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Termination of Stem Cell Maintenance in Arabidopsis Floral Meristems by Interactions between WUSCHEL and AGAMOUS
- Source :
- Cell. 105:805-814
- Publication Year :
- 2001
- Publisher :
- Elsevier BV, 2001.
-
Abstract
- Floral meristems and shoot apical meristems (SAMs) are homologous, self-maintaining stem cell systems. Unlike SAMs, floral meristems are determinate, and stem cell maintenance is abolished once all floral organs are initiated. To investigate the underlying regulatory mechanisms, we analyzed the interactions between WUSCHEL (WUS), which specifies stem cell identity, and AGAMOUS (AG), which is required for floral determinacy. Our results show that repression of WUS by AG is essential for terminating the floral meristem and that WUS can induce AG expression in developing flowers. Together, this suggests that floral determinacy depends on a negative autoregulatory mechanism involving WUS and AG, which terminates stem cell maintenance.
- Subjects :
- Meristem
Arabidopsis
AGAMOUS Protein, Arabidopsis
General Biochemistry, Genetics and Molecular Biology
Gene Expression Regulation, Plant
Botany
In Situ Hybridization
reproductive and urinary physiology
Plant Proteins
Homeodomain Proteins
Regulation of gene expression
Meristem determinacy
biology
Biochemistry, Genetics and Molecular Biology(all)
Arabidopsis Proteins
Agamous
Stem Cells
fungi
food and beverages
biology.organism_classification
Cell biology
DNA-Binding Proteins
ABC model of flower development
Phenotype
Floral meristem determinacy
Stem cell
Plant Structures
Transcription Factors
Subjects
Details
- ISSN :
- 00928674
- Volume :
- 105
- Database :
- OpenAIRE
- Journal :
- Cell
- Accession number :
- edsair.doi.dedup.....610a86dab2f8a1c5905552770da31093