In situ warming in the Antarctic: effects on growth and photosynthesis in Antarctic vascular plants
Summary The Antarctic Peninsula has experienced a rapid warming in the last decades. Although recent climatic evidence supports a new tendency towards stabilization of temperatures, the impacts on the biosphere, and specifically on Antarctic plant species, remain unclear. We evaluated the in situ wa...
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crwiley:10.1111/nph.15124 2024-09-15T17:46:37+00:00 In situ warming in the Antarctic: effects on growth and photosynthesis in Antarctic vascular plants Sáez, Patricia L. Cavieres, Lohengrin A. Galmés, Jeroni Gil‐Pelegrín, Eustaquio Peguero‐Pina, José Javier Sancho‐Knapik, Domingo Vivas, Mercedes Sanhueza, Carolina Ramírez, Constanza F. Rivera, Betsy K. Corcuera, Luis J. Bravo, León A. Fondo Nacional de Desarrollo Científico y Tecnológico Comisión Nacional de Investigación Científica y Tecnológica 2018 http://dx.doi.org/10.1111/nph.15124 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fnph.15124 https://nph.onlinelibrary.wiley.com/doi/pdf/10.1111/nph.15124 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor New Phytologist volume 218, issue 4, page 1406-1418 ISSN 0028-646X 1469-8137 journal-article 2018 crwiley https://doi.org/10.1111/nph.15124 2024-09-05T05:10:32Z Summary The Antarctic Peninsula has experienced a rapid warming in the last decades. Although recent climatic evidence supports a new tendency towards stabilization of temperatures, the impacts on the biosphere, and specifically on Antarctic plant species, remain unclear. We evaluated the in situ warming effects on photosynthesis, including the underlying diffusive, biochemical and anatomical determinants, and the relative growth of two Antarctic vascular species, Colobanthus quitensis and Deschampsia antarctica , using open top chambers ( OTCs ) and gas exchange measurements in the field. In C. quitensis , the photosynthetic response to warming relied on specific adjustments in the anatomical determinants of the leaf CO 2 transfer, which enhanced mesophyll conductance and photosynthetic assimilation, thereby promoting higher leaf carbon gain and plant growth. These changes were accompanied by alterations in the leaf chemical composition. By contrast, D. antarctica showed no response to warming, with a lack of significant differences between plants grown inside OTC s and plants grown in the open field. Overall, the present results are the first reporting a contrasting effect of in situ warming on photosynthesis and its underlying determinants, of the two unique Antarctic vascular plant species, which could have direct consequences on their ecological success under future climate conditions. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Wiley Online Library New Phytologist 218 4 1406 1418 |
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English |
description |
Summary The Antarctic Peninsula has experienced a rapid warming in the last decades. Although recent climatic evidence supports a new tendency towards stabilization of temperatures, the impacts on the biosphere, and specifically on Antarctic plant species, remain unclear. We evaluated the in situ warming effects on photosynthesis, including the underlying diffusive, biochemical and anatomical determinants, and the relative growth of two Antarctic vascular species, Colobanthus quitensis and Deschampsia antarctica , using open top chambers ( OTCs ) and gas exchange measurements in the field. In C. quitensis , the photosynthetic response to warming relied on specific adjustments in the anatomical determinants of the leaf CO 2 transfer, which enhanced mesophyll conductance and photosynthetic assimilation, thereby promoting higher leaf carbon gain and plant growth. These changes were accompanied by alterations in the leaf chemical composition. By contrast, D. antarctica showed no response to warming, with a lack of significant differences between plants grown inside OTC s and plants grown in the open field. Overall, the present results are the first reporting a contrasting effect of in situ warming on photosynthesis and its underlying determinants, of the two unique Antarctic vascular plant species, which could have direct consequences on their ecological success under future climate conditions. |
author2 |
Fondo Nacional de Desarrollo Científico y Tecnológico Comisión Nacional de Investigación Científica y Tecnológica |
format |
Article in Journal/Newspaper |
author |
Sáez, Patricia L. Cavieres, Lohengrin A. Galmés, Jeroni Gil‐Pelegrín, Eustaquio Peguero‐Pina, José Javier Sancho‐Knapik, Domingo Vivas, Mercedes Sanhueza, Carolina Ramírez, Constanza F. Rivera, Betsy K. Corcuera, Luis J. Bravo, León A. |
spellingShingle |
Sáez, Patricia L. Cavieres, Lohengrin A. Galmés, Jeroni Gil‐Pelegrín, Eustaquio Peguero‐Pina, José Javier Sancho‐Knapik, Domingo Vivas, Mercedes Sanhueza, Carolina Ramírez, Constanza F. Rivera, Betsy K. Corcuera, Luis J. Bravo, León A. In situ warming in the Antarctic: effects on growth and photosynthesis in Antarctic vascular plants |
author_facet |
Sáez, Patricia L. Cavieres, Lohengrin A. Galmés, Jeroni Gil‐Pelegrín, Eustaquio Peguero‐Pina, José Javier Sancho‐Knapik, Domingo Vivas, Mercedes Sanhueza, Carolina Ramírez, Constanza F. Rivera, Betsy K. Corcuera, Luis J. Bravo, León A. |
author_sort |
Sáez, Patricia L. |
title |
In situ warming in the Antarctic: effects on growth and photosynthesis in Antarctic vascular plants |
title_short |
In situ warming in the Antarctic: effects on growth and photosynthesis in Antarctic vascular plants |
title_full |
In situ warming in the Antarctic: effects on growth and photosynthesis in Antarctic vascular plants |
title_fullStr |
In situ warming in the Antarctic: effects on growth and photosynthesis in Antarctic vascular plants |
title_full_unstemmed |
In situ warming in the Antarctic: effects on growth and photosynthesis in Antarctic vascular plants |
title_sort |
in situ warming in the antarctic: effects on growth and photosynthesis in antarctic vascular plants |
publisher |
Wiley |
publishDate |
2018 |
url |
http://dx.doi.org/10.1111/nph.15124 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fnph.15124 https://nph.onlinelibrary.wiley.com/doi/pdf/10.1111/nph.15124 |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica |
op_source |
New Phytologist volume 218, issue 4, page 1406-1418 ISSN 0028-646X 1469-8137 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/nph.15124 |
container_title |
New Phytologist |
container_volume |
218 |
container_issue |
4 |
container_start_page |
1406 |
op_container_end_page |
1418 |
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1810494891148443648 |