The MADS Box Gene FBP2 Is Required for SEPALLATA Function in Petunia
AUTOR(ES)
Ferrario, Silvia
FONTE
American Society of Plant Biologists
RESUMO
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.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=152338Documentos Relacionados
- The petunia MADS box gene FBP11 determines ovule identity.
- Toward the Analysis of the Petunia MADS Box Gene Family by Reverse and Forward Transposon Insertion Mutagenesis Approaches: B, C, and D Floral Organ Identity Functions Require SEPALLATA-Like MADS Box Genes in Petunia
- Integration of reproductive meristem fates by a SEPALLATA-like MADS-box gene
- A novel class of MADS box genes is involved in ovule development in petunia.
- The cDNA sequence of two MADS box proteins in Petunia.