Epidermal Tissue System - QS Study
QS Study

Epidermal tissue system: This is the outer most layer of the plant body. Typically it consists of a single layer of parenchymatous cells. This system solely consists of the outermost skin or epidermis of all the plant organs beginning from the underground roots to the fruits and seeds. Epidermal out growth and stomata form this tissue.

Position: The epidermal tissue system forms the outer-most covering of the whole plant body and comprises epidermal cells, stomata and the epidermal appendages – the trichomes and hairs The outermost layer of the plant body is made of this tissue. The epidermis of stem, branch, leaf, root, fruit etc., is formed from this tissue.

Origin: This tissue originates from primary apical meristematic tissue.

Structure: The epidermal tissue system is made of the following three types of elements:

a) Epidermis: It protects the internal tissues and minimizes the loss of water through evaporation.

b) Epidermal stoma: To remove excessive water from the aquatic plants as liquid form.

c) Epidermal out growth: Stem hair helps in giving self defence of the plant