PICKLE is a CHD3 chromatin-remodeling factor that regulates the transition from embryonic to vegetative development in Arabidopsis.
The life cycle of angiosperms is punctuated by a dormant phase that separates embryonic and postembryonic development of the sporophyte. In the pickle (pkl) mutant of Arabidopsis, embryonic traits are expressed after germination. The penetrance of the pkl phenotype is strongly enhanced by inhibitors of gibberellin biosynthesis. Map-based cloning of the PKL locus revealed that it encodes a CHD3 protein. CHD3 proteins have been implicated as chromatin-remodeling factors involved in repression of transcription. PKL is necessary for repression of LEC1, a gene implicated as a critical activator of embryo development. We propose that PKL is a component of a gibberellin-modulated developmental switch that functions during germination to prevent reexpression of the embryonic developmental state.
Ogas
J
J
Department of Biochemistry, Purdue University, West Lafayette, IN 47907-1153, USA. ogas@biochem.purdue.edu
Kaufmann
S
S
Henderson
J
J
Somerville
C
C
D017360:Arabidopsis / Q000196:embryology / Q000254:growth & development*; D029681:Arabidopsis Proteins; D001483:Base Sequence; D022762:CCAAT-Enhancer-Binding Proteins; D002843:Chromatin / Q000378:metabolism*; D003001:Cloning, Molecular; D004265:DNA Helicases; D018744:DNA, Plant; D004268:DNA-Binding Proteins / Q000235:genetics; D015870:Gene Expression; D005816:Genetic Complementation Test; D008969:Molecular Sequence Data; D016296:Mutagenesis; D010937:Plant Growth Regulators / Q000235:genetics / Q000378:metabolism*; D010940:Plant Proteins / Q000235:genetics; D018517:Plant Roots; D014157:Transcription Factors / Q000235:genetics
D029681:Arabidopsis Proteins; D022762:CCAAT-Enhancer-Binding Proteins; D002843:Chromatin; D018744:DNA, Plant; D004268:DNA-Binding Proteins; C113191:LEC1 protein, Arabidopsis; D010937:Plant Growth Regulators; D010940:Plant Proteins; D014157:Transcription Factors; C402442:AT2G25170 protein, Arabidopsis; D004265:DNA Helicases