title: Evaluation of mutagenic potential of contaminated atmosphere at Ibirapuera Park, São Paulo - SP, Brazil, using the Tradescantia stamen-hair assay.
abstract: Trad-SHM assay was used to check mutagenic potential of atmospheric contamination at Ibirapuera Park, located in São Paulo city, Brazil, and variation of risk along the year, besides determining which Tradescantia clone, BNL 4430 or KU-20, better indicates risk. Thirty pots of both clones were exposed during one-year period (September, 2002-August, 2003). Twenty inflorescences were taken from each clone twice a month in the morning, in order to estimate the frequency of mutations in stamen hairs. Results were compared to air pollution and climatic data measured next to the exposure site. KU-20 showed stamen-hair mutations greater than BNL 4430. Greatest mutation rates in KU-20 were observed in condition of high monthly mean of NO(2) and average peak concentrations of NO during the day, indicating that mutagenic effects originated from vehicular pollution. Clone KU-20 revealed to be more appropriate for biomonitoring purposes at the Park.
authors.affiliation: Secretaria da Saúde do Município de São Paulo, Supervisão de Saúde de Vila Prudente, Praça Centenário de Vila Prudente, 108, 03132-050 São Paulo, Brazil. maria-izildinha@uol.com.br
authors.forename: Maria Izildinha
authors.initials: MI
authors.lastname: Ferreira
authors.forename: Marisa
authors.initials: M
authors.lastname: Domingos
authors.forename: Heliana de A
authors.initials: Hde A
authors.lastname: Gomes
authors.forename: Paulo H N
authors.initials: PH
authors.lastname: Saldiva
authors.forename: João V
authors.initials: JV
authors.lastname: de Assunção
mesh_terms: D000393:Air Pollutants / Q000032:analysis / Q000633:toxicity*; D001938:Brazil; D002980:Climate; D004784:Environmental Monitoring / Q000379:methods; D035264:Flowers / Q000187:drug effects / Q000235:genetics; D016296:Mutagenesis / Q000187:drug effects*; D009154:Mutation; D009589:Nitrogen Oxides / Q000032:analysis; D012621:Seasons; D034823:Tradescantia / Q000187:drug effects / Q000235:genetics*; D014504:Urban Health; D001335:Vehicle Emissions / Q000032:analysis / Q000633:toxicity*
chemical_list: D000393:Air Pollutants; D009589:Nitrogen Oxides; D001335:Vehicle Emissions