Berlin 2015 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 69: Complex Fluids and Soft Matter (joint session BP/DY/CPP)
DY 69.9: Vortrag
Freitag, 20. März 2015, 11:45–12:00, H 1058
Mechanical regulation of vein morphogenesis in plant leaves — •Jonathan E. Dawson1, Franck A. Dintengou2, Irina Kneuper2, William Teale2, Klaus Palme2, and Eleni Katifori1 — 1Max Planck Institute for Dynamics and Self-Organization, Göttingen, Germany — 2Insitute of Bioloy II, Albert-Ludwigs-Universität Freiburg, Freiburg, Germany
Development of leaf veins is a highly dynamic and regulated process. However, mechanisms that regulate the formation of veins and vascular architecture are largely unknown. In a growing leaf, in addition to genetic regulation, cell mechanics must also play an important role in forming veins. To what extent cell mechanics and the interplay between mechanics and biochemistry plays a role in vascular patterning is not well understood. Using a cell based model in which cells are polygons, here we describe the vascular development in early stages of growing leaf primordia. We investigate the formation of leaf primary vein by simulating tissue growth driven by inter-cellular diffusion of the plant hormone auxin, from auxin synthesizing cells. We show that dynamic modulation of the cell mechanical properties based on cell auxin concentration can reproduce realistic primary vein as observed in growing leaf primordia. We further tested our model by comparing with experiments in which auxin transport in affected.