Collect information about dermal tissues of plants in what way they help to them. (AS 4)

Dermal tissues of plants help them in following ways –

a) In desert plants cell walls of dermal tissues are even more thick and waxy.

b) Epidermis the dermal tissue layer has Small pores called stomata. They are enclosed by two kidney shaped cells, called guard cells.

c) Cells of the roots have long-hair like parts, called root hairs.

d) The dermal layer protects the plants from loss of water, mechanical damage and invasion by parasitic and disease-causing organisms.

e) In big trees the dermal tissue forms several layers above the epidermis. It is called bark.

f) Stomata and root hair are also dermal tissues that are essential for gaseous exchange and transpiration as well as absorption of water and minerals respectively. Photosynthesis is also carriedout by certain cells of dermal tissue.