Multiple Level Effects of Imazethapyr on Leptodactylus Latinasus (Anura) Adult Frogs

Imazethapyr is an herbicide that is used in a variety of crops worldwide, including soybean and corn. The aim of the present study was to evaluate the biomarkers responses of adult Leptodactylus latinasus exposed to the formulation Pivot® H (10.59% imazethapyr) in the laboratory at concentrations an...

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Autores principales: Pérez Iglesias, Juan Manuel, Zácari Fanali, Lara, Franco Belussi, Lilian, Natale, Guillermo Sebastián, Oliveira, C. de, Brodeur, Julie Céline, Larramendy, Marcelo Luis
Formato: Articulo
Lenguaje:Inglés
Publicado: 2021
Materias:
Ciencias Naturales
biomarkers responses
toxic effect
frogs
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/140394
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-140394
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
biomarkers responses
toxic effect
frogs
spellingShingle Ciencias Naturales
biomarkers responses
toxic effect
frogs
Pérez Iglesias, Juan Manuel
Zácari Fanali, Lara
Franco Belussi, Lilian
Natale, Guillermo Sebastián
Oliveira, C. de
Brodeur, Julie Céline
Larramendy, Marcelo Luis
Multiple Level Effects of Imazethapyr on Leptodactylus Latinasus (Anura) Adult Frogs
topic_facet Ciencias Naturales
biomarkers responses
toxic effect
frogs
description Imazethapyr is an herbicide that is used in a variety of crops worldwide, including soybean and corn. The aim of the present study was to evaluate the biomarkers responses of adult Leptodactylus latinasus exposed to the formulation Pivot® H (10.59% imazethapyr) in the laboratory at concentrations and under conditions that simulate two potential field exposure scenarios: an immersion in field runoff (Scenario 1: 10 mg/L) and a direct exposure to the droplets emitted by spray noozles (Scenario 2: 1000 mg/L). In both scenarios, the experimental procedure involved completely immersing the frogs over a period of 15 s. Different endpoints were evaluated at several ecotoxicological levels 48 and 96 h after the herbicide exposure. These included individual (biometric indices and behavior alterations), histological (liver pigments and lesions), biochemical (catalase, glutathione system and cholinesterase activities) and genotoxic effects (micronuclei induction and nuclear abnormalities). Forty-eight hours after imazethapyr exposure, frogs submitted to Scenario 1 presented an inhibition of liver glutathione-S-transferase activity, whereas histological alterations and increased hepatic cholinesterase levels were observed in frogs exposed under Scenario 2. Ninety-six hours after exposure to the imazethapyr formulation, frogs from the Scenario 1 treatment presented a decrease in liver melanin and hemosiderin, increased hepatic catalase activity and micronuclei induction. For their part, frogs exposed to Scenario 2 presented a decrease in the hepatosomatic index, an increase in liver alterations, melanin reduction and micronuclei induction. The multivariate analysis enables correlations to be made between biomarkers of different organizational level in exposed anurans. Our result indicates that real exposure to imazethapyr formulations under field conditions may pose a risk to Leptodactylus latinasus populations living in the agroecosystems.
format Articulo
Articulo
author Pérez Iglesias, Juan Manuel
Zácari Fanali, Lara
Franco Belussi, Lilian
Natale, Guillermo Sebastián
Oliveira, C. de
Brodeur, Julie Céline
Larramendy, Marcelo Luis
author_facet Pérez Iglesias, Juan Manuel
Zácari Fanali, Lara
Franco Belussi, Lilian
Natale, Guillermo Sebastián
Oliveira, C. de
Brodeur, Julie Céline
Larramendy, Marcelo Luis
author_sort Pérez Iglesias, Juan Manuel
title Multiple Level Effects of Imazethapyr on Leptodactylus Latinasus (Anura) Adult Frogs
title_short Multiple Level Effects of Imazethapyr on Leptodactylus Latinasus (Anura) Adult Frogs
title_full Multiple Level Effects of Imazethapyr on Leptodactylus Latinasus (Anura) Adult Frogs
title_fullStr Multiple Level Effects of Imazethapyr on Leptodactylus Latinasus (Anura) Adult Frogs
title_full_unstemmed Multiple Level Effects of Imazethapyr on Leptodactylus Latinasus (Anura) Adult Frogs
title_sort multiple level effects of imazethapyr on leptodactylus latinasus (anura) adult frogs
publishDate 2021
url http://sedici.unlp.edu.ar/handle/10915/140394
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