Acquisition of freezing tolerance in Arabidopsis and two contrasting ecotypes of the extremophile Eutrema salsugineum (Thellungiella salsuginea)

Copyright © 2015 Elsevier GmbH. All rights reserved.

Bibliographische Detailangaben
Veröffentlicht in:Journal of plant physiology. - 1979. - 180(2015) vom: 15. Mai, Seite 35-44
1. Verfasser: Khanal, Nityananda (VerfasserIn)
Weitere Verfasser: Moffatt, Barbara A, Gray, Gordon R
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2015
Zugriff auf das übergeordnete Werk:Journal of plant physiology
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Adaptive (phenotypic) plasticity Arabidopsis Cold acclimation Eutrema salsugineum Freezing tolerance Photosystem II Protein Complex
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245 1 0 |a Acquisition of freezing tolerance in Arabidopsis and two contrasting ecotypes of the extremophile Eutrema salsugineum (Thellungiella salsuginea) 
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520 |a Eutrema salsugineum (Thellungiella salsuginea) is an extremophile, a close relative of Arabidopsis, but possessing much higher constitutive levels of tolerance to abiotic stress. This study aimed to characterize the freezing tolerance of Arabidopsis (Columbia ecotype) and two ecotypes of Eutrema (Yukon and Shandong) isolated from contrasting geographical locations. Under our growth conditions, maximal freezing tolerance was observed after two- and three-weeks of cold acclimation for Arabidopsis and Eutrema, respectively. The ecotypes of Eutrema and Arabidopsis do not differ in their constitutive level of freezing tolerance or short-term cold acclimation capacity. However Eutrema remarkably outperforms Arabidopsis in long-term acclimation capacity suggesting a wider phenotypic plasticity for the trait of freezing tolerance. The combination of drought treatment and one-week of cold acclimation was more effective than long-term cold acclimation in achieving maximum levels of freezing tolerance in Eutrema, but not Arabidopsis. Furthermore, it was demonstrated growth conditions, particularly irradiance, are determinates of the level of freezing tolerance attained during cold acclimation suggesting a role for photosynthetic processes in adaptive stress responses 
650 4 |a Journal Article 
650 4 |a Research Support, Non-U.S. Gov't 
650 4 |a Adaptive (phenotypic) plasticity 
650 4 |a Arabidopsis 
650 4 |a Cold acclimation 
650 4 |a Eutrema salsugineum 
650 4 |a Freezing tolerance 
650 7 |a Photosystem II Protein Complex  |2 NLM 
700 1 |a Moffatt, Barbara A  |e verfasserin  |4 aut 
700 1 |a Gray, Gordon R  |e verfasserin  |4 aut 
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