Induction of a homeodomain-leucine zipper gene by auxin is inhibited by cytokinin in Arabidopsis roots

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Title
Induction of a homeodomain-leucine zipper gene by auxin is inhibited by cytokinin in Arabidopsis roots
Author(s)
O Son; H Y Cho; M R Kim; H Lee; M S Lee; E Song; J H Park; K H Nam; J Y Chun; H J Kim; S K Hong; Y Y Chung; Cheol-Goo Hur; H T Cho; C I Cheon
Bibliographic Citation
Biochemical and Biophysical Research Communications, vol. 326, no. 1, pp. 203-209
Publication Year
2005
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.
Keyword
AuxinCytokininHD-ZipHomeobox geneRoot meristem
ISSN
0006-291X
Publisher
Elsevier
DOI
http://dx.doi.org/10.1016/j.bbrc.2004.11.014
Type
Article
Appears in Collections:
1. Journal Articles > Journal Articles
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