Ncert Exercises & Solutions

36. Epidermal cells are often modified to perform specialised functions in plants. Name some of them and function they perform.

Modification of Epidermal Cells

The epidermal tissue has the following modifications

(i) Root Hair

Structure

Function

Unicellular hairs are the extensions of epidermal cell of roots in the root hair zone.

It increases the surface area for absorption of water and minerals.

(ii) Epidermal Appendages

Structure

Function

These are called trichomes and are epidermal cell modifications. There may be unicellular or multicellular.

Appendagesof epidermis of leaves
A- Stellate hair of a Alyssum
B- Glandular hair of Pelargonium
C- Short glandularhair of Lavandula
D- Floccose hair of Malva
E- Glandular hair of Solanum
F- Urtivating hair of Verbascum

Some performs for stinging produces and some glandular secretions.

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