Affiliation:
1. Department of Crop and Soil Sciences, Plant and Soil Sciences Building, Michigan State University, East Lansing, MI 48824–1325, USA.
Abstract
Many plants, including
Arabidopsis
, show increased resistance to freezing after they have been exposed to low nonfreezing temperatures. This response, termed cold acclimation, is associated with the induction of
COR
(cold-regulated) genes mediated by the C-repeat/drought-responsive element (CRT/DRE) DNA regulatory element. Increased expression of
Arabidopsis
CBF1, a transcriptional activator that binds to the CRT/DRE sequence, induced
COR
gene expression and increased the freezing tolerance of nonacclimated
Arabidopsis
plants. We conclude that CBF1 is a likely regulator of the cold acclimation response, controlling the level of
COR
gene expression, which in turn promotes tolerance to freezing.
Publisher
American Association for the Advancement of Science (AAAS)
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