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Organogenesis at the Shoot Apical Meristem

Laboratoire de Reproduction et Développement des Plantes, Université de Lyon, ENS de Lyon, UCBL, INRA, CNRS, 46 Allée d’Italie, 69364 Lyon CEDEX O7, France
Received: 1 November 2018 / Revised: 12 December 2018 / Accepted: 21 December 2018 / Published: 28 December 2018
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Lateral organ initiation at the shoot apical meristem involves complex changes in growth rates and directions, ultimately leading to the formation of leaves, stems and flowers. Extensive molecular analysis identifies auxin and downstream transcriptional regulation as major elements in this process. This molecular regulatory network must somehow interfere with the structural elements of the cell, in particular the cell wall, to induce specific morphogenetic events. The cell wall is composed of a network of rigid cellulose microfibrils embedded in a matrix composed of water, polysaccharides such as pectins and hemicelluloses, proteins, and ions. I will discuss here current views on how auxin dependent pathways modulate wall structure to set particular growth rates and growth directions. This involves complex feedbacks with both the cytoskeleton and the cell wall. View Full-Text
Keywords: shoot meristem; morphogenesis; molecular regulation; cell wall; cytoskeleton shoot meristem; morphogenesis; molecular regulation; cell wall; cytoskeleton

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Traas, J. Organogenesis at the Shoot Apical Meristem. Plants 2019, 8, 6.

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