Fig. 6.

Ontogenic and plastochronic variations in the oil palm SAM. Outlines of median longitudinal sections of the SAM and leaf primordium P1 at different developmental stages: embryo (1); germinating plantlet (2); 3-month-old plant (3); 10-month-old plant (4); and 10-year-old-plant (5). The three different mature SAMs observed from 10-year-old plants are represented in (5). The tunica is indicated by the two outlines. The central zone and peripheral and rib meristem-like zones are indicated in light and dark grey, respectively, in (4) and (5). Scale bar = 100 µm.