Plastid terminal oxidase (PTOX) has the potential to act as a safety valve for excess excitation energy in the alpine plant species Ranunculus glacialis L.
International audience Ranunculus glacialis leaves were tested for their plastid terminal oxidase (PTOX) content and electron flow to photorespiration and to alternative acceptors. In shade-leaves, the PTOX and NAD(P)H dehydrogenase (NDH) content were markedly lower than in sun-leaves. Carbon assimi...
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Online Access: | https://hal.archives-ouvertes.fr/hal-00789674 https://doi.org/10.1111/pce.12059 |
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ftccsdartic:oai:HAL:hal-00789674v1 2023-05-15T18:04:31+02:00 Plastid terminal oxidase (PTOX) has the potential to act as a safety valve for excess excitation energy in the alpine plant species Ranunculus glacialis L. Laureau, Constance De Paepe, Rosine Latouche, Gwendal Moreno-Chacón, Maria Finazzi, Giovanni Kuntz, Marcel Cornic, Gabriel Streb, Peter Ecologie Systématique et Evolution (ESE) Université Paris-Sud - Paris 11 (UP11)-AgroParisTech-Centre National de la Recherche Scientifique (CNRS) Institut de biotechnologie des plantes (IBP) Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS) Laboratoire de physiologie cellulaire végétale (LPCV) Université Joseph Fourier - Grenoble 1 (UJF)-Institut National de la Recherche Agronomique (INRA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS) Institut de Biosciences et de Biotechnologies de Grenoble (ex-IRTSV) (BIG) Institut National de la Santé et de la Recherche Médicale (INSERM)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Recherche Agronomique (INRA)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 ) 2013-01-10 https://hal.archives-ouvertes.fr/hal-00789674 https://doi.org/10.1111/pce.12059 en eng HAL CCSD Wiley info:eu-repo/semantics/altIdentifier/doi/10.1111/pce.12059 info:eu-repo/semantics/altIdentifier/pmid/23301628 hal-00789674 https://hal.archives-ouvertes.fr/hal-00789674 doi:10.1111/pce.12059 PRODINRA: 207008 PUBMED: 23301628 WOS: 000319875100006 ISSN: 0140-7791 EISSN: 1365-3040 Plant, Cell and Environment https://hal.archives-ouvertes.fr/hal-00789674 Plant, Cell and Environment, Wiley, 2013, 36 (7), pp.1296 - 1310. ⟨10.1111/pce.12059⟩ alternative electron flow photorespiration alpine plant Ranunculus glacialis photosynthesis carbon assimilation stress tolerance sun-leaves shade-leaves enzymatic activity plastid terminal oxidase NADPH dehydrogenase [SDV.BBM]Life Sciences [q-bio]/Biochemistry Molecular Biology info:eu-repo/semantics/article Journal articles 2013 ftccsdartic https://doi.org/10.1111/pce.12059 2021-11-28T01:25:27Z International audience Ranunculus glacialis leaves were tested for their plastid terminal oxidase (PTOX) content and electron flow to photorespiration and to alternative acceptors. In shade-leaves, the PTOX and NAD(P)H dehydrogenase (NDH) content were markedly lower than in sun-leaves. Carbon assimilation/light and C(i) response curves were not different in sun- and shade-leaves, but photosynthetic capacity was the highest in sun-leaves. Based on calculation of the apparent specificity factor of ribulose 1*5-bisphosphate carboxylase/oxygenase (Rubisco), the magnitude of alternative electron flow unrelated to carboxylation and oxygenation of Rubisco correlated to the PTOX content in sun-, shade- and growth chamber-leaves. Similarly, fluorescence induction kinetics indicated more complete and more rapid reoxidation of the plastoquinone (PQ) pool in sun- than in shade-leaves. Blocking electron flow to assimilation, photorespiration and the Mehler reaction with appropriate inhibitors showed that sun-leaves were able to maintain higher electron flow and PQ oxidation. The results suggest that PTOX can act as a safety valve in R. glacialis leaves under conditions where incident photon flux density (PFD) exceeds the growth PFD and under conditions where the plastoquinone pool is highly reduced. Such conditions can occur frequently in alpine climates due to rapid light and temperature changes. Article in Journal/Newspaper Ranunculus glacialis Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Plant, Cell & Environment 36 7 1296 1310 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
alternative electron flow photorespiration alpine plant Ranunculus glacialis photosynthesis carbon assimilation stress tolerance sun-leaves shade-leaves enzymatic activity plastid terminal oxidase NADPH dehydrogenase [SDV.BBM]Life Sciences [q-bio]/Biochemistry Molecular Biology |
spellingShingle |
alternative electron flow photorespiration alpine plant Ranunculus glacialis photosynthesis carbon assimilation stress tolerance sun-leaves shade-leaves enzymatic activity plastid terminal oxidase NADPH dehydrogenase [SDV.BBM]Life Sciences [q-bio]/Biochemistry Molecular Biology Laureau, Constance De Paepe, Rosine Latouche, Gwendal Moreno-Chacón, Maria Finazzi, Giovanni Kuntz, Marcel Cornic, Gabriel Streb, Peter Plastid terminal oxidase (PTOX) has the potential to act as a safety valve for excess excitation energy in the alpine plant species Ranunculus glacialis L. |
topic_facet |
alternative electron flow photorespiration alpine plant Ranunculus glacialis photosynthesis carbon assimilation stress tolerance sun-leaves shade-leaves enzymatic activity plastid terminal oxidase NADPH dehydrogenase [SDV.BBM]Life Sciences [q-bio]/Biochemistry Molecular Biology |
description |
International audience Ranunculus glacialis leaves were tested for their plastid terminal oxidase (PTOX) content and electron flow to photorespiration and to alternative acceptors. In shade-leaves, the PTOX and NAD(P)H dehydrogenase (NDH) content were markedly lower than in sun-leaves. Carbon assimilation/light and C(i) response curves were not different in sun- and shade-leaves, but photosynthetic capacity was the highest in sun-leaves. Based on calculation of the apparent specificity factor of ribulose 1*5-bisphosphate carboxylase/oxygenase (Rubisco), the magnitude of alternative electron flow unrelated to carboxylation and oxygenation of Rubisco correlated to the PTOX content in sun-, shade- and growth chamber-leaves. Similarly, fluorescence induction kinetics indicated more complete and more rapid reoxidation of the plastoquinone (PQ) pool in sun- than in shade-leaves. Blocking electron flow to assimilation, photorespiration and the Mehler reaction with appropriate inhibitors showed that sun-leaves were able to maintain higher electron flow and PQ oxidation. The results suggest that PTOX can act as a safety valve in R. glacialis leaves under conditions where incident photon flux density (PFD) exceeds the growth PFD and under conditions where the plastoquinone pool is highly reduced. Such conditions can occur frequently in alpine climates due to rapid light and temperature changes. |
author2 |
Ecologie Systématique et Evolution (ESE) Université Paris-Sud - Paris 11 (UP11)-AgroParisTech-Centre National de la Recherche Scientifique (CNRS) Institut de biotechnologie des plantes (IBP) Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS) Laboratoire de physiologie cellulaire végétale (LPCV) Université Joseph Fourier - Grenoble 1 (UJF)-Institut National de la Recherche Agronomique (INRA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS) Institut de Biosciences et de Biotechnologies de Grenoble (ex-IRTSV) (BIG) Institut National de la Santé et de la Recherche Médicale (INSERM)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Recherche Agronomique (INRA)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 ) |
format |
Article in Journal/Newspaper |
author |
Laureau, Constance De Paepe, Rosine Latouche, Gwendal Moreno-Chacón, Maria Finazzi, Giovanni Kuntz, Marcel Cornic, Gabriel Streb, Peter |
author_facet |
Laureau, Constance De Paepe, Rosine Latouche, Gwendal Moreno-Chacón, Maria Finazzi, Giovanni Kuntz, Marcel Cornic, Gabriel Streb, Peter |
author_sort |
Laureau, Constance |
title |
Plastid terminal oxidase (PTOX) has the potential to act as a safety valve for excess excitation energy in the alpine plant species Ranunculus glacialis L. |
title_short |
Plastid terminal oxidase (PTOX) has the potential to act as a safety valve for excess excitation energy in the alpine plant species Ranunculus glacialis L. |
title_full |
Plastid terminal oxidase (PTOX) has the potential to act as a safety valve for excess excitation energy in the alpine plant species Ranunculus glacialis L. |
title_fullStr |
Plastid terminal oxidase (PTOX) has the potential to act as a safety valve for excess excitation energy in the alpine plant species Ranunculus glacialis L. |
title_full_unstemmed |
Plastid terminal oxidase (PTOX) has the potential to act as a safety valve for excess excitation energy in the alpine plant species Ranunculus glacialis L. |
title_sort |
plastid terminal oxidase (ptox) has the potential to act as a safety valve for excess excitation energy in the alpine plant species ranunculus glacialis l. |
publisher |
HAL CCSD |
publishDate |
2013 |
url |
https://hal.archives-ouvertes.fr/hal-00789674 https://doi.org/10.1111/pce.12059 |
genre |
Ranunculus glacialis |
genre_facet |
Ranunculus glacialis |
op_source |
ISSN: 0140-7791 EISSN: 1365-3040 Plant, Cell and Environment https://hal.archives-ouvertes.fr/hal-00789674 Plant, Cell and Environment, Wiley, 2013, 36 (7), pp.1296 - 1310. ⟨10.1111/pce.12059⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1111/pce.12059 info:eu-repo/semantics/altIdentifier/pmid/23301628 hal-00789674 https://hal.archives-ouvertes.fr/hal-00789674 doi:10.1111/pce.12059 PRODINRA: 207008 PUBMED: 23301628 WOS: 000319875100006 |
op_doi |
https://doi.org/10.1111/pce.12059 |
container_title |
Plant, Cell & Environment |
container_volume |
36 |
container_issue |
7 |
container_start_page |
1296 |
op_container_end_page |
1310 |
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