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Plant and Cell Physiology Advance Access originally published online on February 1, 2006
Plant and Cell Physiology 2006 47(4):554-558; doi:10.1093/pcp/pcj017
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Short Communication

Studies on Transcriptional Regulation of Endogenous Genes by ERF2 Transcription Factor in Tobacco Cells

Toshitsugu Nakano1,2, Takumi Nishiuchi3, Kaoru Suzuki1, Tatsuhito Fujimura2 and Hideaki Shinshi1,*

1 Molecular and Cellular Breeding Research Group, Institute for Biological Resources and Functions, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 6, 1-1-1 Higashi, Tsukuba, Ibaraki, 305-8566 Japan
2 Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8572 Japan
3 Division of Functional Genomics, Advanced Science Research Center, Kanazawa University, 13-1 Takaramachi, Kanazawa, 920-0934 Japan

* Corresponding author: E-mail, h.shinshi{at}aist.go.jp; Fax, +81-29-861-6090.

In this study, we showed that overexpression of ethylene-responsive transcription factor (ERF) 2 activated the expression of endogenous genes that have the GCC box in their promoter region, in tobacco plants. These include not only a defense-related gene, CHN50, encoding class I basic chitinase, but also a transcriptional repressor gene, ERF3. In tobacco plants constitutively expressing ERF2:glucocorticoid receptor fusion protein, treatment with dexamethazone induced a rapid increase of ERF3 mRNA and a slow increase of CHN50 mRNA. These results suggest that an antagonistic interplay of ERF2 and ERF3 is involved in the transcriptional regulation of the class I basic chitinase genes in tobacco.

(Received December 29, 2005; Accepted January 26, 2006)
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