Lipoxygenase-induced autoxidative degradation of terrestrial particulate organic matter in estuaries: A widespread process enhanced at high and low latitude
International audience There exists a substantial amount of research on abiotic (e.g. photochemical) degradation pertaining to organic matter (OM) in the marine realm. While recent research has shown its importance in the degradation of terrestrial particulate OM (TPOM), the mechanisms involved in t...
Published in: | Organic Geochemistry |
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Main Authors: | , , , , , , , , , , , |
Other Authors: | , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2018
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Subjects: | |
Online Access: | https://amu.hal.science/hal-02024195 https://amu.hal.science/hal-02024195/document https://amu.hal.science/hal-02024195/file/1rontani-2.pdf https://doi.org/10.1016/j.orggeochem.2017.10.013 |
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ftunivaixmarseil:oai:HAL:hal-02024195v1 |
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openpolar |
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Open Polar |
collection |
Aix-Marseille Université: HAL |
op_collection_id |
ftunivaixmarseil |
language |
English |
topic |
Terrestrial organic matter Estuaries Degradation Autoxidation Lipoxygenase Arctic Temperate and tropical zones [SDE]Environmental Sciences |
spellingShingle |
Terrestrial organic matter Estuaries Degradation Autoxidation Lipoxygenase Arctic Temperate and tropical zones [SDE]Environmental Sciences Galeron, Marie-Aimée Radakovitch, Olivier Charrìère, Bruno Vaultier, Frederic Volkman, John Bianchi, Thomas Ward, Nicolas Medeiros, Patricia Sawakuchi, Henrique Tank, Suzanne Kerhervé, Philippe Rontani, Jean-Francois Lipoxygenase-induced autoxidative degradation of terrestrial particulate organic matter in estuaries: A widespread process enhanced at high and low latitude |
topic_facet |
Terrestrial organic matter Estuaries Degradation Autoxidation Lipoxygenase Arctic Temperate and tropical zones [SDE]Environmental Sciences |
description |
International audience There exists a substantial amount of research on abiotic (e.g. photochemical) degradation pertaining to organic matter (OM) in the marine realm. While recent research has shown its importance in the degradation of terrestrial particulate OM (TPOM), the mechanisms involved in the induction of autoxidation in estuaries remain unclear. In this study, we propose for the first time the involvement of lipoxygenase (LOX) activity in the induction of autoxidation in mixed waters. The observation of unusual profiles of palmitoleic acid oxidation products and the presence of jasmonic acid in suspended particulate matter (SPM) collected close to the Rhône River, as well as in samples from the Mackenzie and Amazon rivers, is attributed to strong LOX activity. We show the role played by salinity in the induction of this LOX activity and provide an explanation for the differences in estuarine autoxidation level. At high latitude, lower temperatures and irradiance favor photooxidative damage to higher plant debris and, consequently, hydroperoxide production. High hydroperoxide content strongly contributes to LOX activation in mixed waters. The high resulting LOX activity enhances alkoxyl radical production and thus autoxidation. On the contrary, at low latitude, photooxidative effects are limited, and riverine autoxidation is favored. The higher hydroperoxide content of TPOM may, as a consequence, thereby also contribute to a high level of LOX activity and autoxidation in estuaries. In temperate zones, land and riverine photooxidative and autoxidative damage is limited, unlike estuaries where we observed significant LOX-induced and autox-idative damage. . |
author2 |
Institut méditerranéen d'océanologie (MIO) Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS) Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Centre de Formation et de Recherche sur les Environnements Méditérranéens (CEFREM) Université de Perpignan Via Domitia (UPVD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) CE Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS) Oceans and Atmosphere Flagship (CSIRO) CSIRO Oceans and Atmosphere Flagship University of Florida Gainesville (UF) Pacific Northwest National Laboratory (PNNL) Universidade de São Paulo = University of São Paulo (USP) University of Alberta ANR-11-IDEX-0001,Amidex,INITIATIVE D'EXCELLENCE AIX MARSEILLE UNIVERSITE(2011) |
format |
Article in Journal/Newspaper |
author |
Galeron, Marie-Aimée Radakovitch, Olivier Charrìère, Bruno Vaultier, Frederic Volkman, John Bianchi, Thomas Ward, Nicolas Medeiros, Patricia Sawakuchi, Henrique Tank, Suzanne Kerhervé, Philippe Rontani, Jean-Francois |
author_facet |
Galeron, Marie-Aimée Radakovitch, Olivier Charrìère, Bruno Vaultier, Frederic Volkman, John Bianchi, Thomas Ward, Nicolas Medeiros, Patricia Sawakuchi, Henrique Tank, Suzanne Kerhervé, Philippe Rontani, Jean-Francois |
author_sort |
Galeron, Marie-Aimée |
title |
Lipoxygenase-induced autoxidative degradation of terrestrial particulate organic matter in estuaries: A widespread process enhanced at high and low latitude |
title_short |
Lipoxygenase-induced autoxidative degradation of terrestrial particulate organic matter in estuaries: A widespread process enhanced at high and low latitude |
title_full |
Lipoxygenase-induced autoxidative degradation of terrestrial particulate organic matter in estuaries: A widespread process enhanced at high and low latitude |
title_fullStr |
Lipoxygenase-induced autoxidative degradation of terrestrial particulate organic matter in estuaries: A widespread process enhanced at high and low latitude |
title_full_unstemmed |
Lipoxygenase-induced autoxidative degradation of terrestrial particulate organic matter in estuaries: A widespread process enhanced at high and low latitude |
title_sort |
lipoxygenase-induced autoxidative degradation of terrestrial particulate organic matter in estuaries: a widespread process enhanced at high and low latitude |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://amu.hal.science/hal-02024195 https://amu.hal.science/hal-02024195/document https://amu.hal.science/hal-02024195/file/1rontani-2.pdf https://doi.org/10.1016/j.orggeochem.2017.10.013 |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
ISSN: 0146-6380 Organic Geochemistry https://amu.hal.science/hal-02024195 Organic Geochemistry, 2018, 115, pp.78-92. ⟨10.1016/j.orggeochem.2017.10.013⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.orggeochem.2017.10.013 hal-02024195 https://amu.hal.science/hal-02024195 https://amu.hal.science/hal-02024195/document https://amu.hal.science/hal-02024195/file/1rontani-2.pdf doi:10.1016/j.orggeochem.2017.10.013 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.orggeochem.2017.10.013 |
container_title |
Organic Geochemistry |
container_volume |
115 |
container_start_page |
78 |
op_container_end_page |
92 |
_version_ |
1786830043841822720 |
spelling |
ftunivaixmarseil:oai:HAL:hal-02024195v1 2023-12-31T10:04:10+01:00 Lipoxygenase-induced autoxidative degradation of terrestrial particulate organic matter in estuaries: A widespread process enhanced at high and low latitude Galeron, Marie-Aimée Radakovitch, Olivier Charrìère, Bruno Vaultier, Frederic Volkman, John Bianchi, Thomas Ward, Nicolas Medeiros, Patricia Sawakuchi, Henrique Tank, Suzanne Kerhervé, Philippe Rontani, Jean-Francois Institut méditerranéen d'océanologie (MIO) Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS) Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Centre de Formation et de Recherche sur les Environnements Méditérranéens (CEFREM) Université de Perpignan Via Domitia (UPVD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) CE Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS) Oceans and Atmosphere Flagship (CSIRO) CSIRO Oceans and Atmosphere Flagship University of Florida Gainesville (UF) Pacific Northwest National Laboratory (PNNL) Universidade de São Paulo = University of São Paulo (USP) University of Alberta ANR-11-IDEX-0001,Amidex,INITIATIVE D'EXCELLENCE AIX MARSEILLE UNIVERSITE(2011) 2018-01 https://amu.hal.science/hal-02024195 https://amu.hal.science/hal-02024195/document https://amu.hal.science/hal-02024195/file/1rontani-2.pdf https://doi.org/10.1016/j.orggeochem.2017.10.013 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.orggeochem.2017.10.013 hal-02024195 https://amu.hal.science/hal-02024195 https://amu.hal.science/hal-02024195/document https://amu.hal.science/hal-02024195/file/1rontani-2.pdf doi:10.1016/j.orggeochem.2017.10.013 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 0146-6380 Organic Geochemistry https://amu.hal.science/hal-02024195 Organic Geochemistry, 2018, 115, pp.78-92. ⟨10.1016/j.orggeochem.2017.10.013⟩ Terrestrial organic matter Estuaries Degradation Autoxidation Lipoxygenase Arctic Temperate and tropical zones [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2018 ftunivaixmarseil https://doi.org/10.1016/j.orggeochem.2017.10.013 2023-12-05T23:41:59Z International audience There exists a substantial amount of research on abiotic (e.g. photochemical) degradation pertaining to organic matter (OM) in the marine realm. While recent research has shown its importance in the degradation of terrestrial particulate OM (TPOM), the mechanisms involved in the induction of autoxidation in estuaries remain unclear. In this study, we propose for the first time the involvement of lipoxygenase (LOX) activity in the induction of autoxidation in mixed waters. The observation of unusual profiles of palmitoleic acid oxidation products and the presence of jasmonic acid in suspended particulate matter (SPM) collected close to the Rhône River, as well as in samples from the Mackenzie and Amazon rivers, is attributed to strong LOX activity. We show the role played by salinity in the induction of this LOX activity and provide an explanation for the differences in estuarine autoxidation level. At high latitude, lower temperatures and irradiance favor photooxidative damage to higher plant debris and, consequently, hydroperoxide production. High hydroperoxide content strongly contributes to LOX activation in mixed waters. The high resulting LOX activity enhances alkoxyl radical production and thus autoxidation. On the contrary, at low latitude, photooxidative effects are limited, and riverine autoxidation is favored. The higher hydroperoxide content of TPOM may, as a consequence, thereby also contribute to a high level of LOX activity and autoxidation in estuaries. In temperate zones, land and riverine photooxidative and autoxidative damage is limited, unlike estuaries where we observed significant LOX-induced and autox-idative damage. . Article in Journal/Newspaper Arctic Aix-Marseille Université: HAL Organic Geochemistry 115 78 92 |