Cold tolerance in Arabidopsis kamchatica

American Journal of Botany
Jessica J ArmstrongDiana E Wolf

Abstract

• Cold tolerance is a critically important factor determining how plants will be influenced by climate change, including changes in snowcover and extreme weather events. Although a great deal is known about cold tolerance in Arabidopsis thaliana, it is not highly cold tolerant. This study examined cold tolerance and its genetic diversity in an herbaceous subarctic relative, Arabidopsis kamchatica, which generally occurs in much colder climates.• Thermal analysis and electrolyte leakage were used to estimate supercooling points and lethal temperatures (LT50) in cold-acclimated and nonacclimated families from three populations of A. kamchatica.• Arabidopsis kamchatica was highly cold tolerant, with a mean LT50 of -10.8°C when actively growing, and -21.8°C when cold acclimated. It also was able to supercool to very low temperatures. Surprisingly, actively growing plants supercooled more than acclimated plants (-14.7 vs. -12.7°C). There was significant genetic variation for cold tolerance both within and among populations. However, both cold tolerance and genetic diversity were highest in the midlatitude population rather than in the far north, indicating that adaptations to climate change are most likely to arise in the center of ...Continue Reading

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Citations

Oct 17, 2017·Journal of Plant Research·Chow-Lih YewKentaro K Shimizu
Jun 25, 2018·Planta·Imke I HoermillerArnd G Heyer
Sep 27, 2018·Nature Communications·Timothy PaapeKentaro K Shimizu
Feb 26, 2020·American Journal of Botany·Jessica J ArmstrongDiana E Wolf

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