Genotoxicity on Tradescantia pallida var. purpurea plants exposed to urban and rural environments in the metropolitan area of Porto Alegre, southern Brazil

Gm, Costa; Droste, Annette

doi:10.1590/s1519-69842012000500004

Cited by 19 publications

(14 citation statements)

References 22 publications

(38 reference statements)

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“…purpurea plants exposed in urban environments corroborate data reported by Costa and Droste (2012), who observed MCN frequencies from 3.26 to 8.13 in Estância Velha, a municipality with leader and footwear industrial activity in the lower section of the Sinos River Basin. Savóia et al (2009) (Carreras et al, 2013).…”

Section: Discussionsupporting

confidence: 88%

“…var. purpurea Boom presents high sensitivity to genotoxic agents and has been used in biomonitoring of atmospheric air quality in urban environments with different intensities of vehicular traffic, in industrial areas, and in rural environments with preserved vegetation (Meireles et al, 2009;Costa and Droste, 2012;Pereira et al, 2013). The influence of the combination of climatic factors with atmospheric pollutants on the response of T. pallida var.…”

Section: Introductionmentioning

confidence: 99%

“…Increasing urbanization and industrialization especially of municipalities that are part of the Porto Alegre metropolitan area has caused degradation and fragmentation of forests, to the extent that only a forestry mosaic interspersed with urban areas remains (Teixeira et al, 1986;Figueiredo et al, 2010). Therefore, the forest remnants that are left in the basin are vulnerable to atmospheric pollutants mainly released by industry and intense vehicle traffic (Costa and Droste, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Biomonitoring the genotoxic potential of the air on Tradescantia pallida var. purpurea under climatic conditions in the Sinos River basin, Rio Grande do Sul, Brazil

et al. 2015

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The present study evaluated the genotoxic effects of the atmospheric air on Tradescantia pallida var. purpurea in urban areas with different intensities of vehicular traffic and in riparian forest fragments in the Sinos River Basin (Rio Grande do Sul, Brazil), considering the influence of climatic conditions prevailing in these environments. Bimonthly, from May 2012 to March 2013, cuttings with flower buds were exposed for 8 h in urban and riparian forest environments in the municipalities of Caraá, Taquara and Campo Bom in the upper, middle and lower sections, respectively, of the Sinos River Basin. Simultaneously, negative controls were made and climatic data were recorded. Micronuclei (MCN) frequencies were determined in young tetrads of pollen mother cells and expressed as MCN/100 tetrads. Significantly higher MCN frequencies were observed in buds exposed in urban and riparian forest environments in Taquara (up to 7.23 and 4.80, respectively) and Campo Bom (up to 4.90 and 4.23, respectively) than in buds exposed in Caraá (up to 2.90 and 2.50, respectively), in the majority of samplings, and in relation to the negative control (up to 1.93) in all months. Over the course of the period monitored, there were significant variations in MCN frequencies at all sampling points, with the exception of the urban environment in Caraá. For the urban environments, relation between the MCN frequency, vehicular traffic and mean temperature was observed. For the riparian forest fragments, there was no association between MCN frequency and climatic factors. Tradescantia pallida var. purpurea can be considered a useful tool to point out areas with increased atmospheric pollution, since the exposure of plants under severe climatic conditions is avoided to minimize their negative influence on the formation of micronuclei.Keywords: abiotic factors, vehicular emissions, bioindicator, environmental quality, micronucleus. Biomonitoramento do potencial genotóxico do ar em

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Section: Discussionsupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Biomonitoring the genotoxic potential of the air on Tradescantia pallida var. purpurea under climatic conditions in the Sinos River basin, Rio Grande do Sul, Brazil

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“…However, in these locations, there is still generation and treatment of leachate, which is ultimately released in the water resources. The water quality in the basin is influenced by the direct discharge of domestic and industrial sewage, which have the potential to cause toxic effects on genetic and cellular levels (Blume et al, 2010;Scalon et al, 2010;Rechenmacher et al, 2010;Costa and Droste, 2012). Although the release of leachate poses an environmental risk, the effectiveness of its treatment and its toxicity in the Sinos River Basin were not assessed.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of phytotoxicity of municipal landfill leachate before and after biological treatment

2015

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In the present study, leachate toxicity of a municipal solid waste landfill located in the Sinos River Valley region (southern Brazil) was evaluated using plant bioassays. Leachate toxicity was assessed by analysis of seed germination and root elongation of lettuce (Lactuca sativa L.) and rocket plant (Eruca sativa Mill.) and root elongation of onions (Allium cepa L.). Bioassays were performed by exposing the seeds of L. sativa and E. sativa and the roots of A. cepa to raw leachate, treated leachate (biological treatment) and negative control (tap water). The levels of metals detected in both samples of leachate were low, and raw leachate showed high values for ammoniacal nitrogen and total Kjeldahl nitrogen. There is a reduction in the values of several physicochemical parameters, which demonstrates the efficiency of the treatment. Both L. sativa and A. cepa showed a phytotoxic response to landfill leachate, showing reduced root elongation. However, the responses of these two plant species were different. Root elongation was significantly lower in A. cepa exposed to treated leachate, when compared to negative control, but did not show any difference when compared to raw leachate. In L. sativa, seeds exposed to the raw leachate showed significant reduction in root elongation, when compared to treated leachate and negative control. Seed germination showed no difference across the treatments. The results of the study show that plant species respond differently and that municipal solid waste landfill leachate show phytotoxicity, even after biological treatment. Palavras-chave: bioensaios com plantas, poluição da água, tratamento de efluentes, efeitos tóxicos. Keywords

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“…Monthly, 100 mL of an N-P-K fertilizer solution (10-10-10, w/w/w) was applied. Plant exposure, inflorescence fixation and storage, slide preparation and data analysis followed the protocol described by Costa and Droste (2012). Cuttings collected from the plant stocks bearing young inflorescences were divided into groups of 15 to 20 and exposed to water samples from each sampling site for 24 h. Every three months, a negative control was prepared using the same method, but replacing stream water with distilled water.…”

Section: Trad-mcn Bioassaymentioning

confidence: 99%

Biomonitoring of water genotoxicity in a Conservation Unit in the Sinos River Basin, Southern Brazil, using the <italic>Tradescantia</italic>micronucleus bioassay

et al. 2015

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The Tradescantia micronucleus (Trad-MCN) bioassay was used to investigate genotoxicity of water bodies in the Parque Municipal Henrique Luís Roessler (PMHLR), a conservation unit in the city of Novo Hamburgo, Southern Brazil, from November 2010 to October 2011. Every month, cuttings with young inflorescences of Tradescantia pallida var. purpurea were exposed for 24 hours to water collected at three sites in the park: (S1) head of the main stream; (S2) head of a secondary stream; (S3) a point past the junction of the two water bodies in which S1 and S2 were located. As a negative control, cuttings were exposed to distilled water for 24 h every quarter. Micronuclei (MCN) frequency was determined in young tetrads of pollen mother cells and described as MCN/100 tetrads. Rainfall data were also recorded. In nine months at S1 and S2, and in eleven months at S3, micronuclei frequencies were significantly higher than in quarterly controls, in which frequencies varied from 1.19 to 1.62. During sampling, no significant differences were found in MCN frequencies at S1, which ranged from 2.2 to 3.6. At the other sampling sites, there were significant differences between the months evaluated, and MCN frequencies ranged from 1.3 to 6.5 at S2 and from 2.3 to 5.2 at S3. There were no associations between rainfall and MCN frequencies at the three sampling sites. Tradescantia pallida var. purpurea confirmed genotoxicity in the water bodies of the PMHLR, even at the head of the streams, which suggests that actions should be promoted to control anthropogenic effects in the streams of this conservation unit. Keywords

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Genotoxicity on Tradescantia pallida var. purpurea plants exposed to urban and rural environments in the metropolitan area of Porto Alegre, southern Brazil

Cited by 19 publications

References 22 publications

Biomonitoring the genotoxic potential of the air on Tradescantia pallida var. purpurea under climatic conditions in the Sinos River basin, Rio Grande do Sul, Brazil

Biomonitoring the genotoxic potential of the air on Tradescantia pallida var. purpurea under climatic conditions in the Sinos River basin, Rio Grande do Sul, Brazil

Evaluation of phytotoxicity of municipal landfill leachate before and after biological treatment

Biomonitoring of water genotoxicity in a Conservation Unit in the Sinos River Basin, Southern Brazil, using the <italic>Tradescantia</italic>micronucleus bioassay

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