Journal Article

The <i>CKH1/EER4</i> Gene Encoding a TAF12-Like Protein Negatively Regulates Cytokinin Sensitivity in <i>Arabidopsis thaliana</i>

Minoru Kubo, Kaori Furuta, Taku Demura, Hiroo Fukuda, Yao-Guang Liu, Daisuke Shibata and Tatsuo Kakimoto

in Plant and Cell Physiology

Published on behalf of Japanese Society of Plant Physiologists

Volume 52, issue 4, pages 629-637
Published in print April 2011 | ISSN: 0032-0781
Published online February 2011 | e-ISSN: 1471-9053 | DOI: http://dx.doi.org/10.1093/pcp/pcr021
The CKH1/EER4 Gene Encoding a TAF12-Like Protein Negatively Regulates Cytokinin Sensitivity in Arabidopsis thaliana

More Like This

Show all results sharing these subjects:

  • Biochemistry
  • Molecular and Cell Biology
  • Plant Sciences and Forestry

GO

Show Summary Details

Preview

The recessive ckh1 (cytokinin hypersensitive 1) mutant of Arabidopsis thaliana shows hypersensitivity to cytokinins, which promote proliferation and greening of calli. The CKH1 gene encodes a protein resembling TAF12 (TATA BOX BINDING PROTEIN ASSOCIATED FACTOR 12), which is a component of transcription factor IID (TFIID)- and histone acetyltransferase-containing complexes in yeast and animals. Microarray analyses revealed that a substantially greater number of genes responded to a low level of cytokinins in the ckh1 mutant than in the wild type. However, expression of cytokinin primary response genes was not significantly affected by the ckh1 mutation. These results suggest that the CKH1 protein regulates a set of genes involved in late signaling processes governing a range of cytokinin responses, including cell proliferation and differentiation.

Keywords: Arabidopsis thaliana; CKH1; Cytokinin; TAF12; Transcriptional regulation

Journal Article.  4806 words.  Illustrated.

Subjects: Biochemistry ; Molecular and Cell Biology ; Plant Sciences and Forestry

Full text: subscription required

How to subscribe Recommend to my Librarian

Users without a subscription are not able to see the full content. Please, subscribe or login to access all content.