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Plant and Cell Physiology Advance Access originally published online on April 11, 2006
Plant and Cell Physiology 2006 47(6):793-798; doi:10.1093/pcp/pcj047
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Short Communication

The Role of a Zinc Finger-containing Glycine-rich RNA-binding Protein During the Cold Adaptation Process in Arabidopsis thaliana

Yeon-Ok Kim and Hunseung Kang*

Department of Plant Biotechnology and Agricultural Plant Stress Research Center, College of Agriculture and Life Sciences, Chonnam National University, Gwangju, 500-757 Korea

* Corresponding author: E-mail, hskang{at}chonnam.ac.kr; Fax, +82-62-530-2047.

The mechanistic role of a glycine-rich RNA-binding protein designated atRZ-1a that contributes to enhance cold tolerance in Arabidopsis was investigated. Overexpression of atRZ-1a did not affect the expression of various cold-responsive genes such as COR6.6, COR15a, COR47, RD29A, RD29B and LTI29. Proteome analyses revealed that overexpression of atRZ-1a modulated the expression of several stress-responsive genes, and the transcript levels and RNA stability of these target genes were not affected by atRZ-1a. atRZ-1a successfully complements the cold sensitivity of Escherichia coli lacking four cold shock proteins. These results strongly suggest that atRZ-1a plays a role as an RNA chaperone during the cold adaptation process.

(Received February 21, 2006; Accepted April 4, 2006)
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