PCP Award<br>Arabidopsis <I>TERMINAL FLOWER2</I>, a Heterochromatin Protein 1 homolog, regulates flowering time.

DOI

Bibliographic Information

Other Title
  • 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

Details 詳細情報について

  • CRID
    1390282680604627840
  • NII Article ID
    130006988239
  • DOI
    10.14841/jspp.2005.0.a4.0
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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