Skip Navigation



Plant and Cell Physiology Advance Access published online on February 8, 2007
Plant and Cell Physiology, doi:10.1093/pcp/pcm023
This Article
Right arrow Advance Access manuscript (PDF)
Right arrow All Versions of this Article:
48/3/555    most recent
pcm023v1
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 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 arrowRequest Permissions
Google Scholar
Right arrow Articles by Yamauchi, Y.
Right arrow Articles by Yamaguchi, S.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Yamauchi, Y.
Right arrow Articles by Yamaguchi, S.
Agricola
Right arrow Articles by Yamauchi, Y.
Right arrow Articles by Yamaguchi, S.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

© The Author 2007. Published by Oxford University Press on behalf of Japanese Society of Plant Physiologists. All rights reserved. For Permissions, please e-mail: journals.permissions@oxfordjournals.org

Contribution of gibberellin deactivation by AtGA2ox2 to the suppression of germination of dark-imbibed Arabidopsis thaliana seeds

Yukika Yamauchi1, Noriko Takeda-Kamiya, Atsushi Hanada, Mikihiro Ogawa2, Ayuko Kuwahara3, Mitsunori Seo3, Yuji Kamiya* and Shinjiro Yamaguchi

RIKEN Plant Science Center, Suehiro-cho 1-7-22, Tsurumi-ku, Yokohama, Kanagawa 230-0045, Japan

Corresponding author Shinjiro Yamaguchi RIKEN Plant Science Center, Suehiro-cho 1-7-22, Tsurumi-ku, Yokohama, Kanagawa 230-0045, Japan E-mail: shinjiro{at}postman.riken.jp Tel. +81-45-503-9663 Fax. +81-45-503-9662


  Abstract

Gibberellin (GA) levels in imbibed Arabidopsis thaliana seeds are regulated by light via phytochrome, presumably through regulation of GA biosynthesis genes, AtGA3ox1 and AtGA3ox2, and a deactivation gene, AtGA2ox2. Here, we show that a loss-of-function ga2ox2 mutation causes an increase in GA4 levels and partly suppresses the inability of germination during dark-imbibition after inactivation of phytochrome. Experiments using 2,2-dimethylGA4, a GA4 analog resistant to GA 2-oxidase, in combination with ga2ox2 mutant seeds suggest that the efficiency of deactivation of exogenous GA4 by AtGA2ox2 is dependent on light conditions, which partly explains phytochrome-mediated changes in GA-effectiveness (sensitivity) found in previous studies.

Keywords: Arabidopsis thaliana - AtGA2ox2 - Gibberellin 2-oxidase - Gibberellin - Phytochrome - Seed germination

1Current address; National Institute of Agrobiological Sciences (NIAS), Kannondai 2-1-2, Tsukuba, Ibaraki 305-8602, Japan

2Current address; CSIRO Plant Industry, Private Mail Bag, Merbein, VIC 3505, Australia

3Current address; Laboratoire de Biologie des Semences, UMR 204 INRA-INAPG, Institut Jean-Pierre Bourgin, 78026 Versailles Cedex, France


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 Physiol.Home page
R. Yano, Y. Kanno, Y. Jikumaru, K. Nakabayashi, Y. Kamiya, and E. Nambara
CHOTTO1, a Putative Double APETALA2 Repeat Transcription Factor, Is Involved in Abscisic Acid-Mediated Repression of Gibberellin Biosynthesis during Seed Germination in Arabidopsis
Plant Physiology, October 1, 2009; 151(2): 641 - 654.
[Abstract] [Full Text] [PDF]

Home page
 Plant CellHome page
E. Oh, H. Kang, S. Yamaguchi, J. Park, D. Lee, Y. Kamiya, and G. Choi
Genome-Wide Analysis of Genes Targeted by PHYTOCHROME INTERACTING FACTOR 3-LIKE5 during Seed Germination in Arabidopsis
PLANT CELL, February 1, 2009; 21(2): 403 - 419.
[Abstract] [Full Text] [PDF]

Home page
 Plant CellHome page
S.-F. Lo, S.-Y. Yang, K.-T. Chen, Y.-I. Hsing, J. A.D. Zeevaart, L.-J. Chen, and S.-M. Yu
A Novel Class of Gibberellin 2-Oxidases Control Semidwarfism, Tillering, and Root Development in Rice
PLANT CELL, October 1, 2008; 20(10): 2603 - 2618.
[Abstract] [Full Text] [PDF]

Home page
 J Exp BotHome page
Y. Sawada, T. Katsumata, J. Kitamura, H. Kawaide, M. Nakajima, T. Asami, K. Nakaminami, T. Kurahashi, W. Mitsuhashi, Y. Inoue, et al.
Germination of photoblastic lettuce seeds is regulated via the control of endogenous physiologically active gibberellin content, rather than of gibberellin responsiveness
J. Exp. Bot., September 1, 2008; 59(12): 3383 - 3393.
[Abstract] [Full Text] [PDF]

Home page
 Plant CellHome page
I. Rieu, S. Eriksson, S. J. Powers, F. Gong, J. Griffiths, L. Woolley, R. Benlloch, O. Nilsson, S. G. Thomas, P. Hedden, et al.
Genetic Analysis Reveals That C19-GA 2-Oxidation Is a Major Gibberellin Inactivation Pathway in Arabidopsis
PLANT CELL, September 1, 2008; 20(9): 2420 - 2436.
[Abstract] [Full Text] [PDF]

Home page
 Plant CellHome page
D. H. Kim, S. Yamaguchi, S. Lim, E. Oh, J. Park, A. Hanada, Y. Kamiya, and G. Choi
SOMNUS, a CCCH-Type Zinc Finger Protein in Arabidopsis, Negatively Regulates Light-Dependent Seed Germination Downstream of PIL5
PLANT CELL, May 1, 2008; 20(5): 1260 - 1277.
[Abstract] [Full Text] [PDF]

Home page
 Mol PlantHome page
R. W. King, L. N. Mander, T. Asp, C. P. MacMillan, C. A. Blundell, and L. T. Evans
Selective Deactivation of Gibberellins below the Shoot Apex is Critical to Flowering but Not to Stem Elongation of Lolium
Mol Plant, March 1, 2008; 1(2): 295 - 307.
[Abstract] [Full Text] [PDF]

Home page
 Plant Physiol.Home page
Y. Sawada, M. Aoki, K. Nakaminami, W. Mitsuhashi, K. Tatematsu, T. Kushiro, T. Koshiba, Y. Kamiya, Y. Inoue, E. Nambara, et al.
Phytochrome- and Gibberellin-Mediated Regulation of Abscisic Acid Metabolism during Germination of Photoblastic Lettuce Seeds
Plant Physiology, March 1, 2008; 146(3): 1386 - 1396.
[Abstract] [Full Text] [PDF]

Home page
 Mol PlantHome page
P.-H. Meng, A. Macquet, O. Loudet, A. Marion-Poll, and H. M. North
Analysis of Natural Allelic Variation Controlling Arabidopsis thaliana Seed Germinability in Response to Cold and Dark: Identification of Three Major Quantitative Trait Loci
Mol Plant, January 1, 2008; 1(1): 145 - 154.
[Abstract] [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.