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Abstract Detail


Evolution of Development and Physiology

Mohamed, Abeer [1], McElhinny, Elaine [2], Litt, Amy [2].

Evolution of the AP1/FUL MADS-box gene lineage and their function in flower developmentĀ .

The ABC model for flower organ identity has been well documented in Arabidopsis to work as a framework for understanding floral development. Examination of all available information regarding putative A-function gene lineages (AP1 and AP2) suggests that this function may be confined to Brassicaceae. Further, evidence suggests that the function of AP1/FUL-like genes may have changed during angiosperm evolution which suggests that functional data from Arabidopsis may not be applicable to all angiosperms. We are studying the functional evolution of the AP1/FUL MADS-box gene lineage. Although these genes play a number of roles in flower development, not enough information is known about their function outside of Arabidopsis and a few other core eudicots. Fundamental questions about the relationships of these genes and the role of conserved sequence motifs remain. To answer these questions, we are investigating the relationship of AP1 and FUL, and the evolution of gene function in these lineages, using promoter swaps and mutant constructs. The AP1/FUL, SEP and AGL6 gene lineages are grouped together to form one of the highly supported clades of MADS-box genes. Of them, only AGL6-like genes have been found in gymnosperms. However the role of AGL6 in flower development is not clear. We are carrying out a functional study of AGL6 in Arabidopsis to obtain more information on the ancestral function of these genes and their mechanism in regulating flower development.


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1 - The New York Botanical Garden (NYBG), Genomics, 2900 Southern Blvd, Bronx, NY, 10458, USA
2 - The New York Botanical Garden (NYBG), Genomics

Keywords:
MADS-box gene
gene function
ABCE floral genes
floral evolution.

Presentation Type: Plant Biology Abstract
Session: P
Location: Exhibit Hall (Northeast, Southwest & Southeast)/Hilton
Date: Sunday, July 8th, 2007
Time: 8:00 AM
Number: P27012
Abstract ID:1614


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