Lenticels

Definition

Lenticels are small, spongy openings in the bark of stems and roots that facilitate gas exchange between the internal tissues and the atmosphere. They appear as raised, oval, or elongated areas on the surface of woody plants.

5 Must Know Facts For Your Next Test

1. Lenticels are critical for providing oxygen to living cells in the stem.
2. They are most noticeable on young branches and fruits.
3. Lenticels remain open during wet conditions unlike stomata which close to prevent water loss.
4. Their formation is influenced by environmental factors such as oxygen levels and humidity.
5. An excess of lenticels can indicate poor plant health or overly moist conditions.

Review Questions

Related terms

Stomata: Openings on leaves and stems that regulate gas exchange and water loss.

Cork Cambium: A layer of tissue in plant stems that produces cork cells, contributing to bark formation.

Aerenchyma: A type of plant tissue with large air spaces, facilitating gas exchange in aquatic plants.