Toward a 3D model of phyllotaxis based on a biochemically plausible auxin-transport mechanism

Hartmann, Félix P.; Barbier de Reuille, Pierre; Kuhlemeier, Cris (2019). Toward a 3D model of phyllotaxis based on a biochemically plausible auxin-transport mechanism. PLoS computational biology, 15(4), e1006896. Public Library of Science 10.1371/journal.pcbi.1006896

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Polar auxin transport lies at the core of many self-organizing phenomena sustaining continuous plant organogenesis. In angiosperms, the shoot apical meristem is a potentially unique system in which the two main modes of auxin-driven patterning—convergence and canalization—co-occur in a coordinated manner and in a fully three-dimensional geometry. In the epidermal layer, convergence points form, from which auxin is canalized towards inner tissue. Each of these two patterning processes has been extensively investigated separately, but the integration of both in the shoot apical meristem remains poorly understood. We present here a first attempt of a three-dimensional model of auxin-driven patterning during phyllotaxis. We base our simulations on a biochemically plausible mechanism of auxin transport proposed by Cieslak et al. (2015) which generates both convergence and canalization patterns. We are able to reproduce most of the dynamics of PIN1 polarization in the meristem, and we explore how the epidermal and inner cell layers act in concert during phyllotaxis. In addition, we discuss the mechanism by which initiating veins connect to the already existing vascular system.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS) > Plant Development
08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS)

UniBE Contributor:

Hartmann, Felix Prosper; Barbier de Reuille, Pierre and Kuhlemeier, Cris

Subjects:

500 Science > 580 Plants (Botany)

ISSN:

1553-734X

Publisher:

Public Library of Science

Language:

English

Submitter:

Peter Alfred von Ballmoos-Haas

Date Deposited:

04 Sep 2019 15:22

Last Modified:

25 Oct 2019 21:43

Publisher DOI:

10.1371/journal.pcbi.1006896

Uncontrolled Keywords:

auxins; cell membranes; leaf veins; biosynthesis; biochemical simulations; exocytosis; apoplastic space; biophysical simulations

BORIS DOI:

10.7892/boris.133001

URI:

https://boris.unibe.ch/id/eprint/133001

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