Effect of lead on photosynthetic pigments, antioxidant responses, metabolomics, thalli morphology and cell ultrastructure of Iridaea cordata (Rhodophyta) from Antarctica.

Autor: Trentin R; Department of Biology, University of Padova, Via U. Bassi 58/B, 35131 Padova, Italy. Electronic address: riccardo.trentin.2@studenti.unipd.it., Nai I; Department of Biology, University of Padova, Via U. Bassi 58/B, 35131 Padova, Italy., Schumann S; Department of Biology, University of Padova, Via U. Bassi 58/B, 35131 Padova, Italy., Santovito G; Department of Biology, University of Padova, Via U. Bassi 58/B, 35131 Padova, Italy., Moschin E; Department of Biology, University of Padova, Via U. Bassi 58/B, 35131 Padova, Italy., Custódio L; Centre of Marine Sciences, Faculty of Sciences and Technology, University of Algarve, Ed. 7, Campus of Gambelas, 8005-139 Faro, Portugal., Moro I; Department of Biology, University of Padova, Via U. Bassi 58/B, 35131 Padova, Italy; Department of Integrative Marine Ecology, Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Napoli, Italy.
Jazyk: angličtina
Zdroj: Comparative biochemistry and physiology. Toxicology & pharmacology : CBP [Comp Biochem Physiol C Toxicol Pharmacol] 2025 Jan; Vol. 287, pp. 110063. Date of Electronic Publication: 2024 Oct 29.
DOI: 10.1016/j.cbpc.2024.110063
Abstrakt: Over the past decades, the concern about lead pollution in marine environments has increased due to its remarkable toxicity, even at low concentrations. Lead is one of the significant contaminants arising from human activities in Antarctica. However, its effects on polar photosynthetic organisms are poorly known. This work aims to evaluate the effects of two different environmental concentrations of lead (10 μg/L and 50 μg/L) on pigment content, antioxidant enzyme activities (catalase, superoxide dismutase, ascorbate peroxidase and glutathione-S-transferase), metabolome, thalli morphology and cell ultrastructure of the red seaweed Iridaea cordata (Turner) Bory from Terra Nova Bay (Ross Sea, Antarctica). The results highlighted that lead exposure decreased phycocyanin and phycoerythrin content, starting from 10 μg/L, while induced carotenoid accumulation at 50 μg/L. Catalase, ascorbate peroxidase, and superoxide dismutase activities generally increased after lead exposure and distinct biochemical features were identified in the control and treatment groups. Further lead-related effects on cell ultrastructure comprised floridean starch accumulation and plastoglobuli formation. Overall, our results suggested that the enhanced formation of reactive oxygen species in response to lead altered the photosynthetic pigment pattern, antioxidant defenses, metabolome and ultrastructure of I. cordata.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 The Authors. Published by Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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