A combinatorial model of phyllotaxis perturbations in [i]Arabidopsis thaliana[/i]

Yassin Refahi (1, 2) , Etienne Farcot (1, 2) , Yann Guédon (2, 1) , Fabrice Besnard (3) , Teva Vernoux (3, 2) , Christophe Godin (1, 2)

1 UMR AGAP - Amélioration génétique et adaptation des plantes méditerranéennes et tropicales
2 VIRTUAL PLANTS - Modeling plant morphogenesis at different scales, from genes to phenotype
3 RDP - Reproduction et développement des plantes

Phyllotaxis is the geometric arrangement of organs in plants, and is known to be highly regular. However, experimental data (from [i]Arabidopsis thaliana[/i]) show that this regularity is in fact subject to specific patterns of permutations. In this paper we introduce a model for these patterns, as well as algorithms designed to identify these patterns in noisy experimental data. These algorithms thus incorporate a denoising step which is based on Gaussian-like distributions for circular data for which a common dispersion parameter has been previously estimated. The application of the proposed algorithms allows us to confirm the plausibility of the proposed model, and to characterize the patterns observed in a specific mutant. The algorithms are available in the OpenAlea software platform for plant modelling [10].

Mots clés: phyllotaxis perturbations; arabidopsis thaliana

Domaines: Sciences du Vivant [q-bio]

Yassin Refahi, Etienne Farcot, Yann Guédon, Fabrice Besnard, Teva Vernoux, et al.. A combinatorial model of phyllotaxis perturbations in [i]Arabidopsis thaliana[/i]. 22. Annual Symposium on Combinatorial Pattern Matching (CPM 2011), Jun 2011, Palerme, Italy. 480 p. ⟨hal-01190615⟩