Redox homeostasis disclosed in the saltmarsh plant Halimione portulacoides upon short waterborne exposure to inorganic mercury
Autor(a) principal: | |
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Data de Publicação: | 2024 |
Outros Autores: | , , , , , , , , , |
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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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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7160 |
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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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1817547182362853376 |