Effectiveness of traffic-related elements in tree bark and pollen abortion rates for assessing air pollution exposure on respiratory mortality rates
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Environment International
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The majority of epidemiological studies correlate the cardiorespiratory effects of air pollution exposure by considering
the concentrations of pollutants measured from conventional monitoring networks. The conventional
air quality monitoring methods are expensive, and their data are insufficient for providing good spatial resolution.
We hypothesized that bioassays using plants could effectively determine pollutant gradients, thus helping
to assess the risks associatedwith air pollution exposure. The study regionswere determined fromdifferent prevalent
respiratory death distributions in the Sao Paulo municipality. Samples of tree flower buds were collected
from twelve sites in four regional districts. The genotoxic effects caused by air pollution were tested through a
pollen abortion bioassay. Elements derived from vehicular traffic that accumulated in tree barks were determined
using energy-dispersive X-ray fluorescence spectrometry (EDXRF). Mortality data were collected from
themortality information program of Sao Paulo City. Principal component analysis (PCA) was applied to the concentrations
of elements accumulated in tree barks. Pearson correlation and exponential regression were performed
considering the elements, pollen abortion rates and mortality data. PCA identified five factors, of which
four represented elements related to vehicular traffic. The elements Al, S, Fe,Mn, Cu, and Zn showed a strong correlationwith
mortality rates (R2 N 0.87) and pollen abortion rates (R2 N 0.82). These results demonstrate that tree
barks and pollen abortion rates allow for correlations between vehicular traffic emissions and associated outcomes
such as genotoxic effects and mortality data.
Como referenciar
CARVALHO-OLIVEIRA, REGIANI; AMATO-LOURENÇO, LUIS; MOREIRA, TIANA C.L.; SILVA, DOUGLAS R.R.; VIEIRA, BRUNA D.; MAUAD, THAIS; SAIKI, MITIKO; SALDIVA, PAULO H.N. Effectiveness of traffic-related elements in tree bark and pollen abortion rates for assessing air pollution exposure on respiratory mortality rates. Environment International, v. 99, p. 161-169, 2017. DOI: 10.1016/j.envint.2016.09.008. Disponível em: http://repositorio.ipen.br/handle/123456789/27376. Acesso em: 26 Mar 2026.
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