| Abstract Detail
Evolutionary Developmental Biology (Evo-Devo) Stammler, Angelika [1], Meyer, Sandra [2], Becker, Annette [1], Gleissberg, Stefan [3]. The role of class 1 KNOX genes in basal eudicot leaf development. Class 1 KNOX-like homeobox genes are important regulators of plant shoot development. Previous studies show that KNOX gene expression in Arabidopsis is essential to maintain the shoot apical meristem’s undifferentiated state allowing the meristem to grow continuously with all developmental potentialities for the meristematic cells. Additionally, KNOX genes seem to be involved in regulation of leaf dissection in some plant groups, including Eschscholzia californica (California poppy). KNOX gain-of-function phenotypes in Arabidopsis and tomato show an increased leaf dissection
In this project we aim to analyze the role of several KNOX genes (e.g. orthologs of the Arabidopsis genes STM, KNAT1,KNAT2 and KNAT6) in the regulation of leaf dissection in the closely related basal eudicots Eschscholzia and Chelidonium majus (Celandine). Both, Eschscholzia and Chelidonium show dissected leaves, but with different developmental modes and degrees of dissection. Interestingly, expression analyses show that putative orthologs of the KNOX gene STM1 seem to be involved in leaf dissection in Eschscholzia but not in Chelidonium, suggesting subfunctionalization of KNOX genes during leaf evolution. We aim to point out the evolutionary context of leaf dissection on the basis of genetics and organismic data, using gene function analysis.
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1 - University Bremen, Evolutionary Developmental Genetics Group, Leobenerstrasse UFT, Bremen, D-28359, Germany
2 - University of Mainz, Institute of Systematic Botany, Mainz, Germany
3 - Ohio University, Environmental and Plant Biology, Porter Hall, Athens, Ohio, 45701, USA
Keywords:
Leaf development
KNOX
STM
KNAT
Eschscholzia
Chelidonium
Leaf dissection.
Presentation Type: Poster:Posters for Topics
Session: P
Location: Exhibit Hall (Northeast, Southwest & Southeast)/Hilton
Date: Sunday, July 8th, 2007
Time: 8:00 AM
Number: P70001
Abstract ID:755 |
