Molecular biology of floral organogenesis
Summary :
Table of Contents
- Introduction.
- Floral organ-identity genes and the ABC model.
- Ectopic expression studies providing Support for the ABC Model.
- SEPALLATA genes work with ABC genes to specify organ identity.
- MADS-domain protein complexes.
- Conclusion.
Abstract
In the early 1990s, genetic studies on Arabidopsis thaliana and Antirrhinum majus led to the isolation and characterization of floral organ-identity genes (also called floral homeotic genes) and the establishment of the seminal ABC model for flower development. This model proposed that different organ-identity genes act alone and in various combinations to specify each of the four types of floral organs. Tests using ectopic expression support the basic tenets of the model. More recent work has addressed additional issues regarding floral organogenesis. What is the molecular basis for the combinatorial nature of the ABC model? The availability of important tools and resources for this model plant (together with a completely sequenced genome, large numbers of insertional mutant lines and DNA microarrays) has contributed greatly to the incredible progress made in flower development over the last several years.
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Regulation of floral organ-identity gene expression
Presentation | 11/17/2008 | en | .doc | 5 pages
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