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Induction of a homeodomain-leucine zipper gene by auxin is inhibited by cytokinin in Arabidopsis roots
- Authors
- Son, O; Cho, HY; Kim, MR; Lee, H; Lee, MS; Song, E; Park, JH; Nam, KH; Chun, JY; Kim, HJ; Hong, SK; Chung, YY; Hur, CG; Cho, HT; Cheon, CI
- Issue Date
- Jan-2005
- Publisher
- ACADEMIC PRESS INC ELSEVIER SCIENCE
- Keywords
- homeobox gene; HD-Zip; auxin; cytokinin; root meristem
- Citation
- BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS, v.326, no.1, pp 203 - 209
- Pages
- 7
- Journal Title
- BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
- Volume
- 326
- Number
- 1
- Start Page
- 203
- End Page
- 209
- ISSN
- 0006-291X
1090-2104
- Abstract
- Homeobox genes are essential regulators of the development of plants as well as other organisms. We chose eight putative Arabidopsis homeobox genes not previously characterized and examined their expression in response to treatment with auxin/cytokinin. One of them, ATHB53, was further studied because it was auxin-inducible and its induction was inhibited by cytokinin. Its full length cDNA was cloned and found to encode a protein of the HD-Zip superfamily. Whole-mount in situ hybridization and RT-PCR showed that it was expressed in the root meristem, and auxin treatment increased its expression, especially in a region from 0.3 to 0.6 mm from the root tip. These results suggest that ATHB53 plays a regulatory role in auxin/cytokinin signaling during root development. (C) 2004 Elsevier Inc. All rights reserved.
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