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Effects of copper and lead exposure on the ecophysiology of the brown seaweed Sargassum cymosum.(Report)

Costa, Giulia Burle ; Felix, Marthiellen R. L. ; Simioni, Carmen ; Ramlov, Fernanda ; Oliveira, Eva Regina ; Pereira, Debora T. ; Maraschin, Marcelo ; Chow, Fungyi ; Horta, Paulo Antunes ; Lalau, Cristina Moreira ; Costa, Cristina H. ; Matias, William Gerson ; Bouzon, Zenilda L. ; Schmidt, Eder C.

Protoplasma, 2016, Vol.253(1), p.111(15) [Periódico revisado por pares]

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  • Título:
    Effects of copper and lead exposure on the ecophysiology of the brown seaweed Sargassum cymosum.(Report)
  • Autor: Costa, Giulia Burle ; Felix, Marthiellen R. L. ; Simioni, Carmen ; Ramlov, Fernanda ; Oliveira, Eva Regina ; Pereira, Debora T. ; Maraschin, Marcelo ; Chow, Fungyi ; Horta, Paulo Antunes ; Lalau, Cristina Moreira ; Costa, Cristina H. ; Matias, William Gerson ; Bouzon, Zenilda L. ; Schmidt, Eder C.
  • Assuntos: Biphenyl (Compound) – Physiological Aspects ; Photosynthesis – Physiological Aspects ; Cells (Biology) – Physiological Aspects ; Heavy Metals – Physiological Aspects
  • É parte de: Protoplasma, 2016, Vol.253(1), p.111(15)
  • Descrição: To access, purchase, authenticate, or subscribe to the full-text of this article, please visit this link: http://dx.doi.org/10.1007/s00709-015-0795-4 Byline: Giulia Burle Costa (1), Marthiellen R. L. Felix (1), Carmen Simioni (1), Fernanda Ramlov (3), Eva Regina Oliveira (3), Debora T. Pereira (2), Marcelo Maraschin (3), Fungyi Chow (4), Paulo Antunes Horta (5), Cristina Moreira Lalau (6), Cristina H. Costa (6), William Gerson Matias (6), Zenilda L. Bouzon (1), Eder C. Schmidt (7) Keywords: Sargassum cymosum; Ecophysiology; Biosorption; Metal uptake; Photosynthetic efficiency; Cellular structure Abstract: The effects of the heavy metals copper (Cu) and lead (Pb) on Sargassum cymosum were evaluated by determining uptake capacity, growth rates, photosynthetic efficiency, contents of photosynthetic pigments and phenolic compounds, 2,2-diphenyl-1-picrylhydrazyl radical-scavenging capacity, and morphological and cellular changes. S. cymosum was cultivated with Cu and Pb separately and combined at concentrations of 10, 25, and 50 [micro]M for 7 days in laboratory-controlled conditions. Seaweeds under Cu treatment showed the highest biosorption capacity, and growth rates were significantly reduced compared to the control. The photosynthesis/irradiance curves showed alterations in kinetic patterns in the metal-treated samples. Specifically, Cu treatment alone inhibited electron transport rate (ETR) response, while Pb alone induced it. However, samples treated with both Cu and Pb (Cu+Pb) showed inhibition in ETR. The total amount of pigments increased relative to control. Light microscopy showed an increase in phenolic compounds, with physodes migrating towards cortical cells. Scanning electronic microscopy revealed alterations in the typical rough surface of thallus, when compared with control, especially for Pb treatments. Based on these results, it could be concluded that Cu and Pb are stress factors for S. cymosum, promoting alterations in seaweed metabolism and stimulating protective mechanisms against oxidative stress. However, the high bioaccumulation capacity of both heavy metals indicates a possible application for S. cymosum as a biosorbent agent for contaminated wastewater when metals are in low concentrations. Author Affiliation: (1) Plant Cell Biology Laboratory, Department of Cell Biology, Embryology and Genetics, Federal University of Santa Catarina, 88049-900, CP 476, Florianopolis, SC, Brazil (2) Scientific Initiation-PIBIC-CNPq, Department of Cell Biology, Embryology and Genetics, Federal University of Santa Catarina, 88049-900, CP 476, Florianopolis, SC, Brazil (3) Plant Morphogenesis and Biochemistry Laboratory, Federal University of Santa Catarina, 88049-900, CP 476, Florianopolis, SC, Brazil (4) Institute of Bioscience, University of Sao Paulo, 05508-090, Sao Paulo, SP, Brazil (5) Phycology Laboratory, Department of Botany, Federal University of Santa Catarina, 88010-970, Florianopolis, SC, Brazil (6) Postgraduate Program in Environmental Engineering, Department of Environmental and Sanitary Engineering, Federal University of Santa Catarina, 88049-970, CP 0476, Florianopolis, SC, Brazil (7) Postgraduate Program in Cell Biology and Development, Department of Cell Biology, Embryology and Genetics, Federal University of Santa Catarina, 88049-900, CP 476, Florianopolis, SC, Brazil Article History: Registration Date: 02/03/2015 Received Date: 27/10/2014 Accepted Date: 02/03/2015 Online Date: 15/03/2015 Article note: Handling Editor: Andreas Holzinger Electronic supplementary material The online version of this article (doi: 10.1007/s00709-015-0795-4) contains supplementary material, which is available to authorized users.
  • Idioma: Inglês

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