Effect of Anthracene (ANT) on Growth, Microcystin (MC) Production and Expression of MC Synthetase (mcy) Genes in Microcystis aeruginosa

Bi, Xiangdong; Dai, Wei; Zhou, Qixing; Wang, Ying; Shao-jie, Dong; Zhang, Shulin; Qiao, Xiuting; Zhu, Gangjie

doi:10.1007/s11270-016-2956-2

Cited by 11 publications

(4 citation statements)

References 34 publications

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“…The present study observed similar results as reported in previous studies; that is, the synthesis of the MCs was reduced by H 2 O 2 at the highest exposure dose while enhanced by glyphosate. The increased synthesis of the MCs in Microcystis aeruginosa acts as an adaptive response to mild environmental stress caused by exogenous toxicants, and the response could turn into a reduction in the MC synthesis with increasing exogenous stress (Bi et al 2016). The responses of MC synthesis to the two algaecides indicated a higher toxicity of H 2 O 2 than that of glyphosate.…”

Section: Discussionmentioning

confidence: 99%

“…The increased synthesis of the MCs in Microcystis aeruginosa acts as an adaptive response to mild environmental stress caused by exogenous toxicants, and the response could turn into a reduction in the MC synthesis with increasing exogenous stress (Bi et al. ). The responses of MC synthesis to the two algaecides indicated a higher toxicity of H 2 O 2 than that of glyphosate.…”

Section: Discussionmentioning

confidence: 99%

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Influence of mixed antibiotics on Microcystis aeruginosa during the application of glyphosate and hydrogen peroxide algaecides

Liu

Zhang

et al. 2019

Journal of Phycology

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Antibiotics regulate various physiological functions in cyanobacteria and may interfere with the control of cyanobacterial blooms during the application of algaecides. In this study, Microcystis aeruginosa was exposed to H2O2 and glyphosate for 7 d in the presence of coexisting mixed antibiotics (amoxicillin, spiramycin, tetracycline, ciprofloxacin, and sulfamethoxazole) at an environmentally relevant concentration of 100 ng · L−1. The mixed antibiotics significantly (P < 0.05) alleviated the growth inhibition effect of 15–45 μM H2O2 and 40–60 mg · L−1 glyphosate. According to the increased contents of chlorophyll a and protein, decreased content of malondialdehyde, and decreased activities of superoxide dismutase and glutathione S‐transferase, antibiotics may reduce the toxicity of the two algaecides through the stimulation of photosynthesis and the reduction in oxidative stress. The presence of coexisting antibiotics stimulated the production and release of microcystins in the M. aeruginosa exposed to low concentrations of algaecides and posed an increased threat to aquatic environments. To eliminate the secondary pollution caused by microcystins, high algaecide doses that are ≥45 μM for H2O2 and ≥60 mg · L−1 for glyphosate are recommended. This study provides insights into the ecological hazards of antibiotic contaminants and the best management practices for cyanobacterial removal under combined antibiotic pollution conditions.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Influence of mixed antibiotics on Microcystis aeruginosa during the application of glyphosate and hydrogen peroxide algaecides

Liu

Zhang

et al. 2019

Journal of Phycology

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“…Similarly, ANT reduces growth rate in marine phytoplankton, chlorophyll, and carotenoids (Kottuparambil and Park 2019). Gene expression of Microcystis aeruginosa signi cantly altered by ANT at 20 µg/L (Bi et al 2016a). Reduction in the transport of nutrients and photosynthesis due to the adsorption of ANT on the microalgae cell membrane inhibiting phytoplankton growth (Aksmann and Tukaj 2008).…”

Section: Introductionmentioning

confidence: 99%

Toxicity of Anthracene on Marine Organisms and Development of Seawater Quality Criteria

Karthikeyan,

Marigoudar,

Raja

et al. 2024

Preprint

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Presence of anthracene (ANT) in coastal waters is increasingly being reported and has a profound impact on the marine biota. However, numerical guideline values and toxicity data on marine organisms are lacking. Therefore, seawater quality criteria (SWQC) are developed for ANT based on toxicity data on native species for the first time. Acute and chronic toxicity values were derived on diatoms (Thalassiosira subtilis and Endomoneis paludosa), copepods (Oithona similis and Tisbe furcata), and shrimp (Litopenaeus vannamei). 96h-EC50 and 96h-LC50 were ranged between 23.98 ± 2.4 µg/L and 1.73 ± 0.33 mg/L. Chronic toxicity values such as No Observed Effect Concentrated (NOEC), Lowest Observed Effect Concentration (LOEC), and chronic values ranged from 2.1 ± 0.6 µg/L to 267 ± 58 µg/L, 2.5 ± 0.8 µg/L to 400 ± 7 µg/L and 2.4 ± 0.8 µg/L to 327 ± 71 µg/L respectively. Seawater quality criteria viz. Predicted No Effect Concentration (PNEC), Criterion Continuous Concentration (CCC), and Criterion Maximum Concentration (CMC) were derived using NOECs, chronic values, and acute data. The PNECs are pertinent to sensitive/protected waters, CCC can be applied across the coastal waters and CMC for accidental spill/outfalls/discharge points in enclosed waters. The PNEC, CCC, and CMC are derived as 2.7, 8.8, and 17 µg/L respectively from the Australian Burrlioz SSD whereas the USEPA SSD resulted in 3.89 µg/L of PNEC, 10.7 µg/L of CCC, and 26.7 µg/L of CMC. Sensitive SWQCs were obtained using the Australian Burrlioz SSDs which may ensure the protection of marine life from ANT pollution.

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“…They are readily exposed to toxic waterborne contaminants and tend to reach an equilibrium with pollutants rather rapidly because they are small with a proportionally large surface area 9 . Various studies have reported the toxic effects of PAHs to freshwater algae in terms of growth, photosynthesis, and respiration, with special attention given to interactions with solar and ultraviolet (UV) radiation 10–12 . However, Brack et al .…”

Section: Introductionmentioning

confidence: 99%

Anthracene phytotoxicity in the freshwater flagellate alga Euglena agilis Carter

Kottuparambil

Park

2019

Sci Rep

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The freshwater flagellate alga Euglena agilis Carter was exposed to the polycyclic aromatic hydrocarbon (PAH) anthracene for 96 h under optimal photosynthetically active radiation (PAR), and responses of growth, photosynthetic pigment production, and photosynthetic efficiency were assessed. Anthracene reduced the growth rate (μ) and levels of chlorophyll a (Chl a), chlorophyll b (Chl b), and total carotenoids. The growth rate was more sensitive than photosynthetic parameters, with a median effective concentration (EC50) of 4.28 mg L−1. Between 5 and 15 mg L−1, anthracene inhibited the maximum quantum yield (Fv/Fm) of photosystem II (PSII) and the maximum photosynthetic electron transport rate through PSII (rETRmax) with EC50 values of 14.88 and 11.8 mg L−1, respectively. At all anthracene concentrations, intracellular reactive oxygen species (ROS) were elevated, indicating increased oxidative stress. Anthracene presumably reduced the PSII efficiency of photochemical energy regulation and altered the photochemistry through intracellular ROS formation. Acute exposure to PAHs may induce severe physiological changes in phytoplankton cells, which may influence vital ecological processes within the aquatic environments. Additionally, growth and Chl a content may serve as sensitive risk assessment parameters of anthracene toxicity in water management since EC50 values for both overlap with anthracene levels (8.3 mg L−1) permitted by the US Environmental Protection Agency (USEPA).

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Effect of Anthracene (ANT) on Growth, Microcystin (MC) Production and Expression of MC Synthetase (mcy) Genes in Microcystis aeruginosa

Cited by 11 publications

References 34 publications

Influence of mixed antibiotics on Microcystis aeruginosa during the application of glyphosate and hydrogen peroxide algaecides

Influence of mixed antibiotics on Microcystis aeruginosa during the application of glyphosate and hydrogen peroxide algaecides

Toxicity of Anthracene on Marine Organisms and Development of Seawater Quality Criteria

Anthracene phytotoxicity in the freshwater flagellate alga Euglena agilis Carter

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