Herbicide Mixtures from Usual Practice in Sugarcane Crop: Evaluation of Oxidative Stress and Histopathological Effects in the Tropical Fish Oreochromis niloticus

Sugarcane is one of the world’s most important commodities. In order to control weeds in the plantations and increase productivity, the mixing of different herbicides during spraying operations is commonplace. This practice is unregulated, and the impact on water quality and nontarget tropical speci...

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Veröffentlicht in:Water, air, and soil pollution air, and soil pollution, 2017-09, Vol.228 (9), p.1, Article 332
Hauptverfasser: Jonsson, Claudio Martin, Arana, Sarah, Ferracini, Vera Lucia, Queiroz, Sonia Claudia Nascimento, Clemente, Zaira, Vallim, José Henrique, de Holanda Nunes Maia, Aline, de Moura, Mônica Accaui Marcondes
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container_issue 9
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container_title Water, air, and soil pollution
container_volume 228
creator Jonsson, Claudio Martin
Arana, Sarah
Ferracini, Vera Lucia
Queiroz, Sonia Claudia Nascimento
Clemente, Zaira
Vallim, José Henrique
de Holanda Nunes Maia, Aline
de Moura, Mônica Accaui Marcondes
description Sugarcane is one of the world’s most important commodities. In order to control weeds in the plantations and increase productivity, the mixing of different herbicides during spraying operations is commonplace. This practice is unregulated, and the impact on water quality and nontarget tropical species is poorly understood. In the present work, exposure and recovery assays were used to evaluate antioxidant enzyme activity and histopathological alterations in the liver of tilapia ( Oreochromis niloticus ) following exposure to mixtures of the herbicides widely used in sugarcane crops: ametryn (AMT), tebuthiuron (TBUT), diuron (DIU), and hexazinone (HZN). The greatest biochemical changes were observed for the mixture (DIU+HZN)+AMT+TBUT at the highest concentration tested (1/10 96hLC50). This mixture caused a significant increase ( p  
doi_str_mv 10.1007/s11270-017-3506-2
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In order to control weeds in the plantations and increase productivity, the mixing of different herbicides during spraying operations is commonplace. This practice is unregulated, and the impact on water quality and nontarget tropical species is poorly understood. In the present work, exposure and recovery assays were used to evaluate antioxidant enzyme activity and histopathological alterations in the liver of tilapia ( Oreochromis niloticus ) following exposure to mixtures of the herbicides widely used in sugarcane crops: ametryn (AMT), tebuthiuron (TBUT), diuron (DIU), and hexazinone (HZN). The greatest biochemical changes were observed for the mixture (DIU+HZN)+AMT+TBUT at the highest concentration tested (1/10 96hLC50). This mixture caused a significant increase ( p  &lt; 0.01) of approximately 82% in GST activity after 14 days of exposure. For three of the mixtures evaluated, GST and CAT could be considered potential biochemical biomarkers of exposure to the herbicide mixtures due to the frequency, intensity, and statistical significance of alterations in the assimilation phase. Although morphological changes were evident in the hepatic tissue, severe damage was only noted in a few samples, and there were no statistically significant differences, relative to the control. The results of hepatic lesion recovery assays suggested that the most sensitive individuals affected by the xenobiotics were unable to achieve full recovery. 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subjects Agrochemicals
Analysis
Antioxidants (Nutrients)
Atmospheric Protection/Air Quality Control/Air Pollution
Biomarkers
Chemical contamination
Climate Change/Climate Change Impacts
Commodities
Data recovery
Diuron
Earth and Environmental Science
Environment
Environmental monitoring
Enzymatic activity
Enzyme activity
Exposure
Fish
Fishes
Freshwater fishes
Herbicides
Hexazinone
Histopathology
Hydrogeology
Liver
Marine fishes
Oreochromis niloticus
Oxidative stress
Phase transitions
Plantations
Soil Science & Conservation
Spraying
Statistical analysis
Statistical methods
Statistical significance
Sugarcane
Tilapia
Tropical fish
Water quality
Water Quality/Water Pollution
Weeds
Xenobiotics
title Herbicide Mixtures from Usual Practice in Sugarcane Crop: Evaluation of Oxidative Stress and Histopathological Effects in the Tropical Fish Oreochromis niloticus
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