Singlet oxygen‐induced alteration of bacteria associated with phytodetritus: Effect of irradiance
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 (1O2) to bacteria attached to phytoplanktonic cells. Under low irradiances, 1O2 is produced...
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| Veröffentlicht in: | Journal of phycology 2023-10, Vol.59 (5), p.980-988 |
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| creator | Burot, Christopher Bonin, Patricia Simon, Gwénola Casalot, Laurie Rontani, Jean‐François |
| description | 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 (1O2) to bacteria attached to phytoplanktonic cells. Under low irradiances, 1O2 is produced slowly, favors the oxidation of algal unsaturated lipids (photodynamic effect), and limits 1O2 transfer to attached bacteria. However, high irradiances induce a rapid and intense production of 1O2, 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. |
| doi_str_mv | 10.1111/jpy.13376 |
| format | Article |
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Under low irradiances, 1O2 is produced slowly, favors the oxidation of algal unsaturated lipids (photodynamic effect), and limits 1O2 transfer to attached bacteria. However, high irradiances induce a rapid and intense production of 1O2, 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.</description><identifier>ISSN: 0022-3646</identifier><identifier>EISSN: 1529-8817</identifier><identifier>DOI: 10.1111/jpy.13376</identifier><identifier>PMID: 37578996</identifier><language>eng</language><publisher>United States: Wiley Subscription Services, Inc</publisher><subject>Algae ; Arctic ; attached bacteria ; Bacteria ; Cells ; Chloroplasts ; Diatoms ; Ice cover ; Irradiance ; irradiance effect ; Irradiation ; Life Sciences ; Lipids ; Microbiology and Parasitology ; Oxidation ; Oxygen ; Particulate flux ; Photooxidation ; Polar environments ; Sea ice ; senescent phytoplankton ; Singlet oxygen ; sinking particulate matter ; type II photosensitized oxidation</subject><ispartof>Journal of phycology, 2023-10, Vol.59 (5), p.980-988</ispartof><rights>2023 Phycological Society of America.</rights><rights>2023, Phycological Society of America</rights><rights>Distributed under a Creative Commons Attribution 4.0 International License</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c3826-10856d8a0b14b871e6adf3db86c68ce7a456869a95710d66e7f74659b415c5a33</cites><orcidid>0000-0002-2403-6011 ; 0000-0002-4194-7343</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1111%2Fjpy.13376$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1111%2Fjpy.13376$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>230,314,776,780,881,1411,27901,27902,45550,45551</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/37578996$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink><backlink>$$Uhttps://hal.science/hal-04286500$$DView record in HAL$$Hfree_for_read</backlink></links><search><creatorcontrib>Burot, Christopher</creatorcontrib><creatorcontrib>Bonin, Patricia</creatorcontrib><creatorcontrib>Simon, Gwénola</creatorcontrib><creatorcontrib>Casalot, Laurie</creatorcontrib><creatorcontrib>Rontani, Jean‐François</creatorcontrib><title>Singlet oxygen‐induced alteration of bacteria associated with phytodetritus: Effect of irradiance</title><title>Journal of phycology</title><addtitle>J Phycol</addtitle><description>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 (1O2) to bacteria attached to phytoplanktonic cells. Under low irradiances, 1O2 is produced slowly, favors the oxidation of algal unsaturated lipids (photodynamic effect), and limits 1O2 transfer to attached bacteria. However, high irradiances induce a rapid and intense production of 1O2, 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.</description><subject>Algae</subject><subject>Arctic</subject><subject>attached bacteria</subject><subject>Bacteria</subject><subject>Cells</subject><subject>Chloroplasts</subject><subject>Diatoms</subject><subject>Ice cover</subject><subject>Irradiance</subject><subject>irradiance effect</subject><subject>Irradiation</subject><subject>Life Sciences</subject><subject>Lipids</subject><subject>Microbiology and Parasitology</subject><subject>Oxidation</subject><subject>Oxygen</subject><subject>Particulate flux</subject><subject>Photooxidation</subject><subject>Polar environments</subject><subject>Sea ice</subject><subject>senescent phytoplankton</subject><subject>Singlet oxygen</subject><subject>sinking particulate matter</subject><subject>type II photosensitized oxidation</subject><issn>0022-3646</issn><issn>1529-8817</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2023</creationdate><recordtype>article</recordtype><recordid>eNp1kctq3DAUhkVoSaZpF3mBYOgmXTiRbN2cXQhp0zKQQNtFV-JYkjMaPNZEkpt610foM-ZJounkAoWejTji03eO-BE6IPiY5DpZrqdjUteC76AZYVVTSknEKzTDuKrKmlO-h97EuMQYC87ILtqrBROyafgM6a9uuOltKvyv6cYO97__uMGM2poC-mQDJOeHwndFCzq3DgqI0WsHKRN3Li2K9WJK3tgUXBrjaXHRdVanzQsXAhgHg7Zv0esO-mjfPZ776PvHi2_nl-X86tPn87N5qWtZ8ZJgybiRgFtCWymI5WC62rSSay61FUAZl7yBhgmCDedWdIJy1rSUMM2grvfRh613Ab1aB7eCMCkPTl2ezdXmDtNKcobxT5LZoy27Dv52tDGplYva9j0M1o9RVZIRQgllG-37f9ClH8OQf5IpwSQVoqpehuvgYwy2e96AYLVJSeWU1N-UMnv4aBzblTXP5FMsGTjZAneut9P_TerL9Y-t8gHO05v7</recordid><startdate>202310</startdate><enddate>202310</enddate><creator>Burot, Christopher</creator><creator>Bonin, Patricia</creator><creator>Simon, Gwénola</creator><creator>Casalot, Laurie</creator><creator>Rontani, Jean‐François</creator><general>Wiley Subscription Services, Inc</general><general>Wiley</general><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7TN</scope><scope>F1W</scope><scope>H95</scope><scope>L.G</scope><scope>M7N</scope><scope>7X8</scope><scope>1XC</scope><scope>VOOES</scope><orcidid>https://orcid.org/0000-0002-2403-6011</orcidid><orcidid>https://orcid.org/0000-0002-4194-7343</orcidid></search><sort><creationdate>202310</creationdate><title>Singlet oxygen‐induced alteration of bacteria associated with phytodetritus: Effect of irradiance</title><author>Burot, Christopher ; 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Under low irradiances, 1O2 is produced slowly, favors the oxidation of algal unsaturated lipids (photodynamic effect), and limits 1O2 transfer to attached bacteria. However, high irradiances induce a rapid and intense production of 1O2, 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. 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| source | Wiley Online Library Journals Frontfile Complete |
| subjects | Algae Arctic attached bacteria Bacteria Cells Chloroplasts Diatoms Ice cover Irradiance irradiance effect Irradiation Life Sciences Lipids Microbiology and Parasitology Oxidation Oxygen Particulate flux Photooxidation Polar environments Sea ice senescent phytoplankton Singlet oxygen sinking particulate matter type II photosensitized oxidation |
| title | Singlet oxygen‐induced alteration of bacteria associated with phytodetritus: Effect of irradiance |
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