Induction of differentiation in the shoot apical meristem by transient overexpression of a retinoblastoma-related protein
- Wyrzykowska, Joanna Institute of Plant Sciences, Swiss Federal Institute of Technology Zürich, Switzerland
- Schorderet, Martine Department of Biology-Plant Biology, University of Fribourg, Switzerland
- Pien, Stéphane Institute of Plant Sciences, Swiss Federal Institute of Technology Zürich, Switzerland - Department of Plant Biology, University of Zürich, Switzerland
- Gruissem, Wilhelm Institute of Plant Sciences, Swiss Federal Institute of Technology Zürich, Switzerland
- Fleming, Andrew J. Institute of Plant Sciences, Swiss Federal Institute of Technology Zürich, Switzerland - Department of Animal and Plant Sciences, University of Sheffield, United Kingdom
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30.06.2006
Published in:
- Plant Physiology. - 2006, vol. 141, no. 4, p. 1338-1348
English
The shoot apical meristem contains cells that undergo continual growth and division to generate the building blocks for the aerial portion of the plant. As cells leave the meristem, they undergo differentiation to form specific cell types. Most notably, heterotrophic cells of the meristem rapidly gain autotrophic capability by synthesis and assembly of components of the chloroplast. At the same time, cells undergo enlargement via vacuolation. Despite significant advances in the characterization of transcriptional networks involved in meristem maintenance and leaf determination, our understanding of the actual mechanism of meristem cell differentiation remains very limited. Using a microinduction technique, we show that local, transient overexpression of a retinoblastoma-related (RBR) protein in the shoot apical meristem is sufficient to trigger cells in the meristem to undergo the initial stages of differentiation. Taken together with recent data showing that RBR protein plays a key role in restricting stem cell differentiation in the root apical meristem, our data contribute to an emerging picture of RBR proteins as a central part of the mechanism controlling meristem cell differentiation.
- 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 6309
- DOI 10.1104/pp.106.083022
- Persistent URL
- https://folia.unifr.ch/unifr/documents/300209
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