Fig. 3

Distribution of number of phytomers in a walnut annual shoot with polycyclism (based on Sabatier and Barthélémy 2001): a Monte Carlo simulation (dots) and theoretical computation (line). The extension period follows a binomial law (10, 0.8), and the rest period follows a negative binomial law (1, 0.9). Five growth units are visible. b Five simulated series of “seasonal” (temperate) shoot development with polycyclism, where each symbol represents a type of meristem activity at a given computing unit: creation of a phytomer (square) and rest period (circle).Parameters of the distributions are the same as above. The number of GUs is variable. The fourth line shows a single GU followed by a long period of rest