L −1 in heavily polluted waters [43]. Currently detected concentrations of amoxicillin in aquatic environments were below 622 ng L −1 [44].…”

Section: Discussionmentioning

confidence: 95%

Hormesis Effects of Amoxicillin on Growth and Cellular Biosynthesis of Microcystis aeruginosa at Different Nitrogen Levels

et al. 2014

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Coexisting antibiotic contaminants have potential to regulate cyanobacterial bloom, and the regulation is likely affected by nitrogen supply. A typical cyanobaterium Microcystis aeruginosa was cultured with 0.05-50 mg L(-1) of nitrogen and exposed to 100-600 ng L(-1) of amoxicillin for 7 days. Algal growth was not significantly (p > 0.05) affected by amoxicillin at the lowest nitrogen level of 0.05 mg L(-1), stimulated by 600 ng L(-1) of amoxicillin at a moderate nitrogen level of 0.5 mg L(-1) and enhanced by 100-600 ng L(-1) of amoxicillin at higher nitrogen levels of 5-50 mg L(-1). Amoxicillin affected chlorophyll-a, psbA gene, and rbcL gene in a similar manner as algal growth, suggesting a regulation of algal growth via the photosynthesis system. At each nitrogen level, synthesis of protein and polysaccharides as well as production and release of microcystins (MCs) increased in response to environmental stress caused by amoxicillin. Expression of ntcA and mcyB showed a positive correlation with the total content of MCs under exposure to amoxicillin at nitrogen levels of 0.05-50 mg L(-1). Nitrogen and amoxicillin significantly (p < 0.05) interact with each other on the regulation of algal growth, synthesis of chlorophyll-a, production and release of MCs, and expression of ntcA and mcyB. The nitrogen-dependent stimulation effect of coexisting amoxicillin contaminant on M. aeruginosa bloom should be fully considered during the combined pollution control of M. aeruginosa and amoxicillin.

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Section: Discussionmentioning

confidence: 95%

Hormesis Effects of Amoxicillin on Growth and Cellular Biosynthesis of Microcystis aeruginosa at Different Nitrogen Levels

et al. 2014

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“…This was due to that Cu 2+ are essential micronutrient for Microcystis 51. Additionally, it has also been well documented that low-level contaminants promote Microcystis growth525354. However, the sensitivity or tolerance to heavy metals varies amongst different algae and this variation caused that the beneficial concentration of Cu 2+ for M. flos-aquae and M. viridis inhibited growth of M. aeruginosa and M. wesenbergii .…”

Section: Discussionmentioning

confidence: 99%

Species-dependent variation in sensitivity of Microcystis species to copper sulfate: implication in algal toxicity of copper and controls of blooms

Wei

Tan

et al. 2017

Sci Rep

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Copper sulfate is a frequently used reagent for Microcystis blooms control but almost all the previous works have used Microcystis aeruginosa as the target organism to determine dosages. The aim of this study was to evaluate interspecific differences in the responses of various Microcystis species to varying Cu2+ concentrations (0, 0.05, 0.10, 0.25, and 0.50 mg L−1). The half maximal effective concentration values for M. aeruginosa, M. wesenbergii, M. flos-aquae, and M. viridis were 0.16, 0.09, 0.49, and 0.45 mg L−1 Cu2+, respectively. This showed a species-dependent variation in the sensitivity of Microcystis species to copper sulfate. Malonaldehyde content did not decrease with increasing superoxide dismutase content induced by increasing Cu2+, suggesting that superoxide dismutase failed to reduce Cu2+ damage in Microcystis. Considering the risk of microcystin release when Microcystis membranes are destroyed as a result of Cu2+ treatment and the stimulation effects of a low level of Cu2+ on growth in various species, our results suggest that copper sulfate treatment for Microcystis control could be applied before midsummer when M. aeruginosa and M. viridis are not the dominant species and actual amount of Cu2+ used to control M. wesenbergii should be much greater than 0.10 mg L−1.

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“…For example, public concerns often arise regarding perceived undesirable consequences of using copper-based algaecides for control of M. aeruginosa and some of these perceptions emerge from studies suggesting that loss of M. aeruginosa cell membrane integrity after applications of copper-based algaecides could result in release of intracellular microcystins into surrounding waters (e.g., Kenefick et al, 1993;Jones and Orr, 1994;Touchette et al, 2008;Polyak et al, 2013;Zhou et al, 2013;Fan et al, 2013). Using copper sulfate, Kenefick et al (1993) concentrations higher than commonly used in the treatment of surface waters due to exceptional algal biomass in their study and concluded that the high treatment (0.64 mg Cu as CuSO 4 /L) could lyse cells and release microcystin.…”

Section: Introductionmentioning

confidence: 99%

Effects of two copper compounds on Microcystis aeruginosa cell density, membrane integrity, and microcystin release

Tsai

2015

Ecotoxicology and Environmental Safety

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Response of Toxic Cyanobacterium Microcystis aeruginosa to Environmental Pollution

Cited by 57 publications

References 41 publications

Hormesis Effects of Amoxicillin on Growth and Cellular Biosynthesis of Microcystis aeruginosa at Different Nitrogen Levels

Hormesis Effects of Amoxicillin on Growth and Cellular Biosynthesis of Microcystis aeruginosa at Different Nitrogen Levels

Species-dependent variation in sensitivity of Microcystis species to copper sulfate: implication in algal toxicity of copper and controls of blooms

Effects of two copper compounds on Microcystis aeruginosa cell density, membrane integrity, and microcystin release

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