Regensburg 2022 – wissenschaftliches Programm
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BP: Fachverband Biologische Physik
BP 7: Poster 1
BP 7.15: Poster
Montag, 5. September 2022, 18:00–20:00, P1
Mechanical growth and auxin patterning in plant tissues — •Mathias Höfler1 and Karen Alim1,2 — 1Physics Department and CPA, Technische Universität München — 2Max-Planck-Institut für Dynamik und Selbstorganisation, Göttingen
Individual cell shape and growth underlies a high variance in living organisms. It is puzzling how on a larger scale, the morphogenesis of a tissue can be a reliably stable and efficient process. Theory and experiment show that there is a mechanical and biochemical feedback loop for tissue development and morphogenesis. Mechanical forces in plants have a pronounced effect on the microtubule orientation in cells, thereby changing the cell's mechanical properties, causing an impact on the magnitude and direction, hence anisotropy, of cell growth. Here we study the effect of cell mechanics on the bidirectional, radial growth of tissue in the plant stem. We investigate feedback mechanisms, stress patterns and how these affect tissue and early organ shape and development. For the latter, we furthermore study the role of the growth hormone auxin in the shoot apical meristem (SAM). Here, auxin induces cell wall loosening thus enhancing mechanical growth via biochemical feedback.