Metabolic responses to desalination brine discharges in field-transplanted Posidonia oceanica: Advances for the development of specific early warning biomarkers

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Title: Metabolic responses to desalination brine discharges in field-transplanted Posidonia oceanica: Advances for the development of specific early warning biomarkers
Authors: Blanco Murillo, Fabio | Marín-Guirao, Lázaro | Sola Macia, Iván | Carbonell Garzón, Estela | Rodríguez-Rojas, Fernanda | Sánchez-Lizaso, José Luis | Sáez, Claudio A.
Research Group/s: Biología Marina | Recursos Hídricos y Desarrollo Sostenible
Center, Department or Service: Universidad de Alicante. Departamento de Ciencias del Mar y Biología Aplicada
Keywords: Seagrass | Desalination | Oxidative stress | Gene expression | Biomonitoring
Issue Date: 29-Jan-2024
Publisher: Elsevier
Citation: Desalination. 2024, 576: 117395.
Abstract: Water desalination has become an important process to cope with water scarcity in the Mediterranean basin; however, the endemic seagrass Posidonia oceanica may be susceptible to high-salinity brines derived from this industry. To understand how brine affects metabolic processes in P. oceanica, transplantation experiments were performed in two sites exposed to a brine dilution plume derived from a desalination plant in Alicante (Spain). P. oceanica individuals were transplanted in three locations, i.e., a control site (∼37 psu), an intermediate influence site (IB, ∼39.5 psu), and a high-influence site (HB, ∼42 psu), and were monitored for 6 days. The metabolic endpoints of reactive oxygen species (i.e., H2O2, lipid peroxidation, and ascorbate cycle) and the regulation of genes involved in antioxidant and osmoregulation responses [please complete sentence]. The concentration of H2O2 and thiobarbituric acid reactive substances (TBARS) increased, while that of ascorbate (ASC) decreased in HB, indicating excessive ROS production, lipid peroxidation, and antioxidant consumption. Genes related to osmoregulation (SOS1, SOS3, AKT2/3) and antioxidant response (GR, APX, FeSOD, MnSOD, and STRK1) were upregulated in brine-exposed plants, especially at the early stages of the experiment. This novel approach has provided a battery of biomarkers that may serve as early warning tools for rapid action mitigation to avoid the negative effects of salinity on P. oceanica at the population and community levels. This approach can be also globally applied to relevant macrophytes in environmental monitoring programs to address other stressors and their isolated or combined contribution to marine pollution.
Sponsor: This investigation was funded by H2020 Marie Skłodowska-Curie Actions (888415) granted to C.A. Sáez. F. Blanco-Murillo was supported by a grant from Universidad de Alicante (Grant ID: FPUUA98). F. Rodríguez-Rojas was financed by the ANID project FONDECYT #11220425. C.A. Sáez was also financed by project ANID InES I+D 2021 (INID210013). I. Sola was funded by a grant from European Union-Next Generation EU (MARSALAS21-30).
ISSN: 0011-9164 (Print) | 1873-4464 (Online)
DOI: 10.1016/j.desal.2024.117395
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2024 Published by Elsevier B.V.
Peer Review: si
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Appears in Collections:INV - BM - Artículos Científicos / Scientific Papers
INV - Recursos Hídricos y Desarrollo Sostenible - Artículos de Revistas
Research funded by the EU

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