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A theoretical study of flux-based PIN models

Michael Walker
Virtual Plants, INRIA & UMR AGAP
on 2012/05/11 at 11:00


Understanding developmental processes in plants requires a realistic model of how cells express the auxin effluxer molecule auxin. We present a mathematical and numerical analysis of the flux-based model, in which PIN allocation at a cell wall is determined by a super-linear function of the auxin flux through that wall. A particular point of interest is whether it is possible to simultaneously reproduce the diffuse PIN expression seen on the surface of the shoot apical mersitem along with a canalized allocation in its body with the same model and parameter values. We find that recognizing the surface as "sink-driven" and the interior as "source-driven" clarifies the factors affecting canalization.