Acclimation of Red Sea macroalgae to solar radiation: photosynthesis and thallus absorptance
Autor(a) principal: | |
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Data de Publicação: | 2009 |
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/10400.1/12098 |
Resumo: | Thallus absorptance, daily courses of maximal quantum yields of chlorophyll fluorescence of photosystem II (F-v/F-m) and electron transport rates (ETR) were determined in 3 macroalgae (Hypnea spinella, Rhodophyta; Sargassum vulgare, Phaeophyta; and Ulva lactuca, Chlorophyta) collected from a low nutrient supply (LNS) ecosystem (Red Sea, Gulf of Aqaba, Eilat, Israel). In addition, U. lactuca grown previously in high nutrient supply (HNS) fishpond effluents was used to evaluate the effect of nutrient enrichment on photosynthesis. Short-term (2 d) and mid-term (5 d) effects of both photosynthetically active radiation (PAR) and full solar irradiance (PAB: PAR+UVA+UVB) at 3 solar irradiance treatments (no neutral filters, no NF; 2 neutral filter layers, 2NF; and 4 neutral filter layers, 4NF simulating levels of irradiance at 5, 10 and 20 m depth respectively) were evaluated in algae incubated with running seawater. Significant effects of time (variation throughout the day) and irradiance (number of neutral filters) on both F-v/F-m and ETR were observed. Photoinhibition occurred at noon under the no NF (up to 40% decrease) and 2NF (up to 30% decrease) treatments; however, full recovery in all treatments was reached in the afternoon (dynamic photoinhibition) except in H. spinella. The highest maximum ETR was observed in the no NF treatment despite its strongest photoinhibitory effect. The decrease in F-v/F-m at noon was similar to or higher under the PAB than under the PAR treatment alone, depending on the species. Photoinhibition was lower and the maximum ETR was higher in HNS than in LNS U. lactuca, indicating positive effects of nutrient supply on both photosynthesis and photoprotection. The maximum ETRs exhibited by different algae may be related to their zonation in the field and the resulting energy supply. |
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Acclimation of Red Sea macroalgae to solar radiation: photosynthesis and thallus absorptanceModulated pam fluorometryUv-B radiationChlorophyll fluorescenceBiooptical propertiesMarine macrophytesElectron-transportDepth distributionCoral-reefsLightPhotoinhibitionThallus absorptance, daily courses of maximal quantum yields of chlorophyll fluorescence of photosystem II (F-v/F-m) and electron transport rates (ETR) were determined in 3 macroalgae (Hypnea spinella, Rhodophyta; Sargassum vulgare, Phaeophyta; and Ulva lactuca, Chlorophyta) collected from a low nutrient supply (LNS) ecosystem (Red Sea, Gulf of Aqaba, Eilat, Israel). In addition, U. lactuca grown previously in high nutrient supply (HNS) fishpond effluents was used to evaluate the effect of nutrient enrichment on photosynthesis. Short-term (2 d) and mid-term (5 d) effects of both photosynthetically active radiation (PAR) and full solar irradiance (PAB: PAR+UVA+UVB) at 3 solar irradiance treatments (no neutral filters, no NF; 2 neutral filter layers, 2NF; and 4 neutral filter layers, 4NF simulating levels of irradiance at 5, 10 and 20 m depth respectively) were evaluated in algae incubated with running seawater. Significant effects of time (variation throughout the day) and irradiance (number of neutral filters) on both F-v/F-m and ETR were observed. Photoinhibition occurred at noon under the no NF (up to 40% decrease) and 2NF (up to 30% decrease) treatments; however, full recovery in all treatments was reached in the afternoon (dynamic photoinhibition) except in H. spinella. The highest maximum ETR was observed in the no NF treatment despite its strongest photoinhibitory effect. The decrease in F-v/F-m at noon was similar to or higher under the PAB than under the PAR treatment alone, depending on the species. Photoinhibition was lower and the maximum ETR was higher in HNS than in LNS U. lactuca, indicating positive effects of nutrient supply on both photosynthesis and photoprotection. The maximum ETRs exhibited by different algae may be related to their zonation in the field and the resulting energy supply.CGL2007-66095/BOSCGL2008 05407-C03-01AGL2005-02655Inter-ResearchSapientiaFigueroa, Felix L.Martinez, BrezoIsrael, AlvaroNeori, AmirMalta, Erik-janAng, Put, Jr.Inken, SvenMarquardt, RonnyRachamim, TamarArazi, UriFrenk, SammyKorbee, Nathalie2018-12-07T14:58:34Z20092009-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.1/12098eng1864-779010.3354/ab00186info: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:RCAAP2023-08-02T02:01:52Zoai:sapientia.ualg.pt:10400.1/12098Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:03:30.183641Repositório 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 |
Acclimation of Red Sea macroalgae to solar radiation: photosynthesis and thallus absorptance |
title |
Acclimation of Red Sea macroalgae to solar radiation: photosynthesis and thallus absorptance |
spellingShingle |
Acclimation of Red Sea macroalgae to solar radiation: photosynthesis and thallus absorptance Figueroa, Felix L. Modulated pam fluorometry Uv-B radiation Chlorophyll fluorescence Biooptical properties Marine macrophytes Electron-transport Depth distribution Coral-reefs Light Photoinhibition |
title_short |
Acclimation of Red Sea macroalgae to solar radiation: photosynthesis and thallus absorptance |
title_full |
Acclimation of Red Sea macroalgae to solar radiation: photosynthesis and thallus absorptance |
title_fullStr |
Acclimation of Red Sea macroalgae to solar radiation: photosynthesis and thallus absorptance |
title_full_unstemmed |
Acclimation of Red Sea macroalgae to solar radiation: photosynthesis and thallus absorptance |
title_sort |
Acclimation of Red Sea macroalgae to solar radiation: photosynthesis and thallus absorptance |
author |
Figueroa, Felix L. |
author_facet |
Figueroa, Felix L. Martinez, Brezo Israel, Alvaro Neori, Amir Malta, Erik-jan Ang, Put, Jr. Inken, Sven Marquardt, Ronny Rachamim, Tamar Arazi, Uri Frenk, Sammy Korbee, Nathalie |
author_role |
author |
author2 |
Martinez, Brezo Israel, Alvaro Neori, Amir Malta, Erik-jan Ang, Put, Jr. Inken, Sven Marquardt, Ronny Rachamim, Tamar Arazi, Uri Frenk, Sammy Korbee, Nathalie |
author2_role |
author author author author author author author author author author author |
dc.contributor.none.fl_str_mv |
Sapientia |
dc.contributor.author.fl_str_mv |
Figueroa, Felix L. Martinez, Brezo Israel, Alvaro Neori, Amir Malta, Erik-jan Ang, Put, Jr. Inken, Sven Marquardt, Ronny Rachamim, Tamar Arazi, Uri Frenk, Sammy Korbee, Nathalie |
dc.subject.por.fl_str_mv |
Modulated pam fluorometry Uv-B radiation Chlorophyll fluorescence Biooptical properties Marine macrophytes Electron-transport Depth distribution Coral-reefs Light Photoinhibition |
topic |
Modulated pam fluorometry Uv-B radiation Chlorophyll fluorescence Biooptical properties Marine macrophytes Electron-transport Depth distribution Coral-reefs Light Photoinhibition |
description |
Thallus absorptance, daily courses of maximal quantum yields of chlorophyll fluorescence of photosystem II (F-v/F-m) and electron transport rates (ETR) were determined in 3 macroalgae (Hypnea spinella, Rhodophyta; Sargassum vulgare, Phaeophyta; and Ulva lactuca, Chlorophyta) collected from a low nutrient supply (LNS) ecosystem (Red Sea, Gulf of Aqaba, Eilat, Israel). In addition, U. lactuca grown previously in high nutrient supply (HNS) fishpond effluents was used to evaluate the effect of nutrient enrichment on photosynthesis. Short-term (2 d) and mid-term (5 d) effects of both photosynthetically active radiation (PAR) and full solar irradiance (PAB: PAR+UVA+UVB) at 3 solar irradiance treatments (no neutral filters, no NF; 2 neutral filter layers, 2NF; and 4 neutral filter layers, 4NF simulating levels of irradiance at 5, 10 and 20 m depth respectively) were evaluated in algae incubated with running seawater. Significant effects of time (variation throughout the day) and irradiance (number of neutral filters) on both F-v/F-m and ETR were observed. Photoinhibition occurred at noon under the no NF (up to 40% decrease) and 2NF (up to 30% decrease) treatments; however, full recovery in all treatments was reached in the afternoon (dynamic photoinhibition) except in H. spinella. The highest maximum ETR was observed in the no NF treatment despite its strongest photoinhibitory effect. The decrease in F-v/F-m at noon was similar to or higher under the PAB than under the PAR treatment alone, depending on the species. Photoinhibition was lower and the maximum ETR was higher in HNS than in LNS U. lactuca, indicating positive effects of nutrient supply on both photosynthesis and photoprotection. The maximum ETRs exhibited by different algae may be related to their zonation in the field and the resulting energy supply. |
publishDate |
2009 |
dc.date.none.fl_str_mv |
2009 2009-01-01T00:00:00Z 2018-12-07T14:58:34Z |
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/10400.1/12098 |
url |
http://hdl.handle.net/10400.1/12098 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
1864-7790 10.3354/ab00186 |
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 |
Inter-Research |
publisher.none.fl_str_mv |
Inter-Research |
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 |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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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 |
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