How Does Diurnal and Nocturnal Warming Affect the Freezing Resistance of Antarctic Vascular Plants?
| Primer Autor |
Bravo, Leon A.
|
| Co-autores |
Lopez, Dariel
Sanhueza, Carolina
Salvo-Garrido, Haroldo
Bascunan-Godoy, Luisa
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| Título |
How Does Diurnal and Nocturnal Warming Affect the Freezing Resistance of Antarctic Vascular Plants?
|
| Editorial |
MDPI
|
| Revista |
PLANTS-BASEL
|
| Lenguaje |
en
|
| Resumen |
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 degrees 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 degrees 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.
|
| Fecha Publicación |
2023
|
| Tipo de Recurso |
artículo original
|
| doi |
10.3390/plants12040806
|
| Formato Recurso |
PDF
|
| Palabras Claves |
asymmetric warming
climate change
Colobanthus quitensis
Deschampsia antarctica
freezing resistance
night temperature
supercooling
|
| Ubicación del archivo | |
| Categoría OCDE |
Ciencias de las plantas
|
| Materias |
calentamiento asimétrico
cambio climático
Colobanthus quitensis
Deschampsia antártida
resistencia al congelamiento
temperatura nocturna
sobreenfriamiento
|
| Identificador del recurso (Mandatado-único) |
artículo original
|
| Versión del recurso (Recomendado-único) |
versión publicada
|
| License |
CC BY 4.0
|
| Condición de la licencia (Recomendado-repetible) |
CC BY 4.0
|
| Derechos de acceso |
acceso abierto
|
| Access Rights |
acceso abierto
|
| Id de Web of Science |
WOS:000940531500001
|
| Tipo de ruta |
verde# dorado
|
| Categoría WOS |
Ciencias de las plantas
|
| Referencia del Financiador (Mandatado si es aplicable-repetible) |
ANID-FONDECYT 1151173
ANID 2017-21170470
NEXER UFRO NXR17-0002
INACH RT 18-18
ANID FONDECYT 1151173
NEXER Universidad de La Frontera (UFRO) NXR17-0002
|
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