Stele

Definition

The stele is the central part of a root or stem containing the vascular tissue, including xylem and phloem. It is crucial for the transport of water, nutrients, and food throughout the plant.

5 Must Know Facts For Your Next Test

1. The stele consists mainly of xylem and phloem tissues.
2. It is surrounded by the endodermis, which regulates the flow of materials into the vascular system.
3. The arrangement of tissues within the stele can vary between monocots and dicots.
4. In roots, the stele includes pericycle cells that are involved in lateral root development.
5. The central positioning of the stele allows efficient transport of water and nutrients from roots to other plant parts.

Review Questions

• What are the main components found within the stele?
• How does the structure of the stele differ between monocots and dicots?
• What role does the pericycle play in relation to the stele?

Related terms

xylem:

Vascular tissue responsible for transporting water and dissolved minerals from roots to other plant parts.

phloem:

Vascular tissue responsible for transporting sugars and other metabolic products downward from leaves.

endodermis:

A layer of cells surrounding the stele that regulates material flow into vascular tissues.