
Dynamical Model Applet (Centric Representation)
This applet shows a model of primordia
growth (represented by dots) at the apical meristem of a plant.
The model is a dynamical system which implements Hofmeister's
hypotheses: primordia form periodically, once formed they
move radially at a certain rate, they form as far as possible
from existing primordia. In this applet, we are using the
radial velocity as a slowly decreasing parameter. This
is equivalent to decreasing the plastochrone ratio, which
is known to happen in plants at the onset of the flowering
stage (inflorescence).


How To Use This Applet
To stop
the growth, click anywhere on the applet window. Click again to
continue the growth.
To draw
your own parastichies, click on the window to stop, and then click
on draw. You can clear your drawing, and change color by pressing
the appropriate buttons. To continue the growth
after drawing, click on "draw" and then click on the window.
The button "show graph" shows the graphs of the divergence
angle between successive primordia as a function of time
(top graph) and the rate of growth (ratio of distances to
the center of the successive primordia) as function of time
(bottom graph).

