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PMID: 12671087 Published · ppublish English Journal Article Research Support, Non-U.S. Gov't

The MADS box gene FBP2 is required for SEPALLATA function in petunia.

The Plant cell ·Vol. 15 ·No. 4 ·2003-04-00 ·Pages 914-25

Ferrario S, Immink RG, Shchennikova A, Busscher-Lange J, Angenent GC

Abstract

The ABC model, which was accepted for almost a decade as a paradigm for flower development in angiosperms, has been subjected recently to a significant modification with the introduction of the new class of E-function genes. This function is required for the proper action of the B- and C-class homeotic proteins and is provided in Arabidopsis by the SEPALLATA1/2/3 MADS box transcription factors. A triple mutant in these partially redundant genes displays homeotic conversion of petals, stamens, and carpels into sepaloid organs and loss of determinacy in the center of the flower. A similar phenotype was obtained by cosuppression of the MADS box gene FBP2 in petunia. Here, we provide evidence that this phenotype is caused by the downregulation of both FBP2 and the paralog FBP5. Functional complementation of the sepallata mutant by FBP2 and our finding that the FBP2 protein forms multimeric complexes with other floral homeotic MADS box proteins indicate that FBP2 represents the same E function as SEP3 in Arabidopsis.

MeSH Terms
Amino Acid Sequence Arabidopsis/genetics,metabolism Arabidopsis Proteins Flowers/genetics,metabolism Gene Expression Regulation, Developmental Gene Expression Regulation, Plant Genes, Homeobox/genetics,physiology Genetic Complementation Test Homeodomain Proteins/genetics,metabolism MADS Domain Proteins/genetics,metabolism Molecular Sequence Data Multigene Family/genetics Mutation Petunia/genetics,growth & development,metabolism Phenotype Phylogeny Plant Proteins/genetics,metabolism Protein Binding Protein Interaction Mapping Transcription Factors/genetics,metabolism
Chemicals
Arabidopsis Proteins Homeodomain Proteins MADS Domain Proteins Plant Proteins SEP3 protein, Arabidopsis Transcription Factors fbp2 protein, Petunia x hybrida
Authors & Affiliations
5 authors, click to expand affiliations / ORCID
Ferrario Silvia
Business Unit Plant Development and Reproduction, Plant Research International, 6700 AA Wageningen, The Netherlands.
Immink Richard G H
Shchennikova Anna
Busscher-Lange Jacqueline
Angenent Gerco C
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Article Info
Journal
The Plant cell
Abbr.
Plant Cell
ISSN
1040-4651
DOI
10.1105/tpc.010280
Published
2003-04-00
Pages
914-25
Language
English
Region
England
NLM ID
9208688
PMCID
PMC152338
Subset
IM
Databases
GENBANK
AF335234, AF335235, AF335236, AF335237, AF335238, AF335239, AF335240, AF335241, AF335242, AF335243, AF335244, AF335245
External Links
PubMed source DOI: 10.1105/tpc.010280 PMC Full Text View journal details
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