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Abstract Detail


Evolutionary Developmental Biology (Evo-Devo)

Puhr, RoseMary [1], Malcomber, Simon [2].

Evolution of the YUCCA-like flavin monooxygenase SPARSE INFLORESCENCE1 lineage within flowering plants.

The phytohormone auxin is known to regulate many aspects of plant development and is essential for the growth of all lateral structures. The YUCCA family of flavin monooxygenase (FMO) genes catalyzes one of the main pathways in the production of the auxin, indole acetic acid (IAA). One YUCCA gene, SPARSE INFLORESCENCE1 (SPI1), has been shown to regulate inflorescence branching in maize, but the SPI1 ortholog in rice, OsYUC1/SPI1, is reported not to have an obvious inflorescence phenotype suggesting that SPI1 function may have diversified within the grass family. Previous phylogenetic analyses have identified a monocot specific clade of SPI1 genes, but our analysis of 182 YUCCA-like FMO genes provides weak support for a eudicot and monocot SPI1 clade that also includes the Arabidopsis YUCCA1 and YUCCA4 genes, plus the tomato and petunia FLOOZY genes. Genomic analyses will be presented to investigate evidence of conservation of gene synteny in chromosomal regions surrounding SPI1 co-orthologs, and comparative analyses of SPI1 expression in diverse plant taxa will be presented to investigate the extent of expression diversification. Together these data will provide new insights into the evolution of YUCCA genes and their possible role in driving the diversification of plant morphological form.

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1 - California State University - Long Beach, Biological Sciences, 1250 Bellflower Boulevard, Long Beach, CA, 90840, USA
2 - California State University, Long Beach, Biological Sciences, 1250 Bellflower Blvd, Long Beach, CA, 90840, United States

Keywords:
evo-devo
YUCCA genes
flavin monooxygenase (FMO)
SPARSE INFLORESCENCE1 (SPI1)
auxin
grasses
synteny
genome evolution.

Presentation Type: Poster:Posters for Topics
Session: P
Location: Hall A/Convention Center
Date: Monday, August 2nd, 2010
Time: 5:30 PM
Number: PEV004
Abstract ID:480


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