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 (3)
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by Nakagawa, M.
Right arrow Articles by Komeda, Y.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Nakagawa, M.
Right arrow Articles by Komeda, Y.
Agricola
Right arrow Articles by Nakagawa, M.
Right arrow Articles by Komeda, Y.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

Plant and Cell Physiology, 2004, Vol. 45, No. 4 398-406
© 2004 Oxford University Press

Flowering of Arabidopsis cop1 Mutants in Darkness

Mayu Nakagawa1 and Yoshibumi Komeda1,2,3

1 Division of Biological Sciences, Graduate School of Science, Hokkaido University, N10 W8, Sapporo, 060-0810 Japan
2 Department of Biological Sciences, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033 Japan

To elucidate the role of the COP1 gene in flowering, we analyzed flowering of cop1 mutant lines in darkness. When grown in the presence of 1% (w/v) sucrose, the cop1-6 mutant flowered in darkness, but cop1-1 and cop1-4 did not. However, cop1-1 and cop1-4 flowered in darkness when grown in the presence of 5% (w/v) sucrose. Therefore, the COP1 gene represses not only photomorphogenesis in seedlings but also flowering in darkness. Comparison of mRNAs levels of floral identity genes in cop1-6 and wild-type plants grown in darkness revealed increased mRNA levels of genes that act downstream of CO and reduced FLC mRNA level in cop1-6. Double mutants of cop1-6 and each of the late-flowering mutations cry2-1, gi-2, co-1, and ld-1 flowered in darkness. All of the double mutants except cry2-1 cop1-6 flowered later than cop1-6, demonstrating that cop1-6 is epistatic to cry2-1 for early flowering. The ld-1 cop1-6 double mutant flowered much earlier than the ld-1 mutant. The delay in flowering in the double mutants was not strongly influenced by the light conditions, whereas that of the gi-2 cop1-6 double mutant was reduced in darkness.

3 Corresponding author: E-mail: komeda-y{at}biol.s.u-tokyo.ac.jp; Fax: +81-3-5841-4454.


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 CellHome page
M. Endo, N. Mochizuki, T. Suzuki, and A. Nagatani
CRYPTOCHROME2 in Vascular Bundles Regulates Flowering in Arabidopsis
PLANT CELL, January 1, 2007; 19(1): 84 - 93.
[Abstract] [Full Text] [PDF]

Home page
 DevelopmentHome page
S. Laubinger, V. Marchal, J. Gentilhomme, S. Wenkel, J. Adrian, S. Jang, C. Kulajta, H. Braun, G. Coupland, and U. Hoecker
Arabidopsis SPA proteins regulate photoperiodic flowering and interact with the floral inducer CONSTANS to regulate its stability
Development, August 15, 2006; 133(16): 3213 - 3222.
[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.