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PMID: 12837955 Published · ppublish English Journal Article Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S.

PIE1, an ISWI family gene, is required for FLC activation and floral repression in Arabidopsis.

The Plant cell ·Vol. 15 ·No. 7 ·2003-07-00 ·Pages 1671-82

Noh YS, Amasino RM

Abstract

Proper control of the floral transition is critical for reproductive success in flowering plants. In Arabidopsis, FLOWERING LOCUS C (FLC) is a floral repressor upon which multiple floral regulatory pathways converge. Mutations in PHOTOPERIOD-INDEPENDENT EARLY FLOWERING1 (PIE1) suppress the FLC-mediated delay of flowering as a result of the presence of FRIGIDA or of mutations in autonomous pathway genes. PIE1 is required for high levels of FLC expression in the shoot apex, but it is not required for FLC expression in roots. PIE1 is similar to ATP-dependent, chromatin-remodeling proteins of the ISWI and SWI2/SNF2 family. The role of PIE1 as an activator of FLC is consistent with the general role of ISWI and SWI2/SNF2 family genes as activators of gene expression. The pie1 mutation also causes early flowering in noninductive photoperiods independently of FLC; thus, PIE1 appears to be involved in multiple flowering pathways. PIE1 also plays a role in petal development, as revealed by the suppression of petal defects of the curly leaf mutant by the pie1 mutation.

MeSH Terms
Adenosine Triphosphatases/genetics,metabolism Amino Acid Sequence Arabidopsis/genetics,growth & development,metabolism Arabidopsis Proteins/genetics,metabolism Chromatin/metabolism Flowers/genetics,growth & development,metabolism Gene Expression Regulation, Developmental Gene Expression Regulation, Plant MADS Domain Proteins/genetics,metabolism Meristem/genetics,metabolism Molecular Sequence Data Multigene Family/genetics Mutation Phenotype Plant Shoots/genetics,metabolism RNA, Messenger/genetics,metabolism Sequence Homology, Amino Acid Time Factors Transcription Factors/genetics,metabolism
Chemicals
Arabidopsis Proteins Chromatin FLF protein, Arabidopsis ISWI protein MADS Domain Proteins PIE1 protein, Arabidopsis RNA, Messenger Transcription Factors Adenosine Triphosphatases
Authors & Affiliations
2 authors, click to expand affiliations / ORCID
Noh Yoo-Sun
Department of Biochemistry, College of Agricultural and Life Sciences, University of Wisconsin, Madison, Wisconsin 53706-1544, USA.
Amasino Richard M
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Article Info
Journal
The Plant cell
Abbr.
Plant Cell
ISSN
1040-4651
DOI
10.1105/tpc.012161
Published
2003-07-00
Pages
1671-82
Language
English
Region
England
NLM ID
9208688
PMCID
PMC165409
Subset
IM
Databases
GENBANK
AY279398
External Links
PubMed source DOI: 10.1105/tpc.012161 PMC Full Text View journal details
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