Abstract:
An algal toxicity test was conducted to evaluate the toxic effects on a freshwater alga of increasing concentrations of the herbicide paraquat upon growth, chlorophyll and protein content. Paraquat, a widely used herbicide, was found highly toxic to Scenedesmus acutus. Growth pattern, as well as growth rates and generation times exhibited by the cultures exposed up to 0.05 mg Pq/L, was significantly affected. There was a total inhibition growth at 0.8 mg Pq/ L. A stimulatory growth effect was noticed on the cultures exposed to 0.02 mg Pq/L. Statistical analysis revealed that chlorophyll “a” and protein content decreased as the herbicide concentration in the test media was increased. The calculated EC 50 at 96 hs was 0.04 mg Pq/L The NOEC was 0.02 mg Pq/L. Microscopical examination of cells did not show morphological changes. © 1993, Taylor & Francis Group, LLC. All rights reserved.
Registro:
Documento: |
Artículo
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Título: | Toxicity of paraquat to a green alga: Scenedesmus acutus |
Autor: | Sàenz, M.E.; Accorinti, J.; Tortorell, M.D.C. |
Filiación: | Laboratorio de Ecotoxicología, Departamento de Ciencias Básicas, Universidad Nacional de Luján, C.C. 221 6700 Luján (B), Argentina Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas v Naturales, Universidad Nacional de Buenos Aires Ciudad Universitaria, Nuñez 1428 Buenos Aires, Argentina
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Palabras clave: | bioassay; EC 50; inhibition growth; paraquat; protein; Scenedesmus acutus; Inhibition growth; Paraquat; Scenedesmus acutus; Algae; Bioassay; Cells; Chlorophyll; Growth kinetics; Morphology; Pesticide effects; Proteins; Statistical methods; Toxicity; Herbicides; chlorophyll; fresh water; paraquat; protein; alga; article; bioassay; concentration response; growth inhibition; growth rate; nonhuman; protein content; statistical analysis; toxicity testing; algae; Chlorophyta; Scenedesmus acutus |
Año: | 1993
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Volumen: | 28
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Número: | 2
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Página de inicio: | 193
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Página de fin: | 204
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DOI: |
http://dx.doi.org/10.1080/03601239309372822 |
Título revista: | Journal of Environmental Science and Health, Part B
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Título revista abreviado: | J. Environ. Sci. Health Part B Pestic. Food Contamin. Agric. Wastes
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ISSN: | 03601234
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CAS: | chlorophyll, 1406-65-1, 15611-43-5; paraquat, 1910-42-5, 3240-78-6, 4685-14-7; protein, 67254-75-5
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Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03601234_v28_n2_p193_Saenz |
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Citas:
---------- APA ----------
Sàenz, M.E., Accorinti, J. & Tortorell, M.D.C.
(1993)
. Toxicity of paraquat to a green alga: Scenedesmus acutus. Journal of Environmental Science and Health, Part B, 28(2), 193-204.
http://dx.doi.org/10.1080/03601239309372822---------- CHICAGO ----------
Sàenz, M.E., Accorinti, J., Tortorell, M.D.C.
"Toxicity of paraquat to a green alga: Scenedesmus acutus"
. Journal of Environmental Science and Health, Part B 28, no. 2
(1993) : 193-204.
http://dx.doi.org/10.1080/03601239309372822---------- MLA ----------
Sàenz, M.E., Accorinti, J., Tortorell, M.D.C.
"Toxicity of paraquat to a green alga: Scenedesmus acutus"
. Journal of Environmental Science and Health, Part B, vol. 28, no. 2, 1993, pp. 193-204.
http://dx.doi.org/10.1080/03601239309372822---------- VANCOUVER ----------
Sàenz, M.E., Accorinti, J., Tortorell, M.D.C. Toxicity of paraquat to a green alga: Scenedesmus acutus. J. Environ. Sci. Health Part B Pestic. Food Contamin. Agric. Wastes. 1993;28(2):193-204.
http://dx.doi.org/10.1080/03601239309372822