Redox homeostasis disclosed in the saltmarsh plant Halimione portulacoides upon short waterborne exposure to inorganic mercury

Detalhes bibliográficos
Autor(a) principal: Pereira, Patrícia
Data de Publicação: 2024
Outros Autores: Pereira, Joana Luísa, Marques, Ana, Marques, Carlos, Brandão, Fátima, Cesário, Rute, Frankenbach, Silja, Serôdio, João, Gonçalves, Fernando J. M., Canário, João, Pacheco, Mário
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10773/42406
Resumo: The saltmarsh plant Halimione portulacoides was shortly exposed to realistic levels of inorganic mercury (iHg) with the aim of investigating the adaptative processes of the roots and leaves regarding redox homeostasis, physiology, and Hg accumulation. Plants were collected at a contaminated (CONT) and a reference (REF) site to address the interference of contamination backgrounds. The influence of major abiotic variables (i.e., temperature and light) was also examined. Total Hg levels, antioxidant enzymes, lipid peroxidation (LPO), and photosynthetic activity were analyzed after 2 and 4 h of exposure. A poor accumulation of Hg in the roots was noticed, and no translocation to the stems and leaves was found, but plants from the CONT site seemed more prone to iHg uptake (in winter). Despite this, antioxidant modulation in the roots and leaves was found, disclosing, in winter, higher thresholds for the induction of enzymatic antioxidants in CONT leaves compared to REF plants, denoting that the former are better prepared to cope with iHg redox pressure. Consistently, CONT leaves exposed to iHg had remarkably lower LPO levels. Exposure did not impair photosynthetic activity, pinpointing H. portulacoides' ability to cope with iHg toxicity under very-short-term exposure. Biochemical changes were noticed before enhancements in accumulation, reinforcing the relevance of these responses in precociously signaling iHg toxicity.
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spelling Redox homeostasis disclosed in the saltmarsh plant Halimione portulacoides upon short waterborne exposure to inorganic mercuryHalimione portulacoidesInorganic mercuryBioaccumulationAntioxidant defensesOxidative damagePhotosynthetic activityThe saltmarsh plant Halimione portulacoides was shortly exposed to realistic levels of inorganic mercury (iHg) with the aim of investigating the adaptative processes of the roots and leaves regarding redox homeostasis, physiology, and Hg accumulation. Plants were collected at a contaminated (CONT) and a reference (REF) site to address the interference of contamination backgrounds. The influence of major abiotic variables (i.e., temperature and light) was also examined. Total Hg levels, antioxidant enzymes, lipid peroxidation (LPO), and photosynthetic activity were analyzed after 2 and 4 h of exposure. A poor accumulation of Hg in the roots was noticed, and no translocation to the stems and leaves was found, but plants from the CONT site seemed more prone to iHg uptake (in winter). Despite this, antioxidant modulation in the roots and leaves was found, disclosing, in winter, higher thresholds for the induction of enzymatic antioxidants in CONT leaves compared to REF plants, denoting that the former are better prepared to cope with iHg redox pressure. Consistently, CONT leaves exposed to iHg had remarkably lower LPO levels. Exposure did not impair photosynthetic activity, pinpointing H. portulacoides' ability to cope with iHg toxicity under very-short-term exposure. Biochemical changes were noticed before enhancements in accumulation, reinforcing the relevance of these responses in precociously signaling iHg toxicity.MDPI2024-09-12T17:58:23Z2024-03-01T00:00:00Z2024-03info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10773/42406eng10.3390/toxics12030211Pereira, PatríciaPereira, Joana LuísaMarques, AnaMarques, CarlosBrandão, FátimaCesário, RuteFrankenbach, SiljaSerôdio, JoãoGonçalves, Fernando J. M.Canário, JoãoPacheco, Márioinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-09-16T01:47:14Zoai:ria.ua.pt:10773/42406Portal AgregadorONGhttps://www.rcaap.pt/oai/openairemluisa.alvim@gmail.comopendoar:71602024-09-16T01:47:14Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Redox homeostasis disclosed in the saltmarsh plant Halimione portulacoides upon short waterborne exposure to inorganic mercury
title Redox homeostasis disclosed in the saltmarsh plant Halimione portulacoides upon short waterborne exposure to inorganic mercury
spellingShingle Redox homeostasis disclosed in the saltmarsh plant Halimione portulacoides upon short waterborne exposure to inorganic mercury
Pereira, Patrícia
Halimione portulacoides
Inorganic mercury
Bioaccumulation
Antioxidant defenses
Oxidative damage
Photosynthetic activity
title_short Redox homeostasis disclosed in the saltmarsh plant Halimione portulacoides upon short waterborne exposure to inorganic mercury
title_full Redox homeostasis disclosed in the saltmarsh plant Halimione portulacoides upon short waterborne exposure to inorganic mercury
title_fullStr Redox homeostasis disclosed in the saltmarsh plant Halimione portulacoides upon short waterborne exposure to inorganic mercury
title_full_unstemmed Redox homeostasis disclosed in the saltmarsh plant Halimione portulacoides upon short waterborne exposure to inorganic mercury
title_sort Redox homeostasis disclosed in the saltmarsh plant Halimione portulacoides upon short waterborne exposure to inorganic mercury
author Pereira, Patrícia
author_facet Pereira, Patrícia
Pereira, Joana Luísa
Marques, Ana
Marques, Carlos
Brandão, Fátima
Cesário, Rute
Frankenbach, Silja
Serôdio, João
Gonçalves, Fernando J. M.
Canário, João
Pacheco, Mário
author_role author
author2 Pereira, Joana Luísa
Marques, Ana
Marques, Carlos
Brandão, Fátima
Cesário, Rute
Frankenbach, Silja
Serôdio, João
Gonçalves, Fernando J. M.
Canário, João
Pacheco, Mário
author2_role author
author
author
author
author
author
author
author
author
author
dc.contributor.author.fl_str_mv Pereira, Patrícia
Pereira, Joana Luísa
Marques, Ana
Marques, Carlos
Brandão, Fátima
Cesário, Rute
Frankenbach, Silja
Serôdio, João
Gonçalves, Fernando J. M.
Canário, João
Pacheco, Mário
dc.subject.por.fl_str_mv Halimione portulacoides
Inorganic mercury
Bioaccumulation
Antioxidant defenses
Oxidative damage
Photosynthetic activity
topic Halimione portulacoides
Inorganic mercury
Bioaccumulation
Antioxidant defenses
Oxidative damage
Photosynthetic activity
description The saltmarsh plant Halimione portulacoides was shortly exposed to realistic levels of inorganic mercury (iHg) with the aim of investigating the adaptative processes of the roots and leaves regarding redox homeostasis, physiology, and Hg accumulation. Plants were collected at a contaminated (CONT) and a reference (REF) site to address the interference of contamination backgrounds. The influence of major abiotic variables (i.e., temperature and light) was also examined. Total Hg levels, antioxidant enzymes, lipid peroxidation (LPO), and photosynthetic activity were analyzed after 2 and 4 h of exposure. A poor accumulation of Hg in the roots was noticed, and no translocation to the stems and leaves was found, but plants from the CONT site seemed more prone to iHg uptake (in winter). Despite this, antioxidant modulation in the roots and leaves was found, disclosing, in winter, higher thresholds for the induction of enzymatic antioxidants in CONT leaves compared to REF plants, denoting that the former are better prepared to cope with iHg redox pressure. Consistently, CONT leaves exposed to iHg had remarkably lower LPO levels. Exposure did not impair photosynthetic activity, pinpointing H. portulacoides' ability to cope with iHg toxicity under very-short-term exposure. Biochemical changes were noticed before enhancements in accumulation, reinforcing the relevance of these responses in precociously signaling iHg toxicity.
publishDate 2024
dc.date.none.fl_str_mv 2024-09-12T17:58:23Z
2024-03-01T00:00:00Z
2024-03
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10773/42406
url http://hdl.handle.net/10773/42406
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.3390/toxics12030211
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv MDPI
publisher.none.fl_str_mv MDPI
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv mluisa.alvim@gmail.com
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