Initiation of lateral roots and vascular cambium during secondary growth takes place in cells of 

Initiation of lateral roots and vascular cambium during secondary growth takes place in cells of pericycle.
(1) Epiblema or the root epidermis does not participate in the formation of lateral roots and vascular cambium.
(2) Cells of the cortex undergo dedifferentiation and form the cork cambium.
(3) Endodermis does not participate in the formation of lateral roots and vascular cambium.