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An evolutionary perspective on the regulation of carpel development
Charlie P Scutt1, Marion Vinauger-Douard, Chloé Fourquin
1Laboratoire de Reproduction et Développement des Plantes, Unité Mixte de Recherche 5667- CNRS - INRA - ENS- Université Lyon 1 - and Institut Fédératif de Recherche 128, Ecole Normale Supérieure de Lyon, Lyon, France. Charlie.Scutt@ens-lyon.fr
Journal of Experimental Botany
|May 25, 2006
Summary
Carpel development in flowering plants has ancient origins, with key genes conserved since seed plant ancestors. Gene duplications before and after flowering plant evolution shaped carpel diversity and function.
Area of Science:
- Evolutionary Developmental Biology
- Plant Reproductive Biology
- Genomics
Background:
- The carpel, a defining feature of flowering plants (angiosperms), evolved as a novel structure enclosing ovules.
- Understanding carpel development is crucial for comprehending angiosperm evolution and reproductive success.
- Arabidopsis thaliana serves as a model system for studying carpel development.
Purpose of the Study:
- To trace the evolutionary history of genes controlling carpel development.
- To identify conserved and novel genetic mechanisms in carpel evolution across seed plants.
- To investigate the role of gene duplication in the origin and diversification of the carpel.
Main Methods:
- Comparative genomics by surveying orthologous genes in diverse seed plant taxa.
- Phylogenetic analysis to reconstruct gene evolutionary histories.
- Review of existing literature on carpel development genes in Arabidopsis thaliana and other species.
Main Results:
- Some genetic controls of female reproductive development are conserved between angiosperms and gymnosperms, dating back to the common ancestor of seed plants.
- Gene duplications in the pre-angiosperm lineage contributed novel genes for carpel origin.
- Post-angiosperm gene duplications led to sub-functionalization and neo-functionalization, generating biodiversity in carpel and fruit structures.
- Functional fluidity is observed, with non-orthologous genes controlling similar carpel development functions in different taxa.
Conclusions:
- Carpel evolution is a complex process shaped by both conserved ancestral mechanisms and lineage-specific gene innovations.
- Gene duplication has played a pivotal role in both the origin and diversification of carpel structures and functions.
- Comparative evolutionary studies are essential for understanding the genetic basis of major evolutionary innovations like the carpel.
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