Page 106 - PG 101-Course notes مذكرة النظري 24-25 with spec

Medicinal plants (PG 101) Level 1 Clinical Pharmacy-PharmD

Secondary growth in the dicot root

1- The cambium appears at first as a number of disconnected concave arcs.

2- The pericyclic cells become meristematic, thus united the separate arcs of cambium

into a continuous band running between the primary xylem and the primary phloem.

3- The concave arcs of cambium move outwards, carrying the phloem with them to

form a perfect circle.

4- The cambium divided producing secondary xylem to the inside and secondary

phloem to the outside.

5- Formation of cork.

80