Evaluation of the effects of Disperse Red 1 and Disperse Red 13 dyes on the regeneration of Hydra attenuata.

• Grant number: 12/09863-9
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: August 01, 2012
• End date: July 31, 2013
• Field of knowledge: Biological Sciences - Pharmacology - Toxicology
• Principal Investigator: Gisela de Aragão Umbuzeiro
• Grantee: Carina Cristina de Jesus Azevedo
• Host Institution: Faculdade de Tecnologia (FT). Universidade Estadual de Campinas (UNICAMP). Limeira , SP, Brazil
• Associated research grant: 08/10449-7 - Assessment of occurrence, toxicity/genotoxicity and degradation processes of dyes in effluents and surface water, AP.TEM

Abstract

Azo dyes represent 70% of organic dyes produced worldwide. Due to their toxicity, largeindustrial use andlow removal efficiency in conventional treatments, dyesare substancesof great environmental concern.Dyes can be discharged into the environment andcause adverse effects on aquatic organisms. Among the azo dyes, the textile dye Disperse Red 1 and Disperse Red 13 are highly acute toxicwhen compared with other dyesof the same class. These dyes also showed mutagenicity in the Salmonella/microsome assay, so they may be able to interferinthe cell division divisionand delay tregeneration processes. Theobjective of this study is to evaluate the effects ofDisperse Red 1 and Disperse Red 13 on Hydra attenuataregeneration.This freshwater organism is a secondary consumer and is able to regenerate a new body from the gastric regionwithin 72 hours. In this study we expect to obtain more information to complement the toxicity evaluation of these dyes.