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ARS Home » Plains Area » Lubbock, Texas » Cropping Systems Research Laboratory » Plant Stress and Germplasm Development Research » Research » Publications at this Location » Publication #162169
Title: CHARACTERIZARION OF CONSTITUTIVELY FREEZING TOLERANT MUTANTS OF ARABIDOPSIS SUGGESTS A CRITICAL ROLE OF PROLINE IN COLD ACCLIMATION

Author
item Xin, Zhanguo
item Chen, Junping
item BROWSE, JOHN - WASHINGTON STATE UNIV

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 3/1/2004
Publication Date: 5/26/2004
Citation: Xin, Z., Chen, J., Browse, J. 2004. Characterizarion of constitutively freezing tolerant mutants of arabidopsis suggests a critical role of proline in cold acclimation [abstract]. American Society of Plant Biologists Annual Meeting. Paper No. 136.

Interpretive Summary:

Technical Abstract: Many temperate plants develop a greater ability to withstand freezing after a prior exposure to low but non-freezing temperatures through a complex adaptive process of cold acclimation. Although many changes in gene expression, metabolic processes, and morphology occur during cold acclimation, little is known about the processes that are critical for the development of freezing tolerance. To help understand these processes, we have isolated a series of Arabidopsis mutants that are constitutively freezing tolerant in the absence of cold acclimation. A previously published a mutant, eskimo1, displays increased freezing tolerance, high levels of free proline, but normal regulation of COR genes. We report here the characterization of a new mutant, eskimo2. Two independent alleles of eskimo2 were isolated; both showed increased freezing tolerance without cold acclimation and increased levels of free proline. These results indicate that proline play an important role in the development of freezing tolerance during cold acclimation.