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Toxicity assessment of the herbicides sulcotrione and mesotrione toward two reference environmental microorganisms: Tetrahymena pyriformis and Vibrio fischeri
- Source :
- Archives of Environmental Contamination and Toxicology, Archives of Environmental Contamination and Toxicology, Springer Verlag, 2008, 55 (4), pp.576-83. ⟨10.1007/s00244-008-9145-2⟩, Archives of Environmental Contamination and Toxicology, 2008, 55 (4), pp.576-83. ⟨10.1007/s00244-008-9145-2⟩
- Publication Year :
- 2008
- Publisher :
- HAL CCSD, 2008.
-
Abstract
- International audience; The potential toxicity of sulcotrione (2-[2-chloro-4-(methylsulfonyl)benzoyl]-1,3-cyclohexanedione) and mesotrione (2-[4-(methylsulfonyl)-2-nitrobenzoyl]-1,3-cyclohexanedione), two selective triketonic herbicides, was assessed using representative environmental microorganisms frequently used in ecotoxicology: the eukaryote Tetrahymena pyriformis and the prokaryote Vibrio fischeri. The aims were also to evaluate the toxicity of different known degradation products, to compare the toxicity of these herbicides with that of atrazine, and to assess the toxicity of the commercial herbicidal products Mikado and Callisto. Toxicity assays involved the Microtox test, the T. pyriformis population growth impairment test, and the T. pyriformis nonspecific esterase activity test. For each compound, we report original data (IC(50) values) on nontarget cells frequently used in ecotoxicology. Analytical standards sulcotrione and mesotrione showed no toxic effect on T. pyriformis population growth but a toxic influence was observed on nonspecific esterase activities of this microorganism and on metabolism of V. fischeri. Most of the degradation products studied and the two commercial formulations showed a greater toxicity than the parent molecules. Compared with the effect of atrazine, the toxicity of these triketonic herbicides was less than in T. pyriformis and greater than or the same as in V. fischeri. Additional work is needed to obtain a more accurate picture of the environmental impact of these herbicides. It will be necessary in future experiments to study the ecosystemic levels (aquatic and soil compartments) and to assess the potential toxicity of the newly discovered degradation products and of the additives accompanying the active ingredient in the commercial herbicidal formulations.
- Subjects :
- Health, Toxicology and Mutagenesis
Microorganism
010501 environmental sciences
Toxicology
Ecotoxicology
01 natural sciences
MESH: Vibrio fischeri
Mesotrione
Carboxylesterase
chemistry.chemical_compound
Triketone
Aliivibrio fischeri
MESH: Animals
Atrazine
MESH: Carboxylesterase
MESH: Inhibitory Concentration 50
Mesylates
0303 health sciences
Ciliata
biology
Tetrahymena pyriformis
General Medicine
Pollution
Biochemistry
Toxicity
Herbicide
[SDV.TOX.ECO]Life Sciences [q-bio]/Toxicology/Ecotoxicology
MESH: Environmental Monitoring
Environmental Monitoring
Vibrionaceae
MESH: Atrazine
Vibrio fischeri
MESH: Mesylates
Environment
MESH: Tetrahymena pyriformis
Microbiology
03 medical and health sciences
Inhibitory Concentration 50
Animals
Protozoa
Pesticides
030304 developmental biology
0105 earth and related environmental sciences
MESH: Herbicides
Bacteria
Cyclohexanones
Herbicides
Pesticide
biology.organism_classification
chemistry
13. Climate action
MESH: Cyclohexanones
Subjects
Details
- Language :
- English
- ISSN :
- 00904341 and 14320703
- Database :
- OpenAIRE
- Journal :
- Archives of Environmental Contamination and Toxicology, Archives of Environmental Contamination and Toxicology, Springer Verlag, 2008, 55 (4), pp.576-83. ⟨10.1007/s00244-008-9145-2⟩, Archives of Environmental Contamination and Toxicology, 2008, 55 (4), pp.576-83. ⟨10.1007/s00244-008-9145-2⟩
- Accession number :
- edsair.doi.dedup.....e46bc5ccef5155311bcf56de0052e8d8