Evolution of Flower Development: from Phenotypes to Genes
Preston, Jill C. , Kellogg, Elizabeth .
Conservation and divergence of APETALA1/FRUITFULL-like gene function in grasses: evidence from gene expression analyses.
In Arabidopsis, MADS-box genes APETALA1 (AP1) and FRUITFULL (FUL) play fundamental roles in floral meristem identity, sepal and petal identity, and fruit development. To examine the conservation and divergence of related genes in monocots, we analyzed the expression of recently duplicated genes FUL1 and FUL2 across phylogenetically disparate grasses. In combination with other studies, our data support a conserved and redundant role for both genes in floral meristem identity, a general role for FUL1 in floral organ identity, and a more specific role for FUL2 in outer floral whorl identity. In contrast to Arabidopsis AP1/FUL genes, expression of FUL1 and FUL2 is consistent with an early role in the morphological transition to flowering. In general FUL1 has a wider expression pattern in all spikelet organs than FUL2, but both genes are expressed throughout spikelet organs of some cereals. We hypothesize that FUL1 and FUL2 have multiple redundant functions in early inflorescence development, but may have evolved diverse roles in spikelet organ identity.
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1 - University of Missouri St Louis, Department of Biology, Research 223, 8001 Natural Bridge Road, Umsl, St Louis, Missouri, 63121, USA
Presentation Type: Symposium or Colloquium Presentation
Location: Stevens 4/Hilton
Date: Wednesday, July 11th, 2007
Time: 1:30 PM