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Publication Type J
Authors Figueira, E., D. Matos, P. Cardoso, C. Sa, C. Fernandes, R. Tauler and C. Bedia
Title An underground strategy to increase mercury tolerance in the salt marsh halophyte Juncus maritimus Lam.: Lipid remodelling and Hg restriction
Source Environmental and Experimental Botany
Language English
Author Keywords Salt-marsh Mercury Antioxidant mechanisms Membrane rafts Lipids Juncus maritimus plant stress sterols biosynthesis accumulation diversity membranes toxicity proteins Plant Sciences Environmental Sciences & Ecology
Abstract Salt marshes are coastal ecosystems which are declining due to global warming and pollution, such as mercury (Hg) pollution. The extra- and intracellular mechanisms of tolerance to Hg in plants are identified but the involvement of the plasma membrane is poorly known. This study aims to identify the effects induced by Hg in plant membranes and to unravel their role on plants tolerance to Hg. Juncus maritimus was collected from a salt marsh historically contaminated with Hg. Two sites differing in Hg contamination were chosen. Hg concentration, membrane damage, antioxidant response and lipidomic analysis were performed in the different plant organs (roots, rhizome and leaves). The strategy of J. maritimus to tolerate environments contaminated by Hg seems to rely on restricting the entrance of Hg into the root cells, with a remodeling of root lipids contributing to the efficiency of this mechanism. The root lipids remodelling acts by protecting the cellular metabolism from Hg toxicity and thus reducing the effort of cells in counteracting Hg effects (e.g., antioxidant mechanisms). This knowledge can be used to develop strategies to preserve these important but vulnerable ecosystems, and can also be relevant for phytoremediation approaches.
Author Address [Figueira, Etelvina; Matos, Diana; Cardoso, Paulo; Sa, Carina; Fernandes, Celia] Univ Aveiro, Dept Biol, P-3810193 Aveiro, Portugal. [Figueira, Etelvina; Cardoso, Paulo] Univ Aveiro, CESAM Ctr Environm & Marine Studies, P-3810193 Aveiro, Portugal. [Tauler, Roma; Bedia, Carmen] Inst Environm Assessment & Water Res IDAEA CSIC, Dept Environm Chem, C Jordi Girona 18-24, Barcelona 08034, Spain. Figueira, E (corresponding author), Univ Aveiro, Dept Biol, P-3810193 Aveiro, Portugal.; Figueira, E (corresponding author), Univ Aveiro, CESAM Ctr Environm & Marine Studies, P-3810193 Aveiro, Portugal. efigueira@ua.pt
ISSN 0098-8472
ISBN 0098-8472
29-Character Source Abbreviation Environ. Exp. Bot.
Publication Date Nov
Year Published 2021
Volume 191
Beginning Page 10
Digital Object Identifier (DOI) 10.1016/j.envexpbot.2021.104619
Unique Article Identifier WOS:000694724000010

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