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Validation of photosynthetic-fluorescence parameters as biomarkers for isoproturon toxic effect on alga Scenedesmus obliquus.
Environ Pollut. 2008 Jan; 151(1):93-100.EP

Abstract

Photosynthetic-fluorescence parameters were investigated to be used as valid biomarkers of toxicity when alga Scenedesmus obliquus was exposed to isoproturon [3-(4-isopropylphenyl)-1,1-dimethylurea] effect. Chlorophyll fluorescence induction of algal cells treated with isoproturon showed inactivation of photosystem II (PSII) reaction centers and strong inhibition of PSII electron transport. A linear correlation was found (R2>or=0.861) between the change of cells density affected by isoproturon and the change of effective PSII quantum yield (PhiM'), photochemical quenching (qP) and relative photochemical quenching (qP(rel)) values. The cells density was also linearly dependent (R2=0.838) on the relative unquenched fluorescence parameter (UQF(rel)). Non-linear correlation was found (R2=0.937) only between cells density and the energy transfer efficiency from absorbed light to PSII reaction center (ABS/RC). The order of sensitivity determined by the EC-50% was: UQF(rel)>PhiM'>qP>qP(rel)>ABS/RC. Correlations between cells density and those photosynthetic-fluorescence parameters provide supporting evidence to use them as biomarkers of toxicity for environmental pollutants.

Authors+Show Affiliations

University of Quebec in Montreal, Department of Chemistry, Environmental Toxicology Research Center--TOXEN, 2101, Jeanne-Mance, Montreal, Quebec H2X 2J6, Canada.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't
Validation Study

Language

eng

PubMed ID

17467127

Citation

Dewez, David, et al. "Validation of Photosynthetic-fluorescence Parameters as Biomarkers for Isoproturon Toxic Effect On Alga Scenedesmus Obliquus." Environmental Pollution (Barking, Essex : 1987), vol. 151, no. 1, 2008, pp. 93-100.
Dewez D, Didur O, Vincent-Héroux J, et al. Validation of photosynthetic-fluorescence parameters as biomarkers for isoproturon toxic effect on alga Scenedesmus obliquus. Environ Pollut. 2008;151(1):93-100.
Dewez, D., Didur, O., Vincent-Héroux, J., & Popovic, R. (2008). Validation of photosynthetic-fluorescence parameters as biomarkers for isoproturon toxic effect on alga Scenedesmus obliquus. Environmental Pollution (Barking, Essex : 1987), 151(1), 93-100.
Dewez D, et al. Validation of Photosynthetic-fluorescence Parameters as Biomarkers for Isoproturon Toxic Effect On Alga Scenedesmus Obliquus. Environ Pollut. 2008;151(1):93-100. PubMed PMID: 17467127.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Validation of photosynthetic-fluorescence parameters as biomarkers for isoproturon toxic effect on alga Scenedesmus obliquus. AU - Dewez,David, AU - Didur,Olivier, AU - Vincent-Héroux,Jonathan, AU - Popovic,Radovan, Y1 - 2007/04/30/ PY - 2006/09/11/received PY - 2006/12/14/revised PY - 2007/03/11/accepted PY - 2007/5/1/pubmed PY - 2008/5/20/medline PY - 2007/5/1/entrez SP - 93 EP - 100 JF - Environmental pollution (Barking, Essex : 1987) JO - Environ Pollut VL - 151 IS - 1 N2 - Photosynthetic-fluorescence parameters were investigated to be used as valid biomarkers of toxicity when alga Scenedesmus obliquus was exposed to isoproturon [3-(4-isopropylphenyl)-1,1-dimethylurea] effect. Chlorophyll fluorescence induction of algal cells treated with isoproturon showed inactivation of photosystem II (PSII) reaction centers and strong inhibition of PSII electron transport. A linear correlation was found (R2>or=0.861) between the change of cells density affected by isoproturon and the change of effective PSII quantum yield (PhiM'), photochemical quenching (qP) and relative photochemical quenching (qP(rel)) values. The cells density was also linearly dependent (R2=0.838) on the relative unquenched fluorescence parameter (UQF(rel)). Non-linear correlation was found (R2=0.937) only between cells density and the energy transfer efficiency from absorbed light to PSII reaction center (ABS/RC). The order of sensitivity determined by the EC-50% was: UQF(rel)>PhiM'>qP>qP(rel)>ABS/RC. Correlations between cells density and those photosynthetic-fluorescence parameters provide supporting evidence to use them as biomarkers of toxicity for environmental pollutants. SN - 0269-7491 UR - https://www.unboundmedicine.com/medline/citation/17467127/Validation_of_photosynthetic_fluorescence_parameters_as_biomarkers_for_isoproturon_toxic_effect_on_alga_Scenedesmus_obliquus_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0269-7491(07)00128-5 DB - PRIME DP - Unbound Medicine ER -