Validation of photosynthetic-fluorescence parameters as biomarkers for isoproturon toxic effect on alga Scenedesmus obliquus

Dewez, David; Didur, Olivier; Vincent-Héroux, Jonathan; Popovic, Radovan

doi:10.1016/j.envpol.2007.03.002

Cited by 54 publications

(23 citation statements)

References 32 publications

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“…1B), but the significant difference between the treatment and control was observed after 3 d exposure. These results were consistent with the previous reports with other herbicides or algae [9,16,39].…”

Section: Effect Of Isoproturon On Algal Growthsupporting

confidence: 95%

“…For analyzing phytotoxicity of algae under exposure to organic xenobiotics, the cell density representative of growth status is often used as a valid biomarker [9,10,37,38], because it represents an integrating parameter showing pesticide inhibitory effect on all cellular metabolism [16]. In this study, C. reinhardtii was treated with IPU at 0, 5, 15, 25, 35, and 50 g L −1 .…”

Section: Effect Of Isoproturon On Algal Growthmentioning

confidence: 99%

“…Early studies indicated that isoproturon was designed to block the photosystem electron transport in thylakoids at the photosystem II by binding specifically to the quinone site on the D1 protein (dopamine receptor) of the membrane [14,15]. Recent studies have shown that IPU could also be accumulated by other non-target plants and exert detrimental effects on these plants [9,[16][17][18].…”

Section: Introductionmentioning

confidence: 98%

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Phytotoxicity, bioaccumulation and degradation of isoproturon in green algae

Miao

et al. 2012

Journal of Hazardous Materials

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Section: Effect Of Isoproturon On Algal Growthsupporting

confidence: 95%

Section: Effect Of Isoproturon On Algal Growthmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

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Phytotoxicity, bioaccumulation and degradation of isoproturon in green algae

Miao

et al. 2012

Journal of Hazardous Materials

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“…Studies reveal that fluorescence yields of plants were closely related to the photosynthetic efficiency measured by other methods like carbon metabolism and gas exchange measurements (Genty et al 1989;Walker et al 1983). The fluorescence parameters in photosynthetic organisms change in response to various environmental factors and can be used as sensitive biomarkers in ecotoxicology studies (Conrad et al 1993;Dewez et al 2008;Dorigo and Leboulanger 2001;Ekelund and Aronsson 2007;Gonzáles-Moreno et al 1997;Juneau and Popovic 1999). Photosynthesis and pattern of light harvesting pigments in Euglena were reported to be sensitive to environmental stressors and can be used as biomarkers in evaluating the toxicity of different substances (Ahmed and Häder 2010;Azizullah et al 2010;Gonzáles-Moreno et al 1997;Nass and Ben Shaul 1973).…”

Section: Introductionmentioning

confidence: 98%

Comparative toxicity of the pesticides carbofuran and malathion to the freshwater flagellate Euglena gracilis

Azizullah

Richter

Häder³

2011

Ecotoxicology

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Pesticides are toxic chemicals used for agricultural as well as non-agricultural purposes. The toxicity of pesticides does not remain limited to the site of application but they also cause toxicity to non-target organisms in terrestrial as well as in aquatic environments. This study discusses the comparative toxicity of a carbamate (carbofuran) and an organophosphorus (malathion) pesticide to the freshwater flagellate Euglena gracilis during short- and long-term exposures. To evaluate the toxicity of the pesticides, different parameters of the flagellate, like cell density, motility, swimming velocity, cell shape, gravitactic orientation, photosynthetic efficiency, and concentration of light harvesting pigments, were used as end points. Carbofuran was found to be more toxic to E. gracilis than malathion and adversely affected almost all the tested parameters in short- and long-term experiments. The only significant adverse effect by malathion could be demonstrated on the swimming velocity of cells in short-term experiments. The adverse effects of the pesticides were more pronounced during short-term than during long-term exposure.

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“…Any factor which causes damage to the photosynthetic system of a plant can be recognized through changes in different fluorescence parameters (van Kooten and Snel 1990). Literature survey reveals that fluorescence parameters change in response to various environmental factors and can be used as sensitive biomarkers in ecotoxicology studies (Dorigo and Leboulanger 2001;Dewez et al 2008;Gonzáles-Moreno et al 1997;Ekelund and Aronsson 2007;Conrad et al 1993;Juneau and Popovic 1999).…”

Section: Introductionmentioning

confidence: 98%

Sensitivity of various parameters in Euglena gracilis to short-term exposure to industrial wastewaters

Azizullah

Richter

Häder³

2011

J Appl Phycol

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Due to the presence of various potential pollutants industrial wastewaters pose considerable threats to natural waters and make it unfit for the aquatic biota. Analysis of wastewaters by chemical methods is a common practice; however, it does not reflect the toxic effects on living organism. Therefore, bioassessment is necessary for monitoring of wastewater quality. In the present study, the toxic effects of wastewater samples from different industries were evaluated using Euglena gracilis as a biotest organism. Various parameters of the freshwater flagellate E. gracilis like motility, swimming velocity, cell shape, gravitactic orientation (using the automatic biotest ECOTOX) and photosynthetic efficiency (using a pulse amplitude modulated fluorometer) were used as end points for toxicity assessment. In addition, the samples were analysed for some ecologically important physicochemical properties. With some exceptions, most of the physicochemical properties of the tested samples were within the acceptable range of national environmental quality standards for municipal and industrial effluents. However, all the water samples adversely affected different parameters in E. gracilis. This study led to the conclusion that different toxic substances present in wastewater, even at low concentrations, can be a possible threat to aquatic biota. The results of this study prove that ECOTOX is a sensitive, easy, and fast bioassay for monitoring of water and wastewater quality. Gravitactic orientation and cell compactness of E. gracilis were the most sensitive parameters to wastewater toxicity.

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Validation of photosynthetic-fluorescence parameters as biomarkers for isoproturon toxic effect on alga Scenedesmus obliquus

Cited by 54 publications

References 32 publications

Phytotoxicity, bioaccumulation and degradation of isoproturon in green algae

Phytotoxicity, bioaccumulation and degradation of isoproturon in green algae

Comparative toxicity of the pesticides carbofuran and malathion to the freshwater flagellate Euglena gracilis

Sensitivity of various parameters in Euglena gracilis to short-term exposure to industrial wastewaters

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