Document Detail

Oxyfluorfen toxic effect on S. obliquus evaluated by different photosynthetic and enzymatic biomarkers.
MedLine Citation:
PMID:  14708660     Owner:  NLM     Status:  MEDLINE    
The effect of oxyfluorfen was investigated when alga Scenedesmus obliquus has been exposed to different concentrations (7.5, 15, and 22.5 microg x L(-1)) at 12, 24, and 48 hours of exposure. Toxicity test was done by using 13 biomarkers concerning growth rate, chlorophyll content and indicators of photosynthetic and antioxidant enzyme activities. The change of the 13 parameters showed a great variation of sensitivity indicating differences in parameters' suitability to be used as biomarkers when alga culture was exposed to oxyfluorfen toxicity. The order of sensitivity between those biomarkers was: Antenna size (ABS/RC) > Chlorophyll content > Catalase (CAT) > Operational PSII quantum yield (phiS(PSII)) > Glutathione S-transferase (GST) > Functional plastoquinone pool (Q(PQ)) > Glutathione reductase (GR) > Growth rate > Nonphotochemical quenching (QN) > Proton gradient quenching (Q(Emax)) > Ascorbate peroxidase (APX) > Photochemical quenching (Q(p)) > Maximum PSII quantum yield (Phi(PSII)). The effect of oxyfluorfen on the changes of those parameters was interpreted as a result of herbicide mode of action at molecular level of alga cellular system. This study indicated for some photosynthetic and enzymatic biomarkers to be useful indicators of toxicity effect induced in non-target alga species. Determination of biomarkers' sensitivity order may facilitate their selection to be used in environmental risk assessment of polluted water.
L Geoffroy; D Dewez; G Vernet; R Popovic
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Archives of environmental contamination and toxicology     Volume:  45     ISSN:  0090-4341     ISO Abbreviation:  Arch. Environ. Contam. Toxicol.     Publication Date:  2003 Nov 
Date Detail:
Created Date:  2004-01-07     Completed Date:  2004-01-20     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0357245     Medline TA:  Arch Environ Contam Toxicol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  445-52     Citation Subset:  IM    
Laboratoire d'Eco-Toxicologie, Unité de Recherche "Vignes et Vins de Champagne," UPRES-EA 2069, Université de Reims Champagne-Ardenne, BP 1039, F51687 Reims 2, France.
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MeSH Terms
Biological Markers / analysis*
Chlorophyll / analysis
Glutathione Reductase / analysis
Glutathione Transferase / analysis
Halogenated Diphenyl Ethers
Phenyl Ethers / toxicity*
Photosynthesis / physiology*
Scenedesmus / enzymology*,  growth & development
Water Pollutants, Chemical / toxicity*
Reg. No./Substance:
0/Biological Markers; 0/Halogenated Diphenyl Ethers; 0/Phenyl Ethers; 0/Water Pollutants, Chemical; 1406-65-1/Chlorophyll; 42874-03-3/oxyfluorofen; EC Reductase; EC Transferase

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