Toxicity of paraquat to a green alga: Scenedesmus acutus

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 gro...

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Publicado:	1993
Materias:	bioassay EC 50 inhibition growth paraquat protein Scenedesmus acutus Inhibition growth Paraquat Algae Bioassay Cells Chlorophyll Growth kinetics Morphology Pesticide effects Proteins Statistical methods Toxicity Herbicides chlorophyll fresh water alga article concentration response growth inhibition growth rate nonhuman protein content statistical analysis toxicity testing algae Chlorophyta
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03601234_v28_n2_p193_Saenz http://hdl.handle.net/20.500.12110/paper_03601234_v28_n2_p193_Saenz
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_03601234_v28_n2_p193_Saenz
record_format	dspace
spelling	paper:paper_03601234_v28_n2_p193_Saenz2023-06-08T15:34:35Z Toxicity of paraquat to a green alga: Scenedesmus acutus 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 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. 1993 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03601234_v28_n2_p193_Saenz http://hdl.handle.net/20.500.12110/paper_03601234_v28_n2_p193_Saenz
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	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
spellingShingle	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 Toxicity of paraquat to a green alga: Scenedesmus acutus
topic_facet	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
description	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.
title	Toxicity of paraquat to a green alga: Scenedesmus acutus
title_short	Toxicity of paraquat to a green alga: Scenedesmus acutus
title_full	Toxicity of paraquat to a green alga: Scenedesmus acutus
title_fullStr	Toxicity of paraquat to a green alga: Scenedesmus acutus
title_full_unstemmed	Toxicity of paraquat to a green alga: Scenedesmus acutus
title_sort	toxicity of paraquat to a green alga: scenedesmus acutus
publishDate	1993
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03601234_v28_n2_p193_Saenz http://hdl.handle.net/20.500.12110/paper_03601234_v28_n2_p193_Saenz
_version_	1768546211295395840

Toxicity of paraquat to a green alga: Scenedesmus acutus

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