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Developmental and Structural Section

Sanders, Heather [1], Rothwell, Gar W. [1], Wyatt, Sarah [1].

Developmental genetics, the fossil record, and the evolution of plantform.

Evolution of form proceeds through successive alterations in development that are represented by transitions in the morphology of plant organs through time. Because we understand the genetic basis of leaf morphology through expression patterns of developmental genes, we can infer the developmental basis for the successive changes evidenced by the fossil record. Systematic and paleobotanical studies suggest that the leaves of seed plants and ferns have evolved independently. However, the leaves of these two groups may have evolved through similar series of successive modifications of shared developmental pathways. Our study explores this possibility by identifying which developmental pathways are shared by ferns and seed plants and which are unique to each group.


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1 - Ohio University, Department of Environmental & Plant Biology, Porter Hall, Richland Avenue, Athens, Ohio, 45701-2979, USA

Keywords:
evolution
organography
leaf morphology
development.

Presentation Type: Oral Paper
Session: 31-1
Location: Salon A - Gov Ballroom/Hilton
Date: Tuesday, August 16th, 2005
Time: 10:15 AM
Abstract ID:69


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