Biomonitoring genotoxic risks under the urban weather conditions and polluted atmosphere in Santo André, SP, Brazil, through Trad-MCN bioassay

The present study was made to check if the Trad-MCN bioassay, developed with inflorescences of Tradescantia pallida cv. Purpurea, might discriminate genotoxic risks in areas of the city of Santo André (SE Brazil) contaminated by different air pollutants, and periods of the year when risks are higher...

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Bibliographic Details
Published in:Ecotoxicology and environmental safety 2009-01, Vol.72 (1), p.255-260
Main Authors: Savóia, Eriane Justo Luiz, Domingos, Marisa, Guimarães, Eliane Tigre, Brumati, Fabiano, Saldiva, Paulo Hilário Nascimento
Format: Article
Language:English
Subjects:
Biological Assay - methods
Biomonitoring
Brazil
Environmental Monitoring - methods
Environmental Pollution
Flowers - drug effects
Genotoxic risks
Humans
Humidity
Mutagens - toxicity
Risk Assessment
Temperature
Trad-MCN bioassay
Tradescantia
Tradescantia - drug effects
Tradescantia - growth & development
Urban Population
Vehicle Emissions - toxicity
Vehicular and industrial emissions
Weather
Weather factors
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Summary:The present study was made to check if the Trad-MCN bioassay, developed with inflorescences of Tradescantia pallida cv. Purpurea, might discriminate genotoxic risks in areas of the city of Santo André (SE Brazil) contaminated by different air pollutants, and periods of the year when risks are higher, and to determine if the variations in the frequency of micronuclei (MCN) can be explained by environmental factors that characterize the stressful situation in each site. Potted plants were exposed in sites highly contaminated by ozone (Capuava and School) and in sites reached by high vehicular emissions (downtown and Celso Daniel Park). Pedroso Park, far from the polluted areas, was taken as reference. From September 2003 to September 2004, 20 young inflorescences were collected twice a week from each place and the frequencies of MCN were estimated. The environmental conditions observed in the polluted sites were stressful enough to promote an increase of MCN, mainly in sites reached by high vehicular emissions. But MCN rates in Capuava and at Celso Daniel Park could not be predicted only by pollutants which characterized the air contamination in these sites. More severe weather conditions, mainly low temperature, relative humidity and rainfall, caused an increase of MCN. Improvement of the biomonitoring system is recommended to minimize this negative influence of weather factors.
ISSN:0147-6513
1090-2414
DOI:10.1016/j.ecoenv.2008.03.019