Photosynthetic limitations in two Antarctic vascular plants: importance of leaf anatomical traits and Rubisco kinetic parameters
Particular physiological traits allow the vascular plants Deschampsia antarctica Desv. and Colobanthus quitensis (Kunth) Bartl. to inhabit Antarctica. The photosynthetic performance of these species was evaluated in situ, focusing on diffusive and biochemical constraints to CO2 assimilation. Leaf ga...
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ftcitaaragon:oai:citarea.cita-aragon.es:10532/3682 2023-05-15T13:33:11+02:00 Photosynthetic limitations in two Antarctic vascular plants: importance of leaf anatomical traits and Rubisco kinetic parameters Sáez, Patricia L. Bravo, León A. Cavieres, Lohengrin A. Vallejos, Valentina Sanhueza, Carolina Font Carrascosa, Marcel Gil Pelegrín, Eustaquio Peguero Pina, José Javier Galmés, Jeroni 2017 application/pdf http://hdl.handle.net/10532/3682 en eng https://academic.oup.com/jxb/article-lookup/doi/10.1093/jxb/erx148 10.1093/jxb/erx148 Journal Of Experimental Botany 0022-0957 http://hdl.handle.net/10532/3682 http://creativecommons.org/licenses/by-nc-sa/3.0/es/ CC-BY-NC-SA recursos forestales Anatomía de la planta Hojas Mesofilo Fotosíntesis Región antártica Journal Contribution Non-Refereed Article 2017 ftcitaaragon 2022-04-11T05:31:08Z Particular physiological traits allow the vascular plants Deschampsia antarctica Desv. and Colobanthus quitensis (Kunth) Bartl. to inhabit Antarctica. The photosynthetic performance of these species was evaluated in situ, focusing on diffusive and biochemical constraints to CO2 assimilation. Leaf gas exchange, Chl a fluorescence, leaf ultrastructure, and Rubisco catalytic properties were examined in plants growing on King George and Lagotellerie islands. In spite of the species- and population-specific effects of the measurement temperature on the main photosynthetic parameters, CO2 assimilation was highly limited by CO2 diffusion. In particular, the mesophyll conductance (gm)—estimated from both gas exchange and leaf chlorophyll fluorescence and modeled from leaf anatomy—was remarkably low, restricting CO2 diffusion and imposing the strongest constraint to CO2 acquisition. Rubisco presented a high specificity for CO2 as determined in vitro, suggesting a tight co-ordination between CO2 diffusion and leaf biochemistry that may be critical ultimately to optimize carbon balance in these species. Interestingly, both anatomical and biochemical traits resembled those described in plants from arid environments, providing a new insight into plant functional acclimation to extreme conditions. Understanding what actually limits photosynthesis in these species is important to anticipate their responses to the ongoing and predicted rapid warming in the Antarctic Peninsula Published Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Antártica Centro de Investigación y Tecnología Agroalimentaria de Aragón (CITA): citaREA Antarctic Antarctic Peninsula Lagotellerie ENVELOPE(-67.402,-67.402,-67.886,-67.886) The Antarctic |
institution |
Open Polar |
collection |
Centro de Investigación y Tecnología Agroalimentaria de Aragón (CITA): citaREA |
op_collection_id |
ftcitaaragon |
language |
English |
topic |
recursos forestales Anatomía de la planta Hojas Mesofilo Fotosíntesis Región antártica |
spellingShingle |
recursos forestales Anatomía de la planta Hojas Mesofilo Fotosíntesis Región antártica Sáez, Patricia L. Bravo, León A. Cavieres, Lohengrin A. Vallejos, Valentina Sanhueza, Carolina Font Carrascosa, Marcel Gil Pelegrín, Eustaquio Peguero Pina, José Javier Galmés, Jeroni Photosynthetic limitations in two Antarctic vascular plants: importance of leaf anatomical traits and Rubisco kinetic parameters |
topic_facet |
recursos forestales Anatomía de la planta Hojas Mesofilo Fotosíntesis Región antártica |
description |
Particular physiological traits allow the vascular plants Deschampsia antarctica Desv. and Colobanthus quitensis (Kunth) Bartl. to inhabit Antarctica. The photosynthetic performance of these species was evaluated in situ, focusing on diffusive and biochemical constraints to CO2 assimilation. Leaf gas exchange, Chl a fluorescence, leaf ultrastructure, and Rubisco catalytic properties were examined in plants growing on King George and Lagotellerie islands. In spite of the species- and population-specific effects of the measurement temperature on the main photosynthetic parameters, CO2 assimilation was highly limited by CO2 diffusion. In particular, the mesophyll conductance (gm)—estimated from both gas exchange and leaf chlorophyll fluorescence and modeled from leaf anatomy—was remarkably low, restricting CO2 diffusion and imposing the strongest constraint to CO2 acquisition. Rubisco presented a high specificity for CO2 as determined in vitro, suggesting a tight co-ordination between CO2 diffusion and leaf biochemistry that may be critical ultimately to optimize carbon balance in these species. Interestingly, both anatomical and biochemical traits resembled those described in plants from arid environments, providing a new insight into plant functional acclimation to extreme conditions. Understanding what actually limits photosynthesis in these species is important to anticipate their responses to the ongoing and predicted rapid warming in the Antarctic Peninsula Published |
format |
Article in Journal/Newspaper |
author |
Sáez, Patricia L. Bravo, León A. Cavieres, Lohengrin A. Vallejos, Valentina Sanhueza, Carolina Font Carrascosa, Marcel Gil Pelegrín, Eustaquio Peguero Pina, José Javier Galmés, Jeroni |
author_facet |
Sáez, Patricia L. Bravo, León A. Cavieres, Lohengrin A. Vallejos, Valentina Sanhueza, Carolina Font Carrascosa, Marcel Gil Pelegrín, Eustaquio Peguero Pina, José Javier Galmés, Jeroni |
author_sort |
Sáez, Patricia L. |
title |
Photosynthetic limitations in two Antarctic vascular plants: importance of leaf anatomical traits and Rubisco kinetic parameters |
title_short |
Photosynthetic limitations in two Antarctic vascular plants: importance of leaf anatomical traits and Rubisco kinetic parameters |
title_full |
Photosynthetic limitations in two Antarctic vascular plants: importance of leaf anatomical traits and Rubisco kinetic parameters |
title_fullStr |
Photosynthetic limitations in two Antarctic vascular plants: importance of leaf anatomical traits and Rubisco kinetic parameters |
title_full_unstemmed |
Photosynthetic limitations in two Antarctic vascular plants: importance of leaf anatomical traits and Rubisco kinetic parameters |
title_sort |
photosynthetic limitations in two antarctic vascular plants: importance of leaf anatomical traits and rubisco kinetic parameters |
publishDate |
2017 |
url |
http://hdl.handle.net/10532/3682 |
long_lat |
ENVELOPE(-67.402,-67.402,-67.886,-67.886) |
geographic |
Antarctic Antarctic Peninsula Lagotellerie The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Lagotellerie The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Antártica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Antártica |
op_relation |
https://academic.oup.com/jxb/article-lookup/doi/10.1093/jxb/erx148 10.1093/jxb/erx148 Journal Of Experimental Botany 0022-0957 http://hdl.handle.net/10532/3682 |
op_rights |
http://creativecommons.org/licenses/by-nc-sa/3.0/es/ |
op_rightsnorm |
CC-BY-NC-SA |
_version_ |
1766039265270038528 |