Temperature benefits the photosynthetic performance of the diatoms Chaetoceros gracilis and Thalassiosira weissflogii when exposed to UVR

Autores
Halac, Silvana Raquel; Villafañe, Virginia Estela; Helbling, Eduardo Walter
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The aim of this study was to assess the combined effects of temperature and UVR on the photosynthesis performance of two diatoms - Chaetoceros gracilis and Thalassiosira weissflogii. In particular, we evaluated the role of UVR in inducing photoinhibition and the potential mitigation of this negative effect by an increase in temperature. Cultures were pre-acclimated at two temperatures - 18 °C and 23 °C - and exposed to different radiation treatments - UVR. +. PAR (280-700 nm); UV-A. +. PAR (315-700 nm) and PAR only (400-700 nm) under two temperatures: 18 °C (local surface summer water temperature) and 23 °C (simulating a potential increase estimated by the year 2100). Exposure to natural solar radiation resulted in UVR-induced photoinhibition that was significantly higher in T. weissflogii than in C. gracilis. Both species benefited from the higher temperature (23 °C) resulting in a lower photoinhibition as compared to samples exposed at 18 °C. Inter-specific differences were determined in regard to the heat dissipation processes (NPQ) which were higher at high temperatures, and much more evident in C. gracilis than in T. weissflogii. The analyses of inhibition and recovery rates under different irradiances indicate that the balance between negative (inhibition) and positive (repair-dissipation) effects shifted towards a more positive balance with increasing temperature. Our results highlight for a beneficial effect of temperature on photosynthesis performance during exposure to UVR, although important inter-specific differences are found, probably due to differences in cell size as well as in their distribution within the oceanic realm (i.e., coastal versus oceanic species).
Fil: Halac, Silvana Raquel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Secretaria de Ambiente y Desarrollo Sustentable de la Nación. Instituto Nacional del Agua y del Ambiente (Córdoba); Argentina. Fundación Playa Unión. Estación de Fotobiología Playa Unión; Argentina
Fil: Villafañe, Virginia Estela. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Fundación Playa Unión. Estación de Fotobiología Playa Unión; Argentina
Fil: Helbling, Eduardo Walter. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Fundación Playa Unión. Estación de Fotobiología Playa Unión; Argentina
Materia
CHAETOCEROS GRACILIS
PATAGONIA
PHOTOSYNTHESIS
TEMPERATURE
THALASSIOSIRA WEISSFLOGII
UVR
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/84636
Acceder
id CONICETDig_8352ee15f0117a9a983583fd7e482221
oai_identifier_str oai:ri.conicet.gov.ar:11336/84636
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Temperature benefits the photosynthetic performance of the diatoms Chaetoceros gracilis and Thalassiosira weissflogii when exposed to UVRHalac, Silvana RaquelVillafañe, Virginia EstelaHelbling, Eduardo WalterCHAETOCEROS GRACILISPATAGONIAPHOTOSYNTHESISTEMPERATURETHALASSIOSIRA WEISSFLOGIIUVRhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1The aim of this study was to assess the combined effects of temperature and UVR on the photosynthesis performance of two diatoms - Chaetoceros gracilis and Thalassiosira weissflogii. In particular, we evaluated the role of UVR in inducing photoinhibition and the potential mitigation of this negative effect by an increase in temperature. Cultures were pre-acclimated at two temperatures - 18 °C and 23 °C - and exposed to different radiation treatments - UVR. +. PAR (280-700 nm); UV-A. +. PAR (315-700 nm) and PAR only (400-700 nm) under two temperatures: 18 °C (local surface summer water temperature) and 23 °C (simulating a potential increase estimated by the year 2100). Exposure to natural solar radiation resulted in UVR-induced photoinhibition that was significantly higher in T. weissflogii than in C. gracilis. Both species benefited from the higher temperature (23 °C) resulting in a lower photoinhibition as compared to samples exposed at 18 °C. Inter-specific differences were determined in regard to the heat dissipation processes (NPQ) which were higher at high temperatures, and much more evident in C. gracilis than in T. weissflogii. The analyses of inhibition and recovery rates under different irradiances indicate that the balance between negative (inhibition) and positive (repair-dissipation) effects shifted towards a more positive balance with increasing temperature. Our results highlight for a beneficial effect of temperature on photosynthesis performance during exposure to UVR, although important inter-specific differences are found, probably due to differences in cell size as well as in their distribution within the oceanic realm (i.e., coastal versus oceanic species).Fil: Halac, Silvana Raquel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Secretaria de Ambiente y Desarrollo Sustentable de la Nación. Instituto Nacional del Agua y del Ambiente (Córdoba); Argentina. Fundación Playa Unión. Estación de Fotobiología Playa Unión; ArgentinaFil: Villafañe, Virginia Estela. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Fundación Playa Unión. Estación de Fotobiología Playa Unión; ArgentinaFil: Helbling, Eduardo Walter. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Fundación Playa Unión. Estación de Fotobiología Playa Unión; ArgentinaElsevier Science Sa2010-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/84636Halac, Silvana Raquel; Villafañe, Virginia Estela; Helbling, Eduardo Walter; Temperature benefits the photosynthetic performance of the diatoms Chaetoceros gracilis and Thalassiosira weissflogii when exposed to UVR; Elsevier Science Sa; Journal of Photochemistry and Photobiology B: Biology; 101; 3; 12-2010; 196-2051011-1344CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.jphotobiol.2010.07.003info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1011134410001703info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T12:18:02Zoai:ri.conicet.gov.ar:11336/84636instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-22 12:18:02.786CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Temperature benefits the photosynthetic performance of the diatoms Chaetoceros gracilis and Thalassiosira weissflogii when exposed to UVR
title Temperature benefits the photosynthetic performance of the diatoms Chaetoceros gracilis and Thalassiosira weissflogii when exposed to UVR
spellingShingle Temperature benefits the photosynthetic performance of the diatoms Chaetoceros gracilis and Thalassiosira weissflogii when exposed to UVR
Halac, Silvana Raquel
CHAETOCEROS GRACILIS
PATAGONIA
PHOTOSYNTHESIS
TEMPERATURE
THALASSIOSIRA WEISSFLOGII
UVR
title_short Temperature benefits the photosynthetic performance of the diatoms Chaetoceros gracilis and Thalassiosira weissflogii when exposed to UVR
title_full Temperature benefits the photosynthetic performance of the diatoms Chaetoceros gracilis and Thalassiosira weissflogii when exposed to UVR
title_fullStr Temperature benefits the photosynthetic performance of the diatoms Chaetoceros gracilis and Thalassiosira weissflogii when exposed to UVR
title_full_unstemmed Temperature benefits the photosynthetic performance of the diatoms Chaetoceros gracilis and Thalassiosira weissflogii when exposed to UVR
title_sort Temperature benefits the photosynthetic performance of the diatoms Chaetoceros gracilis and Thalassiosira weissflogii when exposed to UVR
dc.creator.none.fl_str_mv Halac, Silvana Raquel
Villafañe, Virginia Estela
Helbling, Eduardo Walter
author Halac, Silvana Raquel
author_facet Halac, Silvana Raquel
Villafañe, Virginia Estela
Helbling, Eduardo Walter
author_role author
author2 Villafañe, Virginia Estela
Helbling, Eduardo Walter
author2_role author
author
dc.subject.none.fl_str_mv CHAETOCEROS GRACILIS
PATAGONIA
PHOTOSYNTHESIS
TEMPERATURE
THALASSIOSIRA WEISSFLOGII
UVR
topic CHAETOCEROS GRACILIS
PATAGONIA
PHOTOSYNTHESIS
TEMPERATURE
THALASSIOSIRA WEISSFLOGII
UVR
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The aim of this study was to assess the combined effects of temperature and UVR on the photosynthesis performance of two diatoms - Chaetoceros gracilis and Thalassiosira weissflogii. In particular, we evaluated the role of UVR in inducing photoinhibition and the potential mitigation of this negative effect by an increase in temperature. Cultures were pre-acclimated at two temperatures - 18 °C and 23 °C - and exposed to different radiation treatments - UVR. +. PAR (280-700 nm); UV-A. +. PAR (315-700 nm) and PAR only (400-700 nm) under two temperatures: 18 °C (local surface summer water temperature) and 23 °C (simulating a potential increase estimated by the year 2100). Exposure to natural solar radiation resulted in UVR-induced photoinhibition that was significantly higher in T. weissflogii than in C. gracilis. Both species benefited from the higher temperature (23 °C) resulting in a lower photoinhibition as compared to samples exposed at 18 °C. Inter-specific differences were determined in regard to the heat dissipation processes (NPQ) which were higher at high temperatures, and much more evident in C. gracilis than in T. weissflogii. The analyses of inhibition and recovery rates under different irradiances indicate that the balance between negative (inhibition) and positive (repair-dissipation) effects shifted towards a more positive balance with increasing temperature. Our results highlight for a beneficial effect of temperature on photosynthesis performance during exposure to UVR, although important inter-specific differences are found, probably due to differences in cell size as well as in their distribution within the oceanic realm (i.e., coastal versus oceanic species).
Fil: Halac, Silvana Raquel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Secretaria de Ambiente y Desarrollo Sustentable de la Nación. Instituto Nacional del Agua y del Ambiente (Córdoba); Argentina. Fundación Playa Unión. Estación de Fotobiología Playa Unión; Argentina
Fil: Villafañe, Virginia Estela. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Fundación Playa Unión. Estación de Fotobiología Playa Unión; Argentina
Fil: Helbling, Eduardo Walter. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Fundación Playa Unión. Estación de Fotobiología Playa Unión; Argentina
description The aim of this study was to assess the combined effects of temperature and UVR on the photosynthesis performance of two diatoms - Chaetoceros gracilis and Thalassiosira weissflogii. In particular, we evaluated the role of UVR in inducing photoinhibition and the potential mitigation of this negative effect by an increase in temperature. Cultures were pre-acclimated at two temperatures - 18 °C and 23 °C - and exposed to different radiation treatments - UVR. +. PAR (280-700 nm); UV-A. +. PAR (315-700 nm) and PAR only (400-700 nm) under two temperatures: 18 °C (local surface summer water temperature) and 23 °C (simulating a potential increase estimated by the year 2100). Exposure to natural solar radiation resulted in UVR-induced photoinhibition that was significantly higher in T. weissflogii than in C. gracilis. Both species benefited from the higher temperature (23 °C) resulting in a lower photoinhibition as compared to samples exposed at 18 °C. Inter-specific differences were determined in regard to the heat dissipation processes (NPQ) which were higher at high temperatures, and much more evident in C. gracilis than in T. weissflogii. The analyses of inhibition and recovery rates under different irradiances indicate that the balance between negative (inhibition) and positive (repair-dissipation) effects shifted towards a more positive balance with increasing temperature. Our results highlight for a beneficial effect of temperature on photosynthesis performance during exposure to UVR, although important inter-specific differences are found, probably due to differences in cell size as well as in their distribution within the oceanic realm (i.e., coastal versus oceanic species).
publishDate 2010
dc.date.none.fl_str_mv 2010-12
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/84636
Halac, Silvana Raquel; Villafañe, Virginia Estela; Helbling, Eduardo Walter; Temperature benefits the photosynthetic performance of the diatoms Chaetoceros gracilis and Thalassiosira weissflogii when exposed to UVR; Elsevier Science Sa; Journal of Photochemistry and Photobiology B: Biology; 101; 3; 12-2010; 196-205
1011-1344
CONICET Digital
CONICET
url http://hdl.handle.net/11336/84636
identifier_str_mv Halac, Silvana Raquel; Villafañe, Virginia Estela; Helbling, Eduardo Walter; Temperature benefits the photosynthetic performance of the diatoms Chaetoceros gracilis and Thalassiosira weissflogii when exposed to UVR; Elsevier Science Sa; Journal of Photochemistry and Photobiology B: Biology; 101; 3; 12-2010; 196-205
1011-1344
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jphotobiol.2010.07.003
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1011134410001703
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science Sa
publisher.none.fl_str_mv Elsevier Science Sa
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 12.982451

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