Plant Physiology Preview
Published on December 8, 2006; 10.1104/pp.106.092320
Received October 30, 2006
Accepted November 23, 2006
Repression of the LEC1-B3 Regulatory Network in Plant Embryo Development by the VAL B3 Genes
Masaharu Suzuki *, Heidi H.-Y. Wang , and Donald R. McCarty
Plant Molecular and Cellular Biology Program, Horticultural Sciences Department, University of Florida, Gainesville, FL 32611
* Corresponding author; email: masaharu{at} ufl.edu.
Plant embryo development is regulated by a network of transcription factors that include LEAFY COTYLEDON 1 (LEC1), LEC1-LIKE (L1L); and B3 domain factors, LEAFY COTYLEDON 2 (LEC2), FUSCA3 (FUS3), and ABSCISIC ACID INSENSITIVE 3 (ABI3) of Arabidopsis thaliana. Interactions of these genes result in a temporal progression of over-lapping B3 gene expression culminating in maturation and desiccation of the seed. Three VP1/ABI3-LIKE (VAL) genes encode B3 proteins that include PHD-like and CW domains associated with chromatin factors. Whereas, the val monogenic mutants have phenotypes similar to wild type, val1 val2 double mutant seedlings form no leaves and develop embryo-like proliferations in root and apical meristem regions. In a val1 background val2 and val3 condition a dominant variegated leaf phenotype revealing a VAL function in vegetative development. Reminiscent of pickle (pkl) mutant, inhibition of gibberellin biosynthesis during germination induces embryonic phenotypes in val1 seedlings. Consistent with the embryonic seedling phenotype, LEC1, L1L, ABI3 and FUS3 are up-regulated in val1 val2 seedlings in association with a global shift in gene expression to a profile resembling late torpedo stage embryogenesis. Hence, the VAL factors function as global repressors of the LEC1-B3 gene system. The consensus binding site of the ABI3/FUS3/LEC2 B3 DNA binding domain (Sph/RY) is strongly enriched in the promoters and first introns of VAL repressed genes including the early-acting LEC1 and L1L genes. We suggest that VAL targets Sph/RY containing genes in the network for chromatin mediated repression in conjunction with the PKL-related CHD3 chromatin remodeling factors.
This article has been cited by other articles:
|
|
|
|
 
Y. Zheng, N. Ren, H. Wang, A. J. Stromberg, and S. E. Perry
Global Identification of Targets of the Arabidopsis MADS Domain Protein AGAMOUS-Like15
PLANT CELL,
September 1, 2009;
21(9):
2563 - 2577.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
H. Zhang and J. Ogas
An Epigenetic Perspective on Developmental Regulation of Seed Genes
Mol Plant,
July 1, 2009;
2(4):
610 - 627.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
A. Chiappetta, M. Fambrini, M. Petrarulo, F. Rapparini, V. Michelotti, L. Bruno, M. Greco, R. Baraldi, M. Salvini, C. Pugliesi, et al.
Ectopic expression of LEAFY COTYLEDON1-LIKE gene and localized auxin accumulation mark embryogenic competence in epiphyllous plants of Helianthus annuus x H. tuberosus
Ann. Bot.,
March 1, 2009;
103(5):
735 - 747.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
M.-J. Gao, D. J. Lydiate, X. Li, H. Lui, B. Gjetvaj, D. D. Hegedus, and K. Rozwadowski
Repression of Seed Maturation Genes by a Trihelix Transcriptional Repressor in Arabidopsis Seedlings
PLANT CELL,
January 1, 2009;
21(1):
54 - 71.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
J. Verdier and R. D. Thompson
Transcriptional Regulation of Storage Protein Synthesis During Dicotyledon Seed Filling
Plant Cell Physiol.,
September 1, 2008;
49(9):
1263 - 1271.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
H. Zhang, S. D. Rider Jr., J. T. Henderson, M. Fountain, K. Chuang, V. Kandachar, A. Simons, H. J. Edenberg, J. Romero-Severson, W. M. Muir, et al.
The CHD3 Remodeler PICKLE Promotes Trimethylation of Histone H3 Lysine 27
J. Biol. Chem.,
August 15, 2008;
283(33):
22637 - 22648.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
X. Tang, A. Hou, M. Babu, V. Nguyen, L. Hurtado, Q. Lu, J. C. Reyes, A. Wang, W. A. Keller, J. J. Harada, et al.
The Arabidopsis BRAHMA Chromatin-Remodeling ATPase Is Involved in Repression of Seed Maturation Genes in Leaves
Plant Physiology,
July 1, 2008;
147(3):
1143 - 1157.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
M. Suzuki, S. Latshaw, Y. Sato, A. M. Settles, K. E. Koch, L. C. Hannah, M. Kojima, H. Sakakibara, and D. R. McCarty
The Maize Viviparous8 Locus, Encoding a Putative ALTERED MERISTEM PROGRAM1-Like Peptidase, Regulates Abscisic Acid Accumulation and Coordinates Embryo and Endosperm Development
Plant Physiology,
March 1, 2008;
146(3):
1193 - 1206.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
M. Tanaka, A. Kikuchi, and H. Kamada
The Arabidopsis Histone Deacetylases HDA6 and HDA19 Contribute to the Repression of Embryonic Properties after Germination
Plant Physiology,
January 1, 2008;
146(1):
149 - 161.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
T. Kobayashi, Y. Ogo, R. N. Itai, H. Nakanishi, M. Takahashi, S. Mori, and N. K. Nishizawa
The transcription factor IDEF1 regulates the response to and tolerance of iron deficiency in plants
PNAS,
November 27, 2007;
104(48):
19150 - 19155.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
K. Yazawa and H. Kamada
Identification and characterization of carrot HAP factors that form a complex with the embryo-specific transcription factor C-LEC1
J. Exp. Bot.,
October 1, 2007;
58(13):
3819 - 3828.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
