Lateral meristems

Definition

Lateral meristems are regions of plant growth that allow for the increase in thickness or girth of the plant. These meristems are found in woody plants and are responsible for secondary growth through the activity of vascular cambium and cork cambium.

5 Must Know Facts For Your Next Test

1. Lateral meristems include two main types: vascular cambium and cork cambium.
2. They are responsible for secondary growth, which increases the thickness of stems and roots.
3. The vascular cambium produces secondary xylem (wood) on the inside and secondary phloem on the outside.
4. Cork cambium generates cork cells, which form part of the bark and contribute to protective tissue.
5. Lateral meristems play a crucial role in forming tree rings, which can be used to estimate the age of a tree.

Review Questions

• What are the two main types of lateral meristems?
• How do lateral meristems contribute to secondary growth in plants?
• What is produced by the vascular cambium?

Related terms

Apical Meristem:

Regions at the tips of roots and shoots where primary growth occurs, leading to lengthening of the plant.

Vascular Cambium: A type of lateral meristem responsible for producing secondary xylem and phloem.

Cork Cambium: A type of lateral meristem that forms cork cells contributing to the outer bark.