Elastic domains regulate growth and organogenesis in the plant shoot apical meristem
- Kierzkowski, Daniel Institute of Plant Sciences, University of Bern, Switzerland
- Nakayama, Naomi Institute of Plant Sciences, University of Bern, Switzerland
- Routier-Kierzkowska, Anne-Lise Institute of Plant Sciences, University of Bern, Switzerland
- Weber, Alain Institute of Plant Sciences, University of Bern, Switzerland
- Bayer, Emmanuelle CNRS—Laboratoire de Biogenèse Membranaire, UMR5200, Bordeaux, France
- Schorderet, Martine Department of Biology, University of Fribourg, Switzerland
- Reinhardt, Didier Department of Biology, University of Fribourg, Switzerland
- Kuhlemeier, Cris Institute of Plant Sciences, University of Bern, Switzerland
- Smith, Richard S. Institute of Plant Sciences, University of Bern, Switzerland
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02.03.2012
Published in:
- Science. - 2012, vol. 335, p. 1096
English
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.
- Faculty
- Faculté des sciences et de médecine
- Department
- Département de Biologie
- Language
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- English
- Classification
- Biological sciences
- License
- License undefined
- Identifiers
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- RERO DOC 28676
- DOI 10.1126/science.1213100
- Persistent URL
- https://folia.unifr.ch/unifr/documents/302406
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