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Abstract Detail


Developmental and Structural Section

Wuersig, Renate [1], Zanis, Michael [1].

Duplication and Diversification of C-class Genes Across Angiosperms.

The development and specification of floral organs and the whorls they inhabit are determined by a complex combinatorial interaction of a set of transcription factors. Many of these regulatory genes are MADS-box transcription factors that form the basis of the ABC model of floral development and are widespread throughout the tree of life.
Within the ABC model the C-class genes play crucial roles in stamen and carpel development, and genetic studies suggest that some aspects of C-class gene function appear to be broadly conserved. Nevertheless, there has been lineage specific diversification of C-class gene function due to gene duplication events.
We will present phylogenetic and molecular evolutionary analyses of C and D-class genes. We hypothesize that the independent C-class gene duplications that have occurred during the evolution of the angiosperms have been maintained by a partitioning of C-class gene function in the specification of stamen and carpel identity. To test this hypothesis, we are implementing a combination of transgenic and gene expression methodologies to perform a detailed and thorough study of C-class genes in a broad range of angiosperm lineages. These diverse lineages include higher eudicots, Ranunculales, monocots, and basal angiosperms such as Magnoliales, Laurales and Nymphaeales.


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1 - Purdue University, Botany and Plant Pathology, 915 West State Street, Purdue University, West Lafayette, IN, 47907-2054, USA

Keywords:
MADs box genes
C-class genes
Angiosperms
gene duplication.

Presentation Type: Poster:Posters for Sections
Session: P
Location: Exhibit Hall (Northeast, Southwest & Southeast)/Hilton
Date: Sunday, July 8th, 2007
Time: 8:00 AM
Number: P48005
Abstract ID:1875


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