Plant Physiology Preview
Published on July 13, 2007; 10.1104/pp.107.102079
OPEN ACCESS ARTICLE
Received May 8, 2007
Accepted July 5, 2007
A Putative CCAAT-binding Transcription Factor Is a Regulator of Flowering Timing in Arabidopsis
Xiaoning Cai , Jenny Ballif , Saori Endo , Elizabeth Davis , Mingxiang Liang , Dong Chen , Daryll DeWald , Joel Kreps , Tong Zhu , and Yajun Wu *
Department of Plants, Soils and Climate, Center for Integrated BioSystems, Department of Biology, Utah State University, UT 84322; Syngenta Biotechnology, Inc., 3054 Cornwallis Road, Research Triangle Park, NC 27709; Diversa Corporation, 4955 Directors Place, San Diego, CA 92121
* Corresponding author; email: Yajun.wu{at}usu.edu.
Flowering at the appropriate time of year is essential for successful reproduction in plants. We found that HAP3b in Arabidopsis (Arabidopsis thaliana), a putative CCAAT-binding transcription factor gene, is involved in controlling flowering time. Over-expression of HAP3b promotes early flowering while hap3b, a null mutant of HAP3b, is delayed in flowering under a long-day photoperiod. Under short-day conditions, however, hap3b did not show a delayed flowering compared to wild-type based on the leaf number, suggesting that HAP3b may normally be involved in the photoperiod-regulated flowering pathway. Mutant hap3b plants showed earlier flowering upon gibberellic acid or vernalization treatment, which means that HAP3b is not involved in flowering promoted by GA or vernalization. Further transcript profiling and gene expression analysis suggests that HAP3b can promote flowering by enhancing expression of key flowering time genes such as FT and SOC1. Our results provide strong evidence supporting a role of HAP3b in regulating flowering in plants grown under long day conditions.
This article has been cited by other articles:
|
|
|
|
 
N. Siefers, K. K. Dang, R. W. Kumimoto, W. E. Bynum IV, G. Tayrose, and B. F. Holt III
Tissue-Specific Expression Patterns of Arabidopsis NF-Y Transcription Factors Suggest Potential for Extensive Combinatorial Complexity
Plant Physiology,
February 1, 2009;
149(2):
625 - 641.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
A. Distelfeld, G. Tranquilli, C. Li, L. Yan, and J. Dubcovsky
Genetic and Molecular Characterization of the VRN2 Loci in Tetraploid Wheat
Plant Physiology,
January 1, 2009;
149(1):
245 - 257.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
Compiled by, F. Tooke, T. Chiurugwi, and N. Battey
Flowering Newsletter bibliography for 2007
J. Exp. Bot.,
July 18, 2008;
(2008)
ern109v1.
[Full Text]
[PDF]
|
|
|
|
|
|
|
M. N. Hemming, W. J. Peacock, E. S. Dennis, and B. Trevaskis
Low-Temperature and Daylength Cues Are Integrated to Regulate FLOWERING LOCUS T in Barley
Plant Physiology,
May 1, 2008;
147(1):
355 - 366.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
M. Abe, M. Fujiwara, K.-i. Kurotani, S. Yokoi, and K. Shimamoto
Identification of Dynamin as an Interactor of Rice GIGANTEA by Tandem Affinity Purification (TAP)
Plant Cell Physiol.,
March 1, 2008;
49(3):
420 - 432.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
