(abaxial-adaxial polarity) which is established with bulging of the primordia
#Development of a marginal meristem

Lateral organ and leaf development initiation is dependent upon the structure of the shoot apical meristem (SAM). In the center of the SAM, there is a central zone of many indeterminate, undifferentiated cells where cell division is infrequent. Cells divide more frequently in the peripheral zones flanking