Evaluation of genetic and biochemical biomarkers in Nile tilapia (Oreochromis niloticus) exposed to herbicides Combine (tebutiurom) and Velpar (diurom + hexaninona)

• Grant number: 10/04028-9
• Support Opportunities: Scholarships in Brazil - Master
• Start date: August 01, 2010
• End date: January 31, 2012
• Field of knowledge: Biological Sciences - Biochemistry - Metabolism and Bioenergetics
• Principal Investigator: Eduardo Alves de Almeida
• Grantee: Mariana Furio Franco Bernardes
• Host Institution: Instituto de Biociências, Letras e Ciências Exatas (IBILCE). Universidade Estadual Paulista (UNESP). Campus de São José do Rio Preto. São José do Rio Preto , SP, Brazil

Abstract

The aquatic environment is invariably struck by xenobiotics (chemical of natural or man-made). Herbicides are a heterogeneous category of chemicals, made specifically for weed control, which can reach aquatic ecosystems. These xenobiotics can be grouped according to the mechanism of action, including inhibitors of photosystem II of photosynthesis. Among these are the possessors of chemical groups triazines (herbicide atrazine), triazinones (herbicide hexazinone) and urea (herbicides diurom and tebutiurom). Biomarkers can be defined as a body changes that are indicative of exposure or effect of a xenobiotic. Several cellular components in fish have been used as biomarkers, including the analysis of the genetic and biochemical parameters. In order to analyze the genotoxic, mutagenic and metabolic herbicide Combine ® (tebutiurom) and Velpar ® (diurom + hexazinone) in Nile tilapia (Oreochromis niloticus) are examined, as genetic biomarkers, the frequency of micronuclei and nuclear abnormalities in addition to the comet assay. As biochemical biomarkers will be analyzed the levels of the activities of biotransformation enzymes 7-etóxiresorufina-O-desetilase (EROD) and glutathione S-transferases (GST), the antioxidant enzyme superoxide dismutase (SOD) and lipid peroxidation (LPO).

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

BERNARDES, Mariana Furio Franco. Avaliação de biomarcadores de contaminação em tilápias do nilo (oreochromis niloticus) expostas aos herbicidas combine *500sc (tebutiurom) e velpar k® wg (diurom + hexazinona). 2012. Master's Dissertation - Universidade Estadual Paulista (Unesp). Instituto de Biociências Letras e Ciências Exatas. São José do Rio Preto São José do Rio Preto.