Active Versus Passive Biomonitoring of Air Quality: Genetic Damage and Bioaccumulation of Trace Elements in Flower Buds of Tradescantia pallida var. purpurea

• Published in: Water, air, and soil pollution air, and soil pollution, 2016-07, Vol.227 (7), p.1, Article 229
• Main Authors: da Costa, Gustavo Marques, Petry, Camila Tamires, Droste, Annette
• Format: Article
• Language: English
• Subjects: Air pollution; Air quality; Altitude; Atmospheric Protection/Air Quality Control/Air Pollution; Bioaccumulation; Biological monitoring; Biomonitoring; Buds; Chromosome aberrations; Climate Change/Climate Change Impacts; Coal-fired power plants; Earth and Environmental Science; Environment; Environmental factors; Environmental monitoring; Flowers; Genotoxicity; Humidity; Hydrogeology; Industrial plant emissions; Metallurgy; Metropolitan areas; Multivariate analysis; Municipalities; Nitrogen dioxide; Outdoor air quality; Pollutants; Rain; Soil Science & Conservation; Trace elements; Tradescantia pallida; Traffic; Traffic congestion; Vehicles; Water Quality/Water Pollution; Weather
• ISSN: 0049-6979; 1573-2932
• DOI: 10.1007/s11270-016-2923-y

This study aimed to assess the micronuclei formation in Tradescantia pallida var. purpurea through active and passive biomonitoring of air genotoxicity and its relation with abiotic environmental factors, and to analyze the concentrations of trace elements in flower buds and leaves, in order to determine the importance of these parameters to atmospheric quality monitoring. For 2 years, active biomonitoring was conducted with exposure of cuttings with flower buds at three sites in the metropolitan area of Porto Alegre in southern Brazil, and indoor (negative control). For passive biomonitoring, flower buds were collected from beds at the same sites. Meteorological and vehicular traffic data were recorded during the exposures. The micronuclei (MCN) frequencies obtained by active and passive biomonitoring for Canoas, Esteio, and São Leopoldo (respectively means of 5.44, 5.34, 4.17 and of 3.01, 2.47, 2.72) were significantly higher than those of the negative control. Furthermore, the sensitivity of the flower buds used for active biomonitoring was greater compared to those used for the passive biomonitoring, which was evidenced by significantly higher MCN frequencies. The multivariate analysis indicated two main components responsible for 74.58 % of the variances observed, and pointed to a strong relation between micronuclei frequency from active biomonitoring and vehicular traffic. Temperature and relative air humidity did not relate with the formation of micronuclei in both biomonitoring systems. Flower buds proved to be efficient bioaccumulators of trace elements, as they accumulated concentrations of up to three times more than the leaves.