Singlet oxygen‐induced alteration of bacteria associated with phytodetritus: Effect of irradiance
International audience Contrasting irradiation of senescent cells of the diatom Thalassiosira sp. in association with the bacterium Pseudomonas stutzeri showed the effect of intensity of irradiance on the transfer of singlet oxygen ( 1 O 2 ) to bacteria attached to phytoplanktonic cells. Under low i...
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Online Access: | https://hal.science/hal-04286500 https://hal.science/hal-04286500/document https://hal.science/hal-04286500/file/JPY-22-138-ART.R2_Proof_hi.pdf https://doi.org/10.1111/jpy.13376 |
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ftinsu:oai:HAL:hal-04286500v1 2023-12-31T10:03:30+01:00 Singlet oxygen‐induced alteration of bacteria associated with phytodetritus: Effect of irradiance Burot, Christopher Bonin, Patricia Simon, Gwénola Casalot, Laurie Rontani, Jean‐françois 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) 2023 https://hal.science/hal-04286500 https://hal.science/hal-04286500/document https://hal.science/hal-04286500/file/JPY-22-138-ART.R2_Proof_hi.pdf https://doi.org/10.1111/jpy.13376 en eng HAL CCSD Wiley info:eu-repo/semantics/altIdentifier/doi/10.1111/jpy.13376 hal-04286500 https://hal.science/hal-04286500 https://hal.science/hal-04286500/document https://hal.science/hal-04286500/file/JPY-22-138-ART.R2_Proof_hi.pdf doi:10.1111/jpy.13376 info:eu-repo/semantics/OpenAccess ISSN: 0022-3646 EISSN: 1529-8817 Journal of Phycology https://hal.science/hal-04286500 Journal of Phycology, 2023, 59 (5), pp.980-988. ⟨10.1111/jpy.13376⟩ Arctic attached bacteria irradiance effect sea ice senescent phytoplankton sinking particulate matter type II photosensitized oxidation [SDV.MP]Life Sciences [q-bio]/Microbiology and Parasitology info:eu-repo/semantics/article Journal articles 2023 ftinsu https://doi.org/10.1111/jpy.13376 2023-12-06T17:23:17Z International audience Contrasting irradiation of senescent cells of the diatom Thalassiosira sp. in association with the bacterium Pseudomonas stutzeri showed the effect of intensity of irradiance on the transfer of singlet oxygen ( 1 O 2 ) to bacteria attached to phytoplanktonic cells. Under low irradiances, 1 O 2 is produced slowly, favors the oxidation of algal unsaturated lipids (photodynamic effect), and limits 1 O 2 transfer to attached bacteria. However, high irradiances induce a rapid and intense production of 1 O 2 , which diffuses out of the chloroplasts and easily reaches the attached bacteria, where it efficiently oxidizes their unsaturated membrane components. Analysis of numerous sinking particle samples collected in different regions of the Canadian Arctic showed that the photooxidation state of attached bacteria increased from ice‐covered areas to open water, in agreement with in vitro results. Photooxidation of bacteria appeared to be particularly intense in sea ice, where the sympagic algae–bacteria association is maintained at relatively high irradiances for long periods of time. Article in Journal/Newspaper Arctic Phytoplankton Sea ice ice covered areas Institut national des sciences de l'Univers: HAL-INSU Journal of Phycology 59 5 980 988 |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
Arctic attached bacteria irradiance effect sea ice senescent phytoplankton sinking particulate matter type II photosensitized oxidation [SDV.MP]Life Sciences [q-bio]/Microbiology and Parasitology |
spellingShingle |
Arctic attached bacteria irradiance effect sea ice senescent phytoplankton sinking particulate matter type II photosensitized oxidation [SDV.MP]Life Sciences [q-bio]/Microbiology and Parasitology Burot, Christopher Bonin, Patricia Simon, Gwénola Casalot, Laurie Rontani, Jean‐françois Singlet oxygen‐induced alteration of bacteria associated with phytodetritus: Effect of irradiance |
topic_facet |
Arctic attached bacteria irradiance effect sea ice senescent phytoplankton sinking particulate matter type II photosensitized oxidation [SDV.MP]Life Sciences [q-bio]/Microbiology and Parasitology |
description |
International audience Contrasting irradiation of senescent cells of the diatom Thalassiosira sp. in association with the bacterium Pseudomonas stutzeri showed the effect of intensity of irradiance on the transfer of singlet oxygen ( 1 O 2 ) to bacteria attached to phytoplanktonic cells. Under low irradiances, 1 O 2 is produced slowly, favors the oxidation of algal unsaturated lipids (photodynamic effect), and limits 1 O 2 transfer to attached bacteria. However, high irradiances induce a rapid and intense production of 1 O 2 , which diffuses out of the chloroplasts and easily reaches the attached bacteria, where it efficiently oxidizes their unsaturated membrane components. Analysis of numerous sinking particle samples collected in different regions of the Canadian Arctic showed that the photooxidation state of attached bacteria increased from ice‐covered areas to open water, in agreement with in vitro results. Photooxidation of bacteria appeared to be particularly intense in sea ice, where the sympagic algae–bacteria association is maintained at relatively high irradiances for long periods of time. |
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) |
format |
Article in Journal/Newspaper |
author |
Burot, Christopher Bonin, Patricia Simon, Gwénola Casalot, Laurie Rontani, Jean‐françois |
author_facet |
Burot, Christopher Bonin, Patricia Simon, Gwénola Casalot, Laurie Rontani, Jean‐françois |
author_sort |
Burot, Christopher |
title |
Singlet oxygen‐induced alteration of bacteria associated with phytodetritus: Effect of irradiance |
title_short |
Singlet oxygen‐induced alteration of bacteria associated with phytodetritus: Effect of irradiance |
title_full |
Singlet oxygen‐induced alteration of bacteria associated with phytodetritus: Effect of irradiance |
title_fullStr |
Singlet oxygen‐induced alteration of bacteria associated with phytodetritus: Effect of irradiance |
title_full_unstemmed |
Singlet oxygen‐induced alteration of bacteria associated with phytodetritus: Effect of irradiance |
title_sort |
singlet oxygen‐induced alteration of bacteria associated with phytodetritus: effect of irradiance |
publisher |
HAL CCSD |
publishDate |
2023 |
url |
https://hal.science/hal-04286500 https://hal.science/hal-04286500/document https://hal.science/hal-04286500/file/JPY-22-138-ART.R2_Proof_hi.pdf https://doi.org/10.1111/jpy.13376 |
genre |
Arctic Phytoplankton Sea ice ice covered areas |
genre_facet |
Arctic Phytoplankton Sea ice ice covered areas |
op_source |
ISSN: 0022-3646 EISSN: 1529-8817 Journal of Phycology https://hal.science/hal-04286500 Journal of Phycology, 2023, 59 (5), pp.980-988. ⟨10.1111/jpy.13376⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1111/jpy.13376 hal-04286500 https://hal.science/hal-04286500 https://hal.science/hal-04286500/document https://hal.science/hal-04286500/file/JPY-22-138-ART.R2_Proof_hi.pdf doi:10.1111/jpy.13376 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1111/jpy.13376 |
container_title |
Journal of Phycology |
container_volume |
59 |
container_issue |
5 |
container_start_page |
980 |
op_container_end_page |
988 |
_version_ |
1786822491179581440 |