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Regulation of Flowering Time by Histone Acetylation in Arabidopsis

Yuehui He, Scott D. Michaels and Richard M. Amasino
Science
New Series, Vol. 302, No. 5651 (Dec. 5, 2003), pp. 1751-1754
Stable URL: http://www.jstor.org/stable/3835886
Page Count: 4
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Regulation of Flowering Time by Histone Acetylation in Arabidopsis
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Abstract

The Arabidopsis autonomous floral-promotion pathway promotes flowering independently of the photoperiod and vernalization pathways by repressing FLOWERING LOCUS C (FLC), a MADS-box transcription factor that blocks the transition from vegetative to reproductive development. Here, we report that FLOWERING LOCUS D (FLD), one of six genes in the autonomous pathway, encodes a plant homolog of a protein found in histone deacetylase complexes in mammals. Lesions in FLD result in hyperacetylation of histones in FLC chromatin, up-regulation of FLC expression, and extremely delayed flowering. Thus, the autonomous pathway regulates flowering in part by histone deacetylation. However, not all autonomous-pathway mutants exhibit FLC hyperacetylation, indicating that multiple means exist by which this pathway represses FLC expression.

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