Ecological interactions affecting the evolutionof plant mating systems: Current research and future directions
Diggle, Pamela .
Architectural effects, positional segregation,and the evolution of diverse sexual systems.
Architectural effects are defined as regular, repeatable patterns of intra-individual variation in form and/or function that are due to position. Multiple studies have demonstrated that architectural effects are nearly ubiquitous among hermaphroditic flowers within inflorescences. I will review evidence for architectural effects within monoecious taxa that bear flowers of contrasting sexual function and suggest that positional variation in flower function may have provided raw material for the evolution of unisexual flowers in some lineages. This model predicts that positional segregation of flower types within the inflorescences of monoecious taxa should be pervasive. Analysis of inflorescence morphology and distribution of flower types for 52 families that include monoecious, andromonoecious, and gynomonoecious taxa support this prediction.
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1 - University of Colorado, Boulder, Department of Ecology and Evolutionary Biology, Boulder, CO, 80304, USA
Presentation Type: Symposium or Colloquium Presentation
Location: Delaware D/Hyatt
Date: Tuesday, July 10th, 2012
Time: 1:30 PM