Abstract Detail

Developmental and Structural Section

Odat, Osama [1], Scarpella, Enrico [2].

Control of leaf tissue patterning by relative timing of cell proliferation and differentiation.

The relative timing of cessation of cell proliferation and onset of cell differentiation is known to control tissue patterning of animal appendices such as vertebrate limbs. It is instead unclear whether the relative timing of cessation of cell proliferation and onset of cell differentiation also controls tissue patterning of plant appendices. Here we address this problem for the internal tissues of Arabidopsis leaves. In Arabidopsis leaves, internal, ground cells proliferate and differentiate into mesophyll and vascular tissues. By prolonging or prematurely ceasing ground cell proliferation, and by delaying or prematurely promoting ground cell differentiation, we show that cessation of ground cell proliferation terminates vascular differentiation by permitting mesophyll differentiation. Thus the relative timing of cessation of cell proliferation and onset of cell differentiation controls tissue patterning of plant as well as of animal appendices.

1 - University of Alberta, Department of Biological Sciences , CW-405 Biological Sciences Building, Edmonton , AB, T6G 2E9, Canada
2 - University of Alberta, Department of Biological Sciences, CW-405 Biological Sciences Building, Edmonton , AB, T6G 2E9, Canada

Keywords:
Arabidopsis
leaf structure
Patterning 
Timing 
Proliferation
Differentiation 
Vascular.

Presentation Type: Poster:Posters for Sections
Session: P
Location: Hall D/The Shaw Conference Centre
Date: Monday, July 27th, 2015
Time: 5:30 PM
Number: PDS007
Abstract ID:790
Candidate for Awards:Katherine Esau Award,Developmental and Structural Section best poster,CSPB President's Award for Best Student Presentation