What is the role of epidermis in plants ?

Ans . Role of epidermis in plants:

(i) It protects the underlying cells and tissues.

(ii) In plants living in very dry habitats, it becomes thick and prevents water loss.

(iii) Epidermal cells on the aerial parts of the plant secrete a waxy, water-resistant layer on outer surface which protects against loss of water, mechanical injury and invasion. by parasitic fungi.

(iv) Leaf epidermis contains pores called stomata which help in the exchange of gases and transpiration.

(v) Epidermal cells of the roots help in the absorption of water.

(vi) Epidermal cells of old plants become several layers thick and forms cork or bark. These cells contain a chemical called suberin in their walls which makes them impervious to gases and water.

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