Photosynthesis and oxidative stress in the restinga plant species Eugenia uniflora L. exposed to simulated acid rain and iron ore dust deposition: Potential use in environmental risk assessment

dc.creatorNeves, Natália Rust
dc.creatorOliva, Marco Antonio
dc.creatorCenteno, Danilo da Cruz
dc.creatorCosta, Alan Carlos
dc.creatorRibas, Rogério Ferreira
dc.creatorPereira, Eduardo Gusmão
dc.date2018-05-16T11:47:48Z
dc.date2018-05-16T11:47:48Z
dc.date2009-03-24
dc.date.accessioned2023-09-27T21:07:59Z
dc.date.available2023-09-27T21:07:59Z
dc.identifier0048-9697
dc.identifierhttps://doi.org/10.1016/j.scitotenv.2009.02.035
dc.identifierhttp://www.locus.ufv.br/handle/123456789/19600
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8955197
dc.descriptionThe Brazilian sandy coastal plain named restinga is frequently subjected to particulate and gaseous emissions from iron ore factories. These gases may come into contact with atmospheric moisture and produce acid rain. The effects of the acid rain on vegetation, combined with iron excess in the soil, can lead to the disappearance of sensitive species and decrease restinga biodiversity. The effects of iron ore dust deposition and simulated acid rain on photosynthesis and on antioxidant enzymes were investigated in Eugenia uniflora, a representative shrub species of the restinga. This study aimed to determine the possible utility of this species in environmental risk assessment. After the application of iron ore dust as iron solid particulate matter (SPMFe) and simulated acid rain (pH 3.1), the 18-month old plants displayed brown spots and necrosis, typical symptoms of iron toxicity and injuries caused by acid rain, respectively. The acidity of the rain intensified leaf iron accumulation, which reached phytotoxic levels, mainly in plants exposed to iron ore dust. These plants showed the lowest values for net photosynthesis, stomatal conductance, transpiration, chlorophyll a content and electron transport rate through photosystem II (PSII). Catalase and superoxide dismutase activities were decreased by simulated acid rain. Peroxidase activity and membrane injury increased following exposure to acid rain and simultaneous SPMFe application. Eugenia uniflora exhibited impaired photosynthetic and antioxidative metabolism in response to combined iron and acid rain stresses. This species could become a valuable tool in environmental risk assessment in restinga areas near iron ore pelletizing factories. Non-invasive evaluations of visual injuries, photosynthesis and chlorophyll a fluorescence, as well as invasive biochemical analysis could be used as markers.
dc.formatpdf
dc.formatapplication/pdf
dc.languageeng
dc.publisherScience of The Total Environment
dc.relationVolume 407, Issue 12, Pages 3740-3745, June 2009
dc.rightsElsevier B.V.
dc.subjectAntioxidant enzymes
dc.subjectChlorophyll a fluorescence
dc.subjectEugenia uniflora
dc.subjectGas exchange
dc.subjectParticulate matter
dc.titlePhotosynthesis and oxidative stress in the restinga plant species Eugenia uniflora L. exposed to simulated acid rain and iron ore dust deposition: Potential use in environmental risk assessment
dc.typeArtigo


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