Unformatted text preview: ms:
(Fig. 24-15c-d,e,f; Fig. 24-16)
A. Vascular Cambium à༎ SECONDARY XYLEM AND SECONDARY PHLOEM
- Vascular cambium develops by mitosis (periclinal divisions) of residual (undifferentiated) procambial
cells that persist between primary phloem and primary xylem (Fig. 24-15c) - Pericycle opposite protoxylem poles begins to divide and forms the closed circle of vascular cambium
around the xylem. - Once vascular cambium forms, repeated divisions of fusiform and ray initials give rise to cells of
secondary xylem to the inside, secondary phloem to...
View Full Document
This document was uploaded on 02/27/2014.
- Spring '14