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Abstract Detail


Genome, Phenome, Environment, and Evolution of Land Plants

Kramer, Elena M [1], Holappa, LD [1], Puzey, Joshua [1], Sharma, Bharti [1].

The genetic control of petal development: evidence for homology vs homoplasy.

True petals, which develop in the second whorl of the flower, are thought to have evolved many times independently. Beyond these structures, the development of petaloid features is even more diverse and can occur in any whorl of the flower as well as in extra-floral organs. We are using the genetic model Aquilegia to understand how the identity of true petals is controlled outside the core eudicots. In addition, Aquilegia has petaloid sepals which may not be controlled by the same genetic pathway that produces petaloidy in the second whorl. This work continues to focus on homologs of the ABC organ identity genes but has expanded to include AP2 family members to complement previous studies of type II MADS box genes. A combination of RNA-silencing, gene expression and protein interaction studies is providing a more complete picture of petal development and has laid the foundation for broader studies of petal homology across the Ranunculales.


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1 - Harvard University, Organismic and Evolutionary Biology, 16 Divinity Ave, Biolabs 1119, Cambridge, MA, 02138, USA

Keywords:
MADs box genes
VIGS
floral evolution
petals
Ranunculaceae.

Presentation Type: Symposium or Colloquium Presentation
Session: SY4
Location: Ballroom 2/Cliff Lodge - Level B
Date: Monday, July 27th, 2009
Time: 2:30 PM
Number: SY4004
Abstract ID:551


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