Loading content, please wait..
Version 3.22
Publication Type J
Authors Brito, P., R. A. Ferreira, S. Martins-Dias, O. M. Azevedo, M. Caetano and I. Cacador
Title Cerium uptake, translocation and toxicity in the salt marsh halophyte Halimione portulacoides (L.), Aellen
Source Chemosphere
Language English
Author Keywords Antioxidant enzymes Cerium Halimione portulacoides Oxidative stress Salt marshes rare-earth-elements oryza-sativa l. tagus estuary oxide nanoparticles oxidative stress iron plaque engineered nanomaterials ceo2 nanoparticles seasonal-variation mercury mobility Environmental Sciences & Ecology
Abstract Halimione portulacoides plants were exposed to dissolved cerium (Ce) in a hydroponic medium for five days. Ce accumulation in plants followed the metal's increase in the medium although with a very low translocation factor (TF < 0.01) between roots and shoots. Ce median concentrations in roots were 586, 988 and 1103 mu g/g (dry wt.), while in shoots the median values reached 1.9, 3.5 and 10.0 mu g/g (dry wt.), for plants exposed to 300, 600 and 1200 mu g/L of Ce, respectively. No significant differences occurred in the length of roots and shoots among treatment groups, albeit plants exposed to the highest Ce concentration showed a clear loss of turgor pressure on the fifth day. An increase of hydrogen peroxide and malondialdehyde levels were observed in the plant shoots at 1200 mu g/L of Ce. The highest concentration also triggered an answer by the shoots' antioxidant enzymes with a decrease in the activity of superoxide dismutase and an increase in peroxidase. However, no significant change in catalase activity was observed, compared to the control group, which may indicate that peroxidase played a more crucial role against the oxidative stress than catalase. Combined results indicate that H. portulacoides was actively responding to a toxic effect imposed by this higher Ce concentration. Nevertheless, changes in normal environmental conditions, may increase the bioavailability of Ce, while in areas where acid mine drainage may occur, the highest Ce concentration tested in this study may be largely exceeded, placing the sustainability of halophytes and estuarine marshes at risk. (C) 2020 Elsevier Ltd. All rights reserved.
Author Address [Brito, Pedro; Caetano, Miguel] Inst Portugues Mar & Atmosfera, IPMA, Rua Dr Alfredo Magalhaes Ramalho 6, P-1495006 Lisbon, Portugal. [Brito, Pedro; Cacador, Isabel] Univ Lisbon, Fac Ciencias, Ctr Ciencias Mar & Ambiente, Mare FCUL, P-1749016 Lisbon, Portugal. [Ferreira, Renata A.] Univ Lisbon, Ctr Recursos Nat & Ambiente, Inst Super Tecn, CERENA, Av Rovisco Pais, P-1049001 Lisbon, Portugal. [Martins-Dias, Susete] Univ Lisbon, Ctr Recursos Nat & Ambiente, Inst Super Tecn, CERENA,DBE, Av Rovisco Pais, P-1049001 Lisbon, Portugal. [Azevedo, Olga M.] Univ Basque Country, Res Ctr Expt Marine Biol & Biotechnol PiE UPV EHU, Leioa, Basque Country, Spain. [Caetano, Miguel] Univ Porto, Ctr Interdisciplinar Invest Marinha & Ambiental, Av Gen Norton de Matos S-N, P-4450208 Matosinhos, Portugal. Brito, P (corresponding author), Inst Portugues Mar & Atmosfera, IPMA, Rua Dr Alfredo Magalhaes Ramalho 6, P-1495006 Lisbon, Portugal. pbrito@ipma.pt
ISSN 0045-6535
ISBN 0045-6535
29-Character Source Abbreviation Chemosphere
Publication Date Mar
Year Published 2021
Volume 266
Beginning Page 11
Digital Object Identifier (DOI) 10.1016/j.chemosphere.2020.128973
Unique Article Identifier WOS:000674624300042

LEGAL NOTICES — This website is protected by Copyright © The University of Sussex, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021. The eHALOPH database is protected by Database Right and Copyright © The University of Sussex and other contributors, 2006, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021. This database is based on an earlier work by James Aronson.

Contact email: halophytes@sussex.ac.uk
Credits – Tim Flowers, Joaquim Santos, Moritz Jahns, Brian Warburton, Peter Reed