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Manual harvesting is usually done after to sugar cane burning which is responsible for seasonal emission of air pollutants in Brazil and it is believed to be responsible for deleterious health effects in exposed populations. The mutagenic potential of sugar cane burning harvesting particulate and particle surrogates of residual oil fly ash (ROFA) were evaluated in assays measuring micronuclei (MN) in the pollen mother cells of Tradescantia pallida (TRAD-MN). Micronuclei frequencies in TRAD-MN to sugar cane burning residues (SCBR) at doses 0.3 and 0.03 mg/mL were respectively 2.18 ± 0.35 and 5.53 ± 1.04, whereas to ROFA from incinerator and ROFA from an electrostatic precipitator installed in one of the chimneys of a steel plant, MN frequencies were, respectively, 3.43 ± 0.7 and 4.90 ± 1.07. Significant differences were detected among the groups (p < 0.001), demonstrating that SCBR was at least as genotoxic as the fossil fuel derived particles. The results suggest that the burning process to harvest sugar cane should be better controlled. Keywords: pollution, burning particles, micronuclei, Tradescantia pallida . Particulas derivadas da queima de biomassa induzem alta frequencia de micronucleos no ensaio de Tradescantia pallida (TRAD-MN) Resumo A coleta de cana-de-acucar manual e geralmente realizada apos a queima, a qual e responsavel pela emissao sazonal de poluentes atmosfericos no Brasil e acredita-se que este seja responsavel pelos efeitos deleterios a saude da populacao exposta. O potencial mutagenico da queima de cana-de-acucar e particulas oriundas de residuos em cinza de oleo queimado (ROFA) foi avaliado em ensaio que mede a frequencia de micronucleos (MN) em celulas mae de grao de polen de Tradescantia pallida (TRAD-MN). A frequencia de TRAD-MN em residuos de queima de cana de acucar (SCBR) nas doses de 0.3 e 0,03mg/mL foi, respectivamente de 2,18 ± 0,35 e 5,53 ± 1,04, enquanto para ROFA de incinerador e ROFA de um precipitador eletrostatico instalado em uma chamine de uma industria siderurgica, a frequencia de MN foi, respectivamente, 3,43 ± 0,7 e 4,90 ± 1,07. Diferenca significante foi observada entre os grupos (p<0,001), demonstrando que SCBR foi ao menos tao genotoxico quanto as particulas derivadas de combustiveis fosseis. Os resultados sugerem que o processo de queima de cana-de-acucar no periodo da safra deveria ser mais bem controlado. Palavras-Chave: poluicao, particulas de queimadas, micronucleos, Tradescantia pallida.

journal of the brazilian society of ecotoxicology

Micronucleus formation induced by biomass burning particles derived from biomass burning induce high micronucleus frequency in Tradescantia pallida assay (TRAD-MN)