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Artículo

Effect of glyphosate on the growth, morphology, ultrastructure and metabolism of Scenedesmus vacuolatus

Iummato, Maria MercedesIcon ; Fassiano, Anabella VictoriaIcon ; Graziano, MartínIcon ; Dos Santos Afonso, María; Rios, Maria del CarmenIcon ; Juárez, Angela Beatriz
Fecha de publicación: 05/2019
Editorial: Elsevier Inc
Revista: Ecotoxicology and Environmental Safety
ISSN: 0147-6513
e-ISSN: 1090-2414
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Otras Ciencias Químicas

Resumen

The effects of a commercial glyphosate formulation on the oxidative stress parameters and morphology (including the ultrastructure) of the phytoplanktonic green microalga Scenedesmus vacuolatus were evaluated. After 96 h of exposure to increasing herbicide concentrations (0, 4, 6, 8 mg L −1 active ingredient) with the addition of alkyl aryl polyglycol ether surfactant, the growth of the cultures decreased (96 h-IC50- 4.90 mg L −1 ) and metabolic and morphology alterations were observed. Significant increases in cellular volume (103–353%) and dry weight (105%) and a significant decrease in pigment content (41–48%) were detected. Oxidative stress parameters were significantly affected, showing an increase in the reactive oxygen species (ROS) and reduced glutathione (GSH) contents, oxidative damage to lipids and proteins and a decrease in the activities of the antioxidant enzymes superoxide dismutase (SOD) and catalase (CAT) and the detoxifying enzyme glutathione-S-transferase (GST). Cells exposed to glyphosate formulation were larger and showed an increase in vacuole size, bleaching, cell wall thickening and alteration of the stacking pattern of thylakoids. The results of this study showed the participation of oxidative stress in the mechanism of toxic action of the commercial glyphosate formulation on S. vacuolatus and the relation between the biochemical, morphological and ultrastructure alterations.
Palabras clave: BIOMARKERS , GLYPHOSATE , MICROALGAE , OXIDATIVE STRESS , SCENEDESMUS VACUOLATUS , ULTRASTRUCTURE
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Atribución-NoComercial-SinDerivadas 2.5 Argentina (CC BY-NC-ND 2.5 AR)
Identificadores
URI: http://hdl.handle.net/11336/122106
URL: https://www.sciencedirect.com/science/article/pii/S0147651319301101
DOI: https://doi.org/10.1016/j.ecoenv.2019.01.083
Colecciones
Articulos(IBBEA)
Articulos de INSTITUTO DE BIODIVERSIDAD Y BIOLOGIA EXPERIMENTAL Y APLICADA
Articulos(INIBIOMA)
Articulos de INST. DE INVEST.EN BIODIVERSIDAD Y MEDIOAMBIENTE
Articulos(INQUIMAE)
Articulos de INST.D/QUIM FIS D/L MATERIALES MEDIOAMB Y ENERGIA
Articulos(IQUIBICEN)
Articulos de INSTITUTO DE QUIMICA BIOLOGICA DE LA FACULTAD DE CS. EXACTAS Y NATURALES
Citación
Iummato, Maria Mercedes; Fassiano, Anabella Victoria; Graziano, Martín; Dos Santos Afonso, María; Rios, Maria del Carmen; et al.; Effect of glyphosate on the growth, morphology, ultrastructure and metabolism of Scenedesmus vacuolatus; Elsevier Inc; Ecotoxicology and Environmental Safety; 172; 5-2019; 471-479
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