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Abstract Detail


Ranunculales - a Basal Eudicot Perspective of Angiosperm Evolution

Gleissberg, Stefan [1].

The use of Papaveraceae to understand leaf evolution.

Dissected leaves appear to be more common in eudicots than they are in basal angiosperms. Many Ranunculales have highly dissected leaves, suggesting that this trait may be ancestral for core eudicots. The study of leaf development in Ranunculales will therefore help to understand the evolution of leaves on a broad scale, by comparison of developmental pathways with various core eudicots, and with basal angiosperm and monocot taxa. Leaf morphology and development is also quite diverse within Ranunculales families, providing a model group to study morphological evolution. In this talk, I will review our past and ongoing studies on the genetic control of leaf development in Eschscholzia californica, a basal taxon within the Papaveraceae. Current problems addressed in our research are: (i) Which of the transcription factors that control leaf dissection in core eudicots are active in Eschscholzia? (ii) How has the function of KNOX gene family members diversified with regard to leaf dissection? (iii) Are shoot apical meristem regulation modules that involve phytohormones and transcription factors also found during leaf dissection? (iv) What are the entanglements between leaf polarity and leaf dissection?


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1 - Ohio University, Environmental and Plant Biology, Porter Hall, Athens, Ohio, 45701, USA

Keywords:
Leaf dissection
leaf polarity
transcription factors
phytohormones.

Presentation Type: Symposium or Colloquium Presentation
Session: SY19
Location: Stevens 2/Hilton
Date: Wednesday, July 11th, 2007
Time: 4:00 PM
Number: SY19005
Abstract ID:910


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