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 da...
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Online Access: | https://doi.org/10.3390/plants11111520 https://doaj.org/article/0b120ae11ad146a9bb3aa6f0ec3dba27 |
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ftdoajarticles:oai:doaj.org/article:0b120ae11ad146a9bb3aa6f0ec3dba27 2023-05-15T13:52:18+02:00 Respiratory and Photosynthetic Responses of Antarctic Vascular Plants Are Differentially Affected by CO 2 Enrichment and Nocturnal Warming Carolina Sanhueza Daniela Cortes Danielle A. Way Francisca Fuentes Luisa Bascunan-Godoy Nestor Fernandez Del-Saz Patricia L. Sáez León A. Bravo Lohengrin A. Cavieres 2022-06-01T00:00:00Z https://doi.org/10.3390/plants11111520 https://doaj.org/article/0b120ae11ad146a9bb3aa6f0ec3dba27 EN eng MDPI AG https://www.mdpi.com/2223-7747/11/11/1520 https://doaj.org/toc/2223-7747 doi:10.3390/plants11111520 2223-7747 https://doaj.org/article/0b120ae11ad146a9bb3aa6f0ec3dba27 Plants, Vol 11, Iss 1520, p 1520 (2022) atmospheric CO 2 concentration nocturnal warming respiration photosynthesis foliar carbon balance Antarctic plant species Botany QK1-989 article 2022 ftdoajarticles https://doi.org/10.3390/plants11111520 2022-12-30T21:35:48Z 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. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Directory of Open Access Journals: DOAJ Articles Antarctic Antarctic Peninsula The Antarctic Plants 11 11 1520 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
atmospheric CO 2 concentration nocturnal warming respiration photosynthesis foliar carbon balance Antarctic plant species Botany QK1-989 |
spellingShingle |
atmospheric CO 2 concentration nocturnal warming respiration photosynthesis foliar carbon balance Antarctic plant species Botany QK1-989 Carolina Sanhueza Daniela Cortes Danielle A. Way Francisca Fuentes Luisa Bascunan-Godoy Nestor Fernandez Del-Saz Patricia L. Sáez León A. Bravo Lohengrin A. Cavieres Respiratory and Photosynthetic Responses of Antarctic Vascular Plants Are Differentially Affected by CO 2 Enrichment and Nocturnal Warming |
topic_facet |
atmospheric CO 2 concentration nocturnal warming respiration photosynthesis foliar carbon balance Antarctic plant species Botany QK1-989 |
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 |
Article in Journal/Newspaper |
author |
Carolina Sanhueza Daniela Cortes Danielle A. Way Francisca Fuentes Luisa Bascunan-Godoy Nestor Fernandez Del-Saz Patricia L. Sáez León A. Bravo Lohengrin A. Cavieres |
author_facet |
Carolina Sanhueza Daniela Cortes Danielle A. Way Francisca Fuentes Luisa Bascunan-Godoy Nestor Fernandez Del-Saz Patricia L. Sáez León A. Bravo Lohengrin A. Cavieres |
author_sort |
Carolina Sanhueza |
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 AG |
publishDate |
2022 |
url |
https://doi.org/10.3390/plants11111520 https://doaj.org/article/0b120ae11ad146a9bb3aa6f0ec3dba27 |
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, Vol 11, Iss 1520, p 1520 (2022) |
op_relation |
https://www.mdpi.com/2223-7747/11/11/1520 https://doaj.org/toc/2223-7747 doi:10.3390/plants11111520 2223-7747 https://doaj.org/article/0b120ae11ad146a9bb3aa6f0ec3dba27 |
op_doi |
https://doi.org/10.3390/plants11111520 |
container_title |
Plants |
container_volume |
11 |
container_issue |
11 |
container_start_page |
1520 |
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1766256582263308288 |