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United States Department of Agriculture

Agricultural Research Service

Title: Esk1 Encodes a Novel Involved in Freezing Tolerance

Authors
item Xin, Zhanguo
item Chen, Junping

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: October 20, 2003
Publication Date: February 19, 2004
Citation: Xin, Z. 2004. Esk1 encodes a novel involved in freezing tolerance[abstract]. Keystone Symposium.

Interpretive Summary: A novel gene involved in freezing was identified by positional cloning. Further molecular characterization of the gene may lead to the discovery of new mechanisms of freezing tolerance.

Technical Abstract: Many temperate plants increase freezing tolerance after exposure to a period of low nonfreezing temperatures through a process known as cold acclimation. To study the genetic mechanisms of freezing tolerance, we have isolated a series of constitutively freezing tolerant mutants. One of these mutants ESK1 displays a 5 degree Celsius improvement in freezing tolerance in the absence of cold acclimation, which accounts for over 70 percent of the total acquired freezing tolerance in fully acclimated wild-type plants. ESK1 gene was identified by positional cloning. It encodes a novel protein with no known functional domain. Cold regulation of genes in CBF-regulon in ESK1 mutants was similar to that in wild-type plants. ESK1 appears to represent new mechanism of freezing tolerance independent of CBF-regulon.

Last Modified: 8/30/2014
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