植物器官を形づくる多細胞力学

抄録

We will present several studies of how growing multicellular tissues shape organs, combining quantitative mechanistic models with plant experiments with respect to cell shape and division patterns. We found that the outlines of the root tip best fitted to the catenary curve across flowering plant species. Based on the physics of catenary curves, we predicted in silico and verified in vivo that the anisotropy of the cell division at root tips and the absence at the perifery are necessary and sufficient conditions for catenary-shaped organ formation. Moreover, such localized cell divisions is decoded into a globally oriented mechanical stress to shape the vascular tissue symmetry, representing a reasonable mechanism controlling the symmetry in tissue lacking cell fluidity. Finally, we will report the current progress of 3D multicellular mechanical model.