Vascular cylinder

Definition

The vascular cylinder is the central part of a plant root or stem that contains the primary xylem and phloem. It is crucial for the transport of water, nutrients, and photosynthates throughout the plant.

5 Must Know Facts For Your Next Test

1. The vascular cylinder is also known as the stele.
2. It typically includes pericycle, xylem, phloem, and sometimes pith.
3. In roots, the vascular cylinder is surrounded by the endodermis.
4. The arrangement of xylem and phloem within the vascular cylinder differs between monocots and dicots.
5. The pericycle within the vascular cylinder can give rise to lateral roots.

Review Questions

• What components are typically found in a plant's vascular cylinder?
• How does the arrangement of xylem and phloem in the vascular cylinder differ between monocots and dicots?
• What role does the pericycle play within the vascular cylinder?

Related terms

Xylem: Tissue responsible for transporting water and minerals from roots to other parts of the plant.

Phloem: Tissue responsible for transporting sugars and other metabolic products downward from leaves.

Endodermis: A layer of cells surrounding the vascular cylinder in roots, regulating water flow into it.