How Does Diurnal and Nocturnal Warming Affect the Freezing Resistance of Antarctic Vascular Plants?
The Antarctic Peninsula has rapidly warmed up in past decades, and global warming has exhibited an asymmetric trend; therefore, it is interesting to understand whether nocturnal or diurnal warming is the most relevant for plant cold deacclimation. This study aimed to evaluate the effect of diurnal a...
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ftmdpi:oai:mdpi.com:/2223-7747/12/4/806/ 2023-08-20T04:00:52+02:00 How Does Diurnal and Nocturnal Warming Affect the Freezing Resistance of Antarctic Vascular Plants? Dariel López Carolina Sanhueza Haroldo Salvo-Garrido Luisa Bascunan-Godoy León A. Bravo agris 2023-02-10 application/pdf https://doi.org/10.3390/plants12040806 EN eng Multidisciplinary Digital Publishing Institute Plant Response to Abiotic Stress and Climate Change https://dx.doi.org/10.3390/plants12040806 https://creativecommons.org/licenses/by/4.0/ Plants; Volume 12; Issue 4; Pages: 806 asymmetric warming climate change Colobanthus quitensis Deschampsia antarctica freezing resistance night temperature supercooling Text 2023 ftmdpi https://doi.org/10.3390/plants12040806 2023-08-01T08:45:00Z The Antarctic Peninsula has rapidly warmed up in past decades, and global warming has exhibited an asymmetric trend; therefore, it is interesting to understand whether nocturnal or diurnal warming is the most relevant for plant cold deacclimation. This study aimed to evaluate the effect of diurnal and nocturnal warming on Antarctic vascular plant’s freezing resistance under laboratory conditions. This was studied by measuring the lethal temperature for 50% of tissue (LT50), ice nucleation temperature (INT), and freezing point (FP) on Deschampsia antarctica and Colobanthus quitensis plants. Additionally, soluble carbohydrates content and dehydrin levels were analyzed during nocturnal and diurnal temperatures increase. Nocturnal warming led to a 7 °C increase in the LT50 of D. antarctica and reduced dehydrin-like peptide expression. Meanwhile, C. quitensis warmed plants reduce their LT50 to about 3.6 °C. Both species reduce their sucrose content by more than 28% in warming treatments. Therefore, nocturnal warming leads to cold deacclimation in both plant species, while C. quitensis plants are also cold-deacclimated upon warm days. This suggests that even when the remaining freezing resistance of both species allows them to tolerate summer freezing events, C. quitensis can reach its boundaries of freezing vulnerability in the near future if warming in the Antarctic Peninsula progress. Text Antarc* Antarctic Antarctic Peninsula Antarctica MDPI Open Access Publishing Antarctic Antarctic Peninsula The Antarctic Plants 12 4 806 |
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MDPI Open Access Publishing |
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English |
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asymmetric warming climate change Colobanthus quitensis Deschampsia antarctica freezing resistance night temperature supercooling |
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asymmetric warming climate change Colobanthus quitensis Deschampsia antarctica freezing resistance night temperature supercooling Dariel López Carolina Sanhueza Haroldo Salvo-Garrido Luisa Bascunan-Godoy León A. Bravo How Does Diurnal and Nocturnal Warming Affect the Freezing Resistance of Antarctic Vascular Plants? |
topic_facet |
asymmetric warming climate change Colobanthus quitensis Deschampsia antarctica freezing resistance night temperature supercooling |
description |
The Antarctic Peninsula has rapidly warmed up in past decades, and global warming has exhibited an asymmetric trend; therefore, it is interesting to understand whether nocturnal or diurnal warming is the most relevant for plant cold deacclimation. This study aimed to evaluate the effect of diurnal and nocturnal warming on Antarctic vascular plant’s freezing resistance under laboratory conditions. This was studied by measuring the lethal temperature for 50% of tissue (LT50), ice nucleation temperature (INT), and freezing point (FP) on Deschampsia antarctica and Colobanthus quitensis plants. Additionally, soluble carbohydrates content and dehydrin levels were analyzed during nocturnal and diurnal temperatures increase. Nocturnal warming led to a 7 °C increase in the LT50 of D. antarctica and reduced dehydrin-like peptide expression. Meanwhile, C. quitensis warmed plants reduce their LT50 to about 3.6 °C. Both species reduce their sucrose content by more than 28% in warming treatments. Therefore, nocturnal warming leads to cold deacclimation in both plant species, while C. quitensis plants are also cold-deacclimated upon warm days. This suggests that even when the remaining freezing resistance of both species allows them to tolerate summer freezing events, C. quitensis can reach its boundaries of freezing vulnerability in the near future if warming in the Antarctic Peninsula progress. |
format |
Text |
author |
Dariel López Carolina Sanhueza Haroldo Salvo-Garrido Luisa Bascunan-Godoy León A. Bravo |
author_facet |
Dariel López Carolina Sanhueza Haroldo Salvo-Garrido Luisa Bascunan-Godoy León A. Bravo |
author_sort |
Dariel López |
title |
How Does Diurnal and Nocturnal Warming Affect the Freezing Resistance of Antarctic Vascular Plants? |
title_short |
How Does Diurnal and Nocturnal Warming Affect the Freezing Resistance of Antarctic Vascular Plants? |
title_full |
How Does Diurnal and Nocturnal Warming Affect the Freezing Resistance of Antarctic Vascular Plants? |
title_fullStr |
How Does Diurnal and Nocturnal Warming Affect the Freezing Resistance of Antarctic Vascular Plants? |
title_full_unstemmed |
How Does Diurnal and Nocturnal Warming Affect the Freezing Resistance of Antarctic Vascular Plants? |
title_sort |
how does diurnal and nocturnal warming affect the freezing resistance of antarctic vascular plants? |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2023 |
url |
https://doi.org/10.3390/plants12040806 |
op_coverage |
agris |
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; Volume 12; Issue 4; Pages: 806 |
op_relation |
Plant Response to Abiotic Stress and Climate Change https://dx.doi.org/10.3390/plants12040806 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/plants12040806 |
container_title |
Plants |
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12 |
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4 |
container_start_page |
806 |
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1774720820883488768 |