A Dynamical Phyllotaxis Model to Determine Floral Organ Number
Fig 5
The potential landscape captures tetramerous whorl formation.
A–C. Color-coded potential landscape (upper panel; legend) and the section (bottom panel) at the angle where Uini takes the global minimum so that the fifth primordium arises (white dashed line in upper panel; Eq 6). The green line shows the meristem edge with a diameter of R0. The direction of the potential at the position where the fifth primordium arises, denoted by the red circle, is inward in B but outward in A and C (bottom panel). R0 = 5.0 (A), 15.0 (B), 45.0 (C). D. Radial positions that take the local minima (rmin, blue circles) and maxima (rmax, red squares) of potential Ug,5 (Eq 6). Between R0 = rmin and rmax, indicated by the two arrowheads, the potential at the meristem edge decreases inward as in B. Black diamonds correspond to the initiating position of the fifth primordium of A–C. Vτ = 6.0, σθ = 0.0, λini = λg = 10.0, and PMP = 0 in A–D. E. Superposition of the analytical result onto the numerical results (Fig 3A). Solid lines show the crossovers rmin = R0 and rmax = R0, respectively (arrowheads in D). λini = λg = 10.0 and PMP = 0. σr = σθ = 0.05 for numerical result, σθ = 0.0 for analytical result.