Abstract Detail
Recent Topics Posters Beecher, Jessica [1], Wolf, Diana [1], Takebayashi, Naoki [1]. Is there a latitudinal cline in cold tolerance in Arabidopsis lyrata subspecies kamchatica? Low temperature is a major factor contributing to the distribution of plant species. A correlation between the mean minimum temperature and the ability to cold acclimate has been demonstrated in Arabidopsis thaliana. Here, I tested the hypothesis that there are latitudinal differences in cold tolerance among populations of Arabidopsis lyrata subspecies kamchatica. To test this hypothesis, I compared freeze damage and looked for local adaptation in populations from 49°N and 60°N latitude. Differences in freeze damage indicate there are physiological differences and there may be local adaptation for cold tolerance between northern and southern populations. The magnitude of the physiological differences is not as great as expected based on the differences in winter air temperatures at the populations. This may be due to recent population expansion. There were no over-winter survival differences between these populations in a Fairbanks common garden. There were also no differences in super-cooling between these populations.
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1 - University of Alaska-Fairbanks, Institute of Arctic Biology, 211 Irving 1, Fairbanks, AK, 99775, USA
Keywords:
stress tolerance
freezing tolerance
cold acclimation.
Presentation Type: Recent Topics Poster
Session: P
Location: Ball Room & Party Room/SUB
Date: Monday, July 28th, 2008
Time: 12:30 PM
Number: PRT025
Abstract ID:1152 | 
