Computer simulations reveal properties of the cell-cell signaling network at the shoot apex in Arabidopsis

Barbier de Reuille Pierre, Bohn-Courseau Isabelle, Ljung Karin, Morin Halima, Carraro Nicola, Godin Christophe, Traas Jan. 2006. Computer simulations reveal properties of the cell-cell signaling network at the shoot apex in Arabidopsis. Proceedings of the National Academy of Sciences of the United States of America, 103 (5) : 1627-1632.

Liste HCERES des revues (en SHS) : oui

Thème(s) HCERES des revues (en SHS) : Economie-gestion; Psychologie-éthologie-ergonomie

Résumé : The active transport of the plant hormone auxin plays a major role in the initiation of organs at the shoot apex. Polar localized membrane proteins of the PIN1 family facilitate this transport, and recent observations suggest that auxin maxima created by these proteins are at the basis of organ initiation. This hypothesis is based on the visual, qualitative characterization of the complex distribution patterns of the PIN1 protein in Arabidopsis. To take these analyses further, we investigated the properties of the patterns using computational modeling. The simulations reveal previously undescribed properties of PIN1 distribution. In particular, they suggest an important role for the meristem summit in the distribution of auxin. We confirm these predictions by further, experimentation and propose a detailed model for the dynamics of auxin fluxes at the shoot apex.

Mots-clés Agrovoc : Arabidopsis, pousse, méristème apical, auxine, modèle mathématique, physiologie végétale, cellule, substance de croissance végétale

Mots-clés complémentaires : Apex

Classification Agris : F62 - Physiologie végétale - Croissance et développement
U10 - Informatique, mathématiques et statistiques

Champ stratégique Cirad : Axe 1 (2005-2013) - Intensification écologique

Auteurs et affiliations

• Barbier de Reuille Pierre, INRA (FRA)
• Bohn-Courseau Isabelle, INRA (FRA)
• Ljung Karin, Swedish University of Agricultural Sciences (SWE)
• Morin Halima, INRA (FRA)
• Carraro Nicola, Università degli Studi-Padova (ITA)
• Godin Christophe, CIRAD-AMIS-UMR AMAP (FRA)
• Traas Jan, INRA (FRA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/532470/)

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