Dermal tissue

Definition

Dermal tissue is the outer protective layer of a plant, consisting primarily of the epidermis. It serves as a barrier against physical damage and pathogens, while also regulating gas exchange and water loss.

5 Must Know Facts For Your Next Test

1. Dermal tissue includes structures like trichomes and stomata to aid in its functions.
2. The cuticle, a waxy layer on the epidermis, helps prevent water loss.
3. Guard cells within the dermal tissue control the opening and closing of stomata.
4. In woody plants, dermal tissue is replaced by periderm as the plant ages.
5. Dermal tissue plays a crucial role in protecting the plant from environmental stressors.

Review Questions

• What are the main functions of dermal tissue in plants?
• How do guard cells within dermal tissue regulate gas exchange?
• What role does the cuticle play in the functioning of dermal tissue?

Related terms

Epidermis: The outermost layer of cells covering leaves, stems, and roots.

Stomata: Pores found in the epidermis that facilitate gas exchange.

Cuticle: A waxy layer covering the epidermis that reduces water loss.