HORTICULTURE

Detailed explanation-1: -The cork cambium or pericambium or Phellogen initially forms from the parenchyma cells in the cortex and at times in the primary phloem. It produces new dermal tissues which gradually replaces the epidermis which is formed by the protoderm.

Detailed explanation-2: -The cork cambium forms bark and cork cells. The cork cambium is the secondary meristem which contains meristematic cells. A major part of the bark in woody plants consists of cork cambium. Even though the phloem is made by the vascular cambium, the secondary phloem is also a constituent of the bark.

Detailed explanation-3: -The cork cambium arises from the pericycle in roots and the parenchyma cells of the cortex in stems, both of which arise from the ground meristem. The cork cambium produces periderm, secondary dermal tissue that is also a component of bark. (See Roots and Secondary Stem for more details; Figures 18.2.

Detailed explanation-4: -Phellogen layer or cork cambium is a dividing zone of cells that forms phellem to the outside and phelloderm to the inside. In other words, it forms the outer bark. This cambial zone is constantly on the move outward as the tree grows.