How does the cork act as a protective tissue?
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Cork is protective tissue with dead suberized cells that forms thick and waterproof covering of older stem and root. Suberin is a waterproofing waxy substance which restricts the water movement. Presence of suberin in dead cells of cork and absence of intercellular spaces makes the cells impermeable to water and gases thereby protecting the underlying tissues from desiccation, mechanical injury and pathogenic infection. ...........
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Cork act as a protective tissue because (i) Its cells are dead and compactly arranged without intercellular spaces. (ii) They also have deposition of suberin on the walls that makes them impervious to gases and water
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