Mathematical model studies of the comprehensive generation of major and minor phyllotactic patterns in plants with a predominant focus on orixate phyllotaxis
Fig 8
Phyllotactic patterns generated in computer simulations using EDC2.
(A) Computer simulations using EDC2 were performed under various parameter settings (201 settings for −20≤A≤20, 101 settings for 0≤B≤1, and Γ = 1, 2, or 3) with fixed parameters α = 1 and N = 1/3, and the patterns obtained are displayed according to the color legend shown in Fig 3. Simulations were started by placing a single primordium on the SAM periphery. (B) Computer simulations using EDC2 were performed under various settings of parameters (101 settings for 0≤A≤20, 101 settings for 0≤B≤1, and Γ = 2, 2.5, or 3) with fixed parameters α = 1 and N = 1/3. The graph shows a scatter plot of alternate patterns with a constant divergence angle or a two-cycle change in the divergence angle (black), and tetrastichous alternate patterns with a four-cycle change in the divergence angle (red) generated in the computer simulations. In this graph, each pattern was plotted based on the ratio of absolute values of two successive divergence angles (abscissa) and the ratio of plastochron times (ordinate). The black dots surrounded by an orange circle represent semi-decussate-like patterns that occurred in the vicinities of orixate phyllotaxis in the parameter space, which are indicated by blue asterisks in S6A Fig. The blue dots indicate the data of real orixate phyllotaxis observed for winter buds of O. japonica (calculated from the data of P1~P2 and P2~P3 in Fig 4D).