Respiratory and Photosynthetic Responses of Antarctic Vascular Plants Are Differentially Affected by CO(2) Enrichment and Nocturnal Warming
Projected rises in atmospheric CO(2) concentration and minimum night-time temperatures may have important effects on plant carbon metabolism altering the carbon balance of the only two vascular plant species in the Antarctic Peninsula. We assessed the effect of nocturnal warming (8/5 °C vs. 8/8 °C d...
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ftpubmed:oai:pubmedcentral.nih.gov:9182836 2023-05-15T13:40:23+02:00 Respiratory and Photosynthetic Responses of Antarctic Vascular Plants Are Differentially Affected by CO(2) Enrichment and Nocturnal Warming Sanhueza, Carolina Cortes, Daniela Way, Danielle A. Fuentes, Francisca Bascunan-Godoy, Luisa Fernandez Del-Saz, Nestor Sáez, Patricia L. Bravo, León A. Cavieres, Lohengrin A. 2022-06-06 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9182836/ https://doi.org/10.3390/plants11111520 en eng MDPI http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9182836/ http://dx.doi.org/10.3390/plants11111520 © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). CC-BY Plants (Basel) Article Text 2022 ftpubmed https://doi.org/10.3390/plants11111520 2022-06-12T01:11:28Z Projected rises in atmospheric CO(2) concentration and minimum night-time temperatures may have important effects on plant carbon metabolism altering the carbon balance of the only two vascular plant species in the Antarctic Peninsula. We assessed the effect of nocturnal warming (8/5 °C vs. 8/8 °C day/night) and CO(2) concentrations (400 ppm and 750 ppm) on gas exchange, non-structural carbohydrates, two respiratory-related enzymes, and mitochondrial size and number in two species of vascular plants. In Colobanthus quitensis, light-saturated photosynthesis measured at 400 ppm was reduced when plants were grown in the elevated CO(2) or in the nocturnal warming treatments. Growth in elevated CO(2) reduced stomatal conductance but nocturnal warming did not. The short-term sensitivity of respiration, relative protein abundance, and mitochondrial traits were not responsive to either treatment in this species. Moreover, some acclimation to nocturnal warming at ambient CO(2) was observed. Altogether, these responses in C. quitensis led to an increase in the respiration-assimilation ratio in plants grown in elevated CO(2). The response of Deschampsia antarctica to the experimental treatments was quite distinct. Photosynthesis was not affected by either treatment; however, respiration acclimated to temperature in the elevated CO(2) treatment. The observed short-term changes in thermal sensitivity indicate type I acclimation of respiration. Growth in elevated CO(2) and nocturnal warming resulted in a reduction in mitochondrial numbers and an increase in mitochondrial size in D. antarctica. Overall, our results suggest that with climate change D. antarctica could be more successful than C. quitensis, due to its ability to make metabolic adjustments to maintain its carbon balance. Text Antarc* Antarctic Antarctic Peninsula Antarctica PubMed Central (PMC) Antarctic Antarctic Peninsula The Antarctic Plants 11 11 1520 |
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Article Sanhueza, Carolina Cortes, Daniela Way, Danielle A. Fuentes, Francisca Bascunan-Godoy, Luisa Fernandez Del-Saz, Nestor Sáez, Patricia L. Bravo, León A. Cavieres, Lohengrin A. Respiratory and Photosynthetic Responses of Antarctic Vascular Plants Are Differentially Affected by CO(2) Enrichment and Nocturnal Warming |
topic_facet |
Article |
description |
Projected rises in atmospheric CO(2) concentration and minimum night-time temperatures may have important effects on plant carbon metabolism altering the carbon balance of the only two vascular plant species in the Antarctic Peninsula. We assessed the effect of nocturnal warming (8/5 °C vs. 8/8 °C day/night) and CO(2) concentrations (400 ppm and 750 ppm) on gas exchange, non-structural carbohydrates, two respiratory-related enzymes, and mitochondrial size and number in two species of vascular plants. In Colobanthus quitensis, light-saturated photosynthesis measured at 400 ppm was reduced when plants were grown in the elevated CO(2) or in the nocturnal warming treatments. Growth in elevated CO(2) reduced stomatal conductance but nocturnal warming did not. The short-term sensitivity of respiration, relative protein abundance, and mitochondrial traits were not responsive to either treatment in this species. Moreover, some acclimation to nocturnal warming at ambient CO(2) was observed. Altogether, these responses in C. quitensis led to an increase in the respiration-assimilation ratio in plants grown in elevated CO(2). The response of Deschampsia antarctica to the experimental treatments was quite distinct. Photosynthesis was not affected by either treatment; however, respiration acclimated to temperature in the elevated CO(2) treatment. The observed short-term changes in thermal sensitivity indicate type I acclimation of respiration. Growth in elevated CO(2) and nocturnal warming resulted in a reduction in mitochondrial numbers and an increase in mitochondrial size in D. antarctica. Overall, our results suggest that with climate change D. antarctica could be more successful than C. quitensis, due to its ability to make metabolic adjustments to maintain its carbon balance. |
format |
Text |
author |
Sanhueza, Carolina Cortes, Daniela Way, Danielle A. Fuentes, Francisca Bascunan-Godoy, Luisa Fernandez Del-Saz, Nestor Sáez, Patricia L. Bravo, León A. Cavieres, Lohengrin A. |
author_facet |
Sanhueza, Carolina Cortes, Daniela Way, Danielle A. Fuentes, Francisca Bascunan-Godoy, Luisa Fernandez Del-Saz, Nestor Sáez, Patricia L. Bravo, León A. Cavieres, Lohengrin A. |
author_sort |
Sanhueza, Carolina |
title |
Respiratory and Photosynthetic Responses of Antarctic Vascular Plants Are Differentially Affected by CO(2) Enrichment and Nocturnal Warming |
title_short |
Respiratory and Photosynthetic Responses of Antarctic Vascular Plants Are Differentially Affected by CO(2) Enrichment and Nocturnal Warming |
title_full |
Respiratory and Photosynthetic Responses of Antarctic Vascular Plants Are Differentially Affected by CO(2) Enrichment and Nocturnal Warming |
title_fullStr |
Respiratory and Photosynthetic Responses of Antarctic Vascular Plants Are Differentially Affected by CO(2) Enrichment and Nocturnal Warming |
title_full_unstemmed |
Respiratory and Photosynthetic Responses of Antarctic Vascular Plants Are Differentially Affected by CO(2) Enrichment and Nocturnal Warming |
title_sort |
respiratory and photosynthetic responses of antarctic vascular plants are differentially affected by co(2) enrichment and nocturnal warming |
publisher |
MDPI |
publishDate |
2022 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9182836/ https://doi.org/10.3390/plants11111520 |
geographic |
Antarctic Antarctic Peninsula The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica |
op_source |
Plants (Basel) |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9182836/ http://dx.doi.org/10.3390/plants11111520 |
op_rights |
© 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3390/plants11111520 |
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Plants |
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11 |
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11 |
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1520 |
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1766132947252936704 |