PCP Award<br>Arabidopsis <I>TERMINAL FLOWER2</I>, a Heterochromatin Protein 1 homolog, regulates flowering time.
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- Kotake Toshihisa
- Research Inst. Biological Sciences, Okayama Saitama Univ.
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- Takada Shinobu
- Research Inst. Biological Sciences, Okayama Univ. Tubingen
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- Nakahigashi Kenji
- Research Inst. Biological Sciences, Okayama CREST, JST
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- Masaaki Ohto
- Univ. California, Davis
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- Goto Koji
- Research Inst. Biological Sciences, Okayama CREST, JST
Bibliographic Information
- Other Title
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- 日本植物生理学会論文賞<br><I>TFL2</I>による花成およびヘテロクロマチン制御の研究
Abstract
Arabidopsis terminal flower2 (tfl2) mutants show photoperiod insensitive early-flowering phenotype, as well as several other pleiotropic phenotypes. We found that the early flowering of tfl2 is caused mainly by ectopic expression of the FT gene, a floral pathway integrator and that TFL2 competitively counteracts the activity of CO, an FT activator to repress ectopic FT expression. Molecular cloning of TFL2 showed that it encodes a Heterochromatin Protein 1 (HP1) homolog. Gene expression analyses using DNA microarrays, however, did not show an increase in the expression of heterochromatin genes in tfl2 mutants but instead showed the upregulation of the several floral homeotic genes. This multiple genes repression by TFL2 causes the pleiotropic phenotype of the tfl2 mutant. Our results demonstrate that despite its homology to HP1, TFL2 is involved in the repression of specific euchromatin genes and not heterochromatin genes in Arabidopsis.
Journal
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- Plant and Cell Physiology Supplement
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Plant and Cell Physiology Supplement 2005 (0), A4-A4, 2005
The Japanese Society of Plant Physiologists
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Details 詳細情報について
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- CRID
- 1390282680604627840
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- NII Article ID
- 130006988239
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- Data Source
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- JaLC
- CiNii Articles
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- Abstract License Flag
- Disallowed