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Decrease in the Photosynthetic Performance of Temperate Grassland Species Does Not Lead to a Decline in the Gross Primary Production of the Ecosystem

Plants, under stressful conditions, can proceed to photosynthetic adjustments in order to acclimatize and alleviate the detrimental impacts on the photosynthetic apparatus. However, it is currently unclear how adjustment of photosynthetic processes under environmental constraints by plants influence...

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Autores principales: Digrado, Anthony, de la Motte, Louis G., Bachy, Aurélie, Mozaffar, Ahsan, Schoon, Niels, Bussotti, Filippo, Amelynck, Crist, Dalcq, Anne-Catherine, Fauconnier, Marie-Laure, Aubinet, Marc, Heinesch, Bernard, du Jardin, Patrick, Delaplace, Pierre
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5807415/
https://www.ncbi.nlm.nih.gov/pubmed/29459875
http://dx.doi.org/10.3389/fpls.2018.00067
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author Digrado, Anthony
de la Motte, Louis G.
Bachy, Aurélie
Mozaffar, Ahsan
Schoon, Niels
Bussotti, Filippo
Amelynck, Crist
Dalcq, Anne-Catherine
Fauconnier, Marie-Laure
Aubinet, Marc
Heinesch, Bernard
du Jardin, Patrick
Delaplace, Pierre
author_facet Digrado, Anthony
de la Motte, Louis G.
Bachy, Aurélie
Mozaffar, Ahsan
Schoon, Niels
Bussotti, Filippo
Amelynck, Crist
Dalcq, Anne-Catherine
Fauconnier, Marie-Laure
Aubinet, Marc
Heinesch, Bernard
du Jardin, Patrick
Delaplace, Pierre
author_sort Digrado, Anthony
collection PubMed
description Plants, under stressful conditions, can proceed to photosynthetic adjustments in order to acclimatize and alleviate the detrimental impacts on the photosynthetic apparatus. However, it is currently unclear how adjustment of photosynthetic processes under environmental constraints by plants influences CO(2) gas exchange at the ecosystem-scale. Over a 2-year period, photosynthetic performance of a temperate grassland ecosystem was characterized by conducting frequent chlorophyll fluorescence (ChlF) measurements on three primary grassland species (Lolium perenne L., Taraxacum sp., and Trifolium repens L.). Ecosystem photosynthetic performance was estimated from measurements performed on the three dominant grassland species weighed based on their relative abundance. In addition, monitoring CO(2) fluxes was performed by eddy covariance. The highest decrease in photosynthetic performance was detected in summer, when environmental constraints were combined. Dicot species (Taraxacum sp. and T. repens) presented the strongest capacity to up-regulate PSI and exhibited the highest electron transport efficiency under stressful environmental conditions compared with L. perenne. The decline in ecosystem photosynthetic performance did not lead to a reduction in gross primary productivity, likely because increased light energy was available under these conditions. The carbon amounts fixed at light saturation were not influenced by alterations in photosynthetic processes, suggesting photosynthesis was not impaired. Decreased photosynthetic performance was associated with high respiration flux, but both were influenced by temperature. Our study revealed variation in photosynthetic performance of a grassland ecosystem responded to environmental constraints, but alterations in photosynthetic processes appeared to exhibit a negligible influence on ecosystem CO(2) fluxes.
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spelling pubmed-58074152018-02-19 Decrease in the Photosynthetic Performance of Temperate Grassland Species Does Not Lead to a Decline in the Gross Primary Production of the Ecosystem Digrado, Anthony de la Motte, Louis G. Bachy, Aurélie Mozaffar, Ahsan Schoon, Niels Bussotti, Filippo Amelynck, Crist Dalcq, Anne-Catherine Fauconnier, Marie-Laure Aubinet, Marc Heinesch, Bernard du Jardin, Patrick Delaplace, Pierre Front Plant Sci Plant Science Plants, under stressful conditions, can proceed to photosynthetic adjustments in order to acclimatize and alleviate the detrimental impacts on the photosynthetic apparatus. However, it is currently unclear how adjustment of photosynthetic processes under environmental constraints by plants influences CO(2) gas exchange at the ecosystem-scale. Over a 2-year period, photosynthetic performance of a temperate grassland ecosystem was characterized by conducting frequent chlorophyll fluorescence (ChlF) measurements on three primary grassland species (Lolium perenne L., Taraxacum sp., and Trifolium repens L.). Ecosystem photosynthetic performance was estimated from measurements performed on the three dominant grassland species weighed based on their relative abundance. In addition, monitoring CO(2) fluxes was performed by eddy covariance. The highest decrease in photosynthetic performance was detected in summer, when environmental constraints were combined. Dicot species (Taraxacum sp. and T. repens) presented the strongest capacity to up-regulate PSI and exhibited the highest electron transport efficiency under stressful environmental conditions compared with L. perenne. The decline in ecosystem photosynthetic performance did not lead to a reduction in gross primary productivity, likely because increased light energy was available under these conditions. The carbon amounts fixed at light saturation were not influenced by alterations in photosynthetic processes, suggesting photosynthesis was not impaired. Decreased photosynthetic performance was associated with high respiration flux, but both were influenced by temperature. Our study revealed variation in photosynthetic performance of a grassland ecosystem responded to environmental constraints, but alterations in photosynthetic processes appeared to exhibit a negligible influence on ecosystem CO(2) fluxes. Frontiers Media S.A. 2018-02-05 /pmc/articles/PMC5807415/ /pubmed/29459875 http://dx.doi.org/10.3389/fpls.2018.00067 Text en Copyright © 2018 Digrado, de la Motte, Bachy, Mozaffar, Schoon, Bussotti, Amelynck, Dalcq, Fauconnier, Aubinet, Heinesch, du Jardin and Delaplace. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Plant Science
Digrado, Anthony
de la Motte, Louis G.
Bachy, Aurélie
Mozaffar, Ahsan
Schoon, Niels
Bussotti, Filippo
Amelynck, Crist
Dalcq, Anne-Catherine
Fauconnier, Marie-Laure
Aubinet, Marc
Heinesch, Bernard
du Jardin, Patrick
Delaplace, Pierre
Decrease in the Photosynthetic Performance of Temperate Grassland Species Does Not Lead to a Decline in the Gross Primary Production of the Ecosystem
title Decrease in the Photosynthetic Performance of Temperate Grassland Species Does Not Lead to a Decline in the Gross Primary Production of the Ecosystem
title_full Decrease in the Photosynthetic Performance of Temperate Grassland Species Does Not Lead to a Decline in the Gross Primary Production of the Ecosystem
title_fullStr Decrease in the Photosynthetic Performance of Temperate Grassland Species Does Not Lead to a Decline in the Gross Primary Production of the Ecosystem
title_full_unstemmed Decrease in the Photosynthetic Performance of Temperate Grassland Species Does Not Lead to a Decline in the Gross Primary Production of the Ecosystem
title_short Decrease in the Photosynthetic Performance of Temperate Grassland Species Does Not Lead to a Decline in the Gross Primary Production of the Ecosystem
title_sort decrease in the photosynthetic performance of temperate grassland species does not lead to a decline in the gross primary production of the ecosystem
topic Plant Science
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5807415/
https://www.ncbi.nlm.nih.gov/pubmed/29459875
http://dx.doi.org/10.3389/fpls.2018.00067
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