Pericycle

Definition

The pericycle is a layer of cells located just inside the endodermis and surrounding the vascular tissues in plant roots. It plays a crucial role in the formation of lateral roots and contributes to secondary growth.

5 Must Know Facts For Your Next Test

1. The pericycle is involved in the initiation of lateral root formation.
2. It consists of parenchyma cells that retain the ability to divide.
3. The pericycle is situated between the endodermis and the vascular tissues (xylem and phloem).
4. In dicotyledonous plants, it contributes to secondary growth by forming part of the vascular cambium.
5. The pericycle helps regulate nutrient transport from roots to other parts of the plant.

Review Questions

• Where is the pericycle located within a plant root?
• What role does the pericycle play in lateral root development?
• How does the pericycle contribute to secondary growth in dicotyledonous plants?

Related terms

endodermis:

A single layer of cells surrounding the vascular tissues, acting as a selective barrier for nutrient and water uptake

vascular cambium:

A layer of meristematic cells that contributes to secondary growth by producing xylem and phloem

parenchyma cells: Fundamental tissue composed of thin-walled living cells that function in photosynthesis, storage, and tissue repair