-Kumudinee, Subject Matter Expert at Expert
Solution: Yes, the cork is naturally formed from the tissues of cork cambium. Phellogen which is otherwise called cork cambium is formed during secondary growth of Dicot stem.
Cork cambium or phellogen cuts off on both sides. The cells produced towards the outer side get differentiated into cork or phellem while the inner cells get differentiated into secondary cortex or phelloderm.
The cork cells are impervious to water due to deposition of suberin in the cell wall hence does not allow the passage of water.