Skip Navigation

This Article
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in ISI Web of Science
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrow Search for citing articles in:
ISI Web of Science (44)
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by Suzuki, T.
Right arrow Articles by Mizuno, T.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Suzuki, T.
Right arrow Articles by Mizuno, T.
Agricola
Right arrow Articles by Suzuki, T.
Right arrow Articles by Mizuno, T.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

Plant and Cell Physiology, 2002, Vol. 43, No. 1 123-129
© 2002 Oxford University Press

Short Communications

An Arabidopsis Histidine-Containing Phosphotransfer (HPt) Factor Implicated in Phosphorelay Signal Transduction: Overexpression of AHP2 in Plants Results in Hypersensitiveness to Cytokinin

Tomomi Suzuki, Kuniko Ishikawa, Takafumi Yamashino and Takeshi Mizuno1

Laboratory of Molecular Microbiology, School of Agriculture, Nagoya University, Chikusa-ku, Nagoya, 464-8601 Japan

Abstract

Histidine-containing phosphotransfer (HPt) factors from Arabidopsis thaliana, designated as AHPs, function most likely in concert with histidine (His)-kinases (HKs) and response regulators (RRs) in certain multistep histidine (His)->aspartate (Asp) phosphorelays that are involved in the signal transduction mechanisms, by which plant cells appear to respond to certain hormonal stimuli, including cytokinin. Although some previous in vitro results from studies on Arabidopsis AHPs (AHP1 to AHP5) supported this hypothesis, it has not yet been proven. To this end, here we constructed transgenic plants that contained the AHP2 protein in a considerably higher amount than in wild-type plants. Such AHP2-overexpressing young seedlings were examined in comparison with wild-type plants, with special reference to hormone responses; particularly, their inhibitory effects on root elongation of plants grown on agar-plates, and also hypocotyl elongation of etiolated seedlings grown in the dark. The results of this study suggested that AHP2-overexpressing plants showed a characteristic phenotype of cytokinin-hypersensitive. These in vivo observations were best interpreted by assuming that the AHP factor(s) is somehow implicated, if not directly, in a cytokinin-mediated His->Asp phosphorelay signaling in Arabidopsis.

Footnotes

1 Corresponding author: E-mail, tmizuno@agr.nagoya-u.ac.jp; Fax, +81-52-789-4089.


Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?


This article has been cited by other articles:


Home page
 Plant Cell PhysiolHome page
M. Taniguchi, N. Sasaki, T. Tsuge, T. Aoyama, and A. Oka
ARR1 Directly Activates Cytokinin Response Genes that Encode Proteins with Diverse Regulatory Functions
Plant Cell Physiol., February 1, 2007; 48(2): 263 - 277.
[Abstract] [Full Text] [PDF]

Home page
 Plant Cell PhysiolHome page
A. Iwama, T. Yamashino, Y. Tanaka, H. Sakakibara, T. Kakimoto, S. Sato, T. Kato, S. Tabata, A. Nagatani, and T. Mizuno
AHK5 Histidine Kinase Regulates Root Elongation Through an ETR1-Dependent Abscisic Acid and Ethylene Signaling Pathway in Arabidopsis thaliana
Plant Cell Physiol., February 1, 2007; 48(2): 375 - 380.
[Abstract] [Full Text] [PDF]

Home page
 Plant Cell PhysiolHome page
A. Yokoyama, T. Yamashino, Y.-I. Amano, Y. Tajima, A. Imamura, H. Sakakibara, and T. Mizuno
Type-B ARR Transcription Factors, ARR10 and ARR12, are Implicated in Cytokinin-Mediated Regulation of Protoxylem Differentiation in Roots of Arabidopsis thaliana
Plant Cell Physiol., January 1, 2007; 48(1): 84 - 96.
[Abstract] [Full Text] [PDF]

Home page
 Plant CellHome page
C. E. Hutchison, J. Li, C. Argueso, M. Gonzalez, E. Lee, M. W. Lewis, B. B. Maxwell, T. D. Perdue, G. E. Schaller, J. M. Alonso, et al.
The Arabidopsis Histidine Phosphotransfer Proteins Are Redundant Positive Regulators of Cytokinin Signaling
PLANT CELL, November 1, 2006; 18(11): 3073 - 3087.
[Abstract] [Full Text] [PDF]

Home page
 Plant Physiol.Home page
P. Che, S. Lall, D. Nettleton, and S. H. Howell
Gene Expression Programs during Shoot, Root, and Callus Development in Arabidopsis Tissue Culture
Plant Physiology, June 1, 2006; 141(2): 620 - 637.
[Abstract] [Full Text] [PDF]

Home page
 Plant Physiol.Home page
M. S. Pischke, E. L. Huttlin, A. D. Hegeman, and M. R. Sussman
A Transcriptome-Based Characterization of Habituation in Plant Tissue Culture
Plant Physiology, April 1, 2006; 140(4): 1255 - 1278.
[Abstract] [Full Text] [PDF]

Home page
 Plant Cell PhysiolHome page
T. Mizuno and N. Nakamichi
Pseudo-Response Regulators (PRRs) or True Oscillator Components (TOCs)
Plant Cell Physiol., May 1, 2005; 46(5): 677 - 685.
[Abstract] [Full Text] [PDF]

Home page
 Plant Cell PhysiolHome page
T. Kiba, T. Naitou, N. Koizumi, T. Yamashino, H. Sakakibara, and T. Mizuno
Combinatorial Microarray Analysis Revealing Arabidopsis Genes Implicated in Cytokinin Responses through the His->Asp Phosphorelay Circuitry
Plant Cell Physiol., February 1, 2005; 46(2): 339 - 355.
[Abstract] [Full Text] [PDF]

Home page
 Plant Cell PhysiolHome page
T. Kiba, K. Aoki, H. Sakakibara, and T. Mizuno
Arabidopsis Response Regulator, ARR22, Ectopic Expression of Which Results in Phenotypes Similar to the wol Cytokinin-Receptor Mutant
Plant Cell Physiol., August 15, 2004; 45(8): 1063 - 1077.
[Abstract] [Full Text] [PDF]

Home page
 Proc. Natl. Acad. Sci. USAHome page
M. Higuchi, M. S. Pischke, A. P. Mahonen, K. Miyawaki, Y. Hashimoto, M. Seki, M. Kobayashi, K. Shinozaki, T. Kato, S. Tabata, et al.
In planta functions of the Arabidopsis cytokinin receptor family
PNAS, June 8, 2004; 101(23): 8821 - 8826.
[Abstract] [Full Text] [PDF]

Home page
 Plant Cell PhysiolHome page
T. Kiba, H. Yamada, S. Sato, T. Kato, S. Tabata, T. Yamashino, and T. Mizuno
The Type-A Response Regulator, ARR15, Acts as a Negative Regulator in the Cytokinin-Mediated Signal Transduction in Arabidopsis thaliana
Plant Cell Physiol., August 15, 2003; 44(8): 868 - 874.
[Abstract] [Full Text] [PDF]

Home page
 Plant Cell PhysiolHome page
A. Imamura, T. Kiba, Y. Tajima, T. Yamashino, and T. Mizuno
In Vivo and In Vitro Characterization of the ARR11 Response Regulator Implicated in the His-to-Asp Phosphorelay Signal Transduction in Arabidopsis thaliana
Plant Cell Physiol., February 15, 2003; 44(2): 122 - 131.
[Abstract] [Full Text] [PDF]

Home page
 Plant Physiol.Home page
J. Sun, Q.-W. Niu, P. Tarkowski, B. Zheng, D. Tarkowska, G. Sandberg, N.-H. Chua, and J. Zuo
The Arabidopsis AtIPT8/PGA22 Gene Encodes an Isopentenyl Transferase That Is Involved in De Novo Cytokinin Biosynthesis
Plant Physiology, January 1, 2003; 131(1): 167 - 176.
[Abstract] [Full Text] [PDF]

Home page
 Proc. Natl. Acad. Sci. USAHome page
M. S. Pischke, L. G. Jones, D. Otsuga, D. E. Fernandez, G. N. Drews, and M. R. Sussman
An Arabidopsis histidine kinase is essential for megagametogenesis
PNAS, November 26, 2002; 99(24): 15800 - 15805.
[Abstract] [Full Text] [PDF]

Home page
 Plant CellHome page
K. Hosoda, A. Imamura, E. Katoh, T. Hatta, M. Tachiki, H. Yamada, T. Mizuno, and T. Yamazaki
Molecular Structure of the GARP Family of Plant Myb-Related DNA Binding Motifs of the Arabidopsis Response Regulators
PLANT CELL, September 1, 2002; 14(9): 2015 - 2029.
[Abstract] [Full Text] [PDF]

Home page
 Plant Physiol.Home page
I. Hwang, H.-C. Chen, and J. Sheen
Two-Component Signal Transduction Pathways in Arabidopsis
Plant Physiology, June 1, 2002; 129(2): 500 - 515.
[Abstract] [Full Text] [PDF]

Home page
 Plant CellHome page
C. E. Hutchison and J. J. Kieber
Cytokinin Signaling in Arabidopsis
PLANT CELL, May 1, 2002; 14(90001): S47 - 59.
[Full Text] [PDF]


Disclaimer:
Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.