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Abstract Detail

Developmental and Structural Section

Yockteng, Roxana [1], Almeida, Ana Maria [2], Specht, Chelsea [1].

The role of SEPALLATA genes in floral evolution in the Zingiberales.

SEPALLATA genes are class E MADS-Box transcription factors that are required for the specification of all whorls of floral organs in model plants studies so far. Although there are still no functional studies in non-model plants, expression studies suggest a role of SEP genes in flower organ determination and both neo- and sub-functionalization of SEP genes have been implicated in the evolution and development of monocot floral diversity. Zingiberales is an order of tropical monocots that contains around 2500 species and show a striking diversity of floral forms. Evolution of floral morphology in the Zingiberales is mainly related to changes in the stamen and petal whorls. Here, we hypothesize that duplication of the SEP gene family, together with B andC gene family duplications, might underlie the evolution of floral form in the order through diversification of protein-protein interaction networks. Our preliminary results in the Zingiberales show that SEP genes have undergone explicit patterns of duplication events, especially in the SEP-3 clade. Expression studies thus far are in agreement with a framework in which gene duplications play a role in morphological diversification. Explicit protein-protein interaction studies are proposed to fully test our hypothesis.

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1 - University California, Berkeley, Plant and Microbial Biology, 111 Koshland Hall, Berkeley, CA, 94720, USA
2 - University of California at Berkeley, Plant and Microbial Biology, 111 Koshland Hall, Berkeley, CA, 94720-3120, US

floral development.

Presentation Type: Oral Paper:Papers for Sections
Session: 16
Location: Lindell A/Chase Park Plaza
Date: Monday, July 11th, 2011
Time: 1:45 PM
Number: 16002
Abstract ID:290

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