Effect of endocrine disrupters on photosystem II energy fluxes of green algae and cyanobacteria

Perron, Marie-Claude; Juneau, Philippe

doi:10.1016/j.envres.2011.02.013

Cited by 90 publications

(43 citation statements)

References 56 publications

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“…In the present study, C. polykrikoides was also very sensitive to PCB at concentrations <0.05 mg L -1 , but relatively tolerant of exposure to BPA. These observations are entirely consistent with the lack of an endocrine system in dinoflagellate, but their susceptibility to endocrine-disrupting chemicals; for example, photo system II energy fluxes (Perron and Juneau 2011).…”

Section: Metal Toxicity On C Polykrikoidessupporting

confidence: 75%

“…One reason is that algae do not have an endocrine system, and so perhaps may be only marginally affected by exposure to EDCs. Recent studies, however, showed that EDCs affected photo system II energy fluxes of green algae and cyanobacteria (Perron and Juneau 2011). Thus, more analyses of the responses of toxicants to dinoflagellates and marine species are required.…”

Section: Cell Counting and Chl A Estimationmentioning

confidence: 99%

“…As noted previously, since algae do not possess endocrine organs or specific systems, they may be little affected by exposure to EDCs, compared with the adverse abnormal effects of EDCs on higher organisms (VazquezDuhalt et al 2006). Recently, Perron and Juneau (2011) reported that the photosystem II energy flow in green algae such as Chlamydomonas reinhardtii and Pseudokirchneriella subcapitata was affected when exposed to EDCs, including nonylphenol, octylphenol, and estradiol. In the present study, C. polykrikoides was also very sensitive to PCB at concentrations <0.05 mg L -1 , but relatively tolerant of exposure to BPA.…”

Section: Metal Toxicity On C Polykrikoidesmentioning

confidence: 99%

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Evaluation of the sub-lethal toxicity of Cu, Pb, bisphenol A and polychlorinated biphenyl to the marine dinoflagellate Cochlodinium polykrikoides

Ebenezer¹,

2012

ALGAE

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Algae are sensitive to a wide range of pollutants, and are effective bioindicators in ecotoxicity assessments. Here, we evaluated the sub-lethal sensitivity of the marine dinoflagellate Cochlodinium polykrikoides upon exposure to copper (Cu), lead (Pb), bisphenol A (BPA), and Aroclor 1016 (polychlorinated biphenyl, PCB). Toxic effects were assessed by observations of the reduction in cell counts and chlorophyll a levels after exposure to each toxicant. C. polykrikoides displayed dose-dependent, sigmoidal responses when exposed to the tested chemicals. EC 50 -72 h values for Cu, Pb, BPA, and PCB were 12.74, 46.70, 68.15, and 1.07 mg L -1 , respectively. PCB, which is an endocrine-disrupting chemical, was the most sensitive, proving its toxic effect on the dinoflagellate. This study provides baseline data on the toxic effects of commonly used heavy metals and endocrine-disrupting chemicals to a marine dinoflagellate.

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Section: Metal Toxicity On C Polykrikoidessupporting

confidence: 75%

Section: Cell Counting and Chl A Estimationmentioning

confidence: 99%

Section: Metal Toxicity On C Polykrikoidesmentioning

confidence: 99%

See 1 more Smart Citation

Evaluation of the sub-lethal toxicity of Cu, Pb, bisphenol A and polychlorinated biphenyl to the marine dinoflagellate Cochlodinium polykrikoides

Ebenezer¹,

2012

ALGAE

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“…Chlorophyll fluorescence transient was measured using a plant efficiency analyzer (PEA, Hansatech Instruments Ltd., UK) at time intervals of 0.5, 2, 5 and 10 h (Perron and Juneau, 2011). Algal samples (2 mL each) were put into 1-cm diameter vials (2.5 mL each) and placed in darkness to adapt for 15 min at the room temperature.…”

Section: Measurement Of Fluorescence Transientmentioning

confidence: 99%

“…Due to its very sensitive and rapid response to xenobiotics, the ratio of variable and maximal fluorescence, F v /F m , is often used to evaluate the toxic effect of chemicals on microalgae in recent years Perron and Juneau, 2011;Gattullo et al, 2012). Chlorophyll fluorescence transient was measured using a plant efficiency analyzer (PEA, Hansatech Instruments Ltd., UK) at time intervals of 0.5, 2, 5 and 10 h (Perron and Juneau, 2011).…”

Section: Measurement Of Fluorescence Transientmentioning

confidence: 99%

Cellular responses and bioremoval of nonylphenol and octylphenol in the freshwater green microalga Scenedesmus obliquus

Zhou

Peng

Yang

et al. 2013

Ecotoxicology and Environmental Safety

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Synthetic estrogen directly affects fish biomass and may indirectly disrupt aquatic food webs

Hallgren

Nicolle

Hansson

et al. 2014

Environmental Toxicology and Chemistry

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Endocrine-disrupting chemicals are known to alter the fitness of individual organisms via changes in growth, behavior, and reproduction. It is largely unknown, however, whether these effects cascade through the food web and indirectly affect other, less sensitive organisms. The authors present results from a mesocosm experiment whereby the effects of the synthetic estrogen 17α-ethinylestradiol (EE2) were quantified in pelagic communities. Treatment with EE2 at a concentration of 28 ng/L had no large effects on the pelagic communities composed only of phytoplankton and zooplankton. In communities where planktivorous roach (Rutilus rutilus) were also present, however, EE2 caused a significant reduction in fish biomass. Moreover, zooplankton biomass was higher in the EE2 treatments, suggesting that zooplankton may have been released from fish predation. Hence, the direct effect of EE2 on roach may have cascaded down the food web to produce positive indirect effects on zooplankton. This result was supported in complementary foraging experiments with roach, showing reduced foraging performance after exposure to EE2. Despite the observed negative effect of EE2 on roach and the positive indirect effect on zooplankton, these effects did not cascade to phytoplankton, possibly because only copepods, but not cladocerans-the major grazers in these systems-were released from fish predation. The authors conclude that the known reproductive impairment in fish by EE2 in combination with the disturbed foraging performance observed in the present study may be a disadvantage to fish that may result in increasing abundance or biomass of prey such as zooplankton. Hence, EE2 may have consequences for both the structure and function of freshwater communities.

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Effect of endocrine disrupters on photosystem II energy fluxes of green algae and cyanobacteria

Cited by 90 publications

References 56 publications

Evaluation of the sub-lethal toxicity of Cu, Pb, bisphenol A and polychlorinated biphenyl to the marine dinoflagellate Cochlodinium polykrikoides

Evaluation of the sub-lethal toxicity of Cu, Pb, bisphenol A and polychlorinated biphenyl to the marine dinoflagellate Cochlodinium polykrikoides

Cellular responses and bioremoval of nonylphenol and octylphenol in the freshwater green microalga Scenedesmus obliquus

Synthetic estrogen directly affects fish biomass and may indirectly disrupt aquatic food webs

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