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BP: Fachverband Biologische Physik

BP 28: Poster Session II

BP 28.19: Poster

Donnerstag, 30. März 2023, 18:00–20:00, P2/EG

Radial growth and the impact of stress on the cell division plane in the hypocotyl — •Mathias Höfler and Karen Alim — School of Natural Sciences, Technical University of Munich, Germany

The morphogenesis of plant tissue is a reliably stable and efficient process, yet individual cell shape and growth underlie high variance. Theory and experiment show that there is a mechanical and biochemical feedback loop for plant tissue development. In fact, mechanical stresses have a pronounced effect on microtubule orientation in the tissue, thereby changing the mechanical properties and leading to anisotropic cell growth. Here, we study the effect of cell mechanics, stress patterns and feedback mechanisms on the bidirectional radial growth of the plant hypocotyl. We furthermore study the connection between mechanical stresses and the choice of cell division plane orientation. We seek to unveil the minimal biophysical requirements and relevant forces to achieve the experimentally observed morphologies. Our results show that inhomogeneous growth generates distinct stress patterns in the tissue . Introducing cell division along the direction of maximum stress furthermore gives us a first perspective on how radial growth morphologies emerge.