Why Is The Cork Impervious To Water?

Cork or phellem is the outer dead cell layer of the cork cambium. It can be fissured, scaly or even smooth. The main difference between the phellem (cork) and the phelloderm (inside of cork cambium) is the ‘suberisation’.

The cork is made of a waxy substance termed suberin that forms a protective layer. As a result of the deposition of suberin in the cell wall, the cork is impervious to water.

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