Elastic domains regulate growth and organogenesis in the plant shoot apical meristem |
| |
| Authors: | Kierzkowski Daniel Nakayama Naomi Routier-Kierzkowska Anne-Lise Weber Alain Bayer Emmanuelle Schorderet Martine Reinhardt Didier Kuhlemeier Cris Smith Richard S |
| |
| Institution: | Institute of Plant Sciences, University of Bern, Bern, Switzerland. |
| |
| Abstract: | Although genetic control of morphogenesis is well established, elaboration of complex shapes requires changes in the mechanical properties of cells. In plants, the first visible sign of leaf formation is a bulge on the flank of the shoot apical meristem. Bulging results from local relaxation of cell walls, which causes them to yield to internal hydrostatic pressure. By manipulation of tissue tension in combination with quantitative live imaging and finite-element modeling, we found that the slow-growing area at the shoot tip is substantially strain-stiffened compared with surrounding fast-growing tissue. We propose that strain stiffening limits growth, restricts organ bulging, and contributes to the meristem's functional zonation. Thus, mechanical signals are not just passive readouts of gene action but feed back on morphogenesis. |
| |
| Keywords: | |
| 本文献已被 PubMed 等数据库收录！ |
|
