Difference between Lenticels and Hydathodes

Lenticels and Hydathodes are adaptations in plants that facilitate the exchange of gases and removal of water. They are small pores which help in the primary and secondary growth of plants.

What are Lenticels?

Lenticels are lens-shaped openings or large intercellular spaces in the periderm of the bark of woody stems and roots of dicot plants. They facilitate the exchange of gases from the internal tissues to the outside environment. The shape of lenticels are a key in the identification of trees.

Lenticels are also seen in potato tubers and fruits, such as apples and pears.

What are Hydathodes?

Hydathodes are pores found on the margins of leaves in angiosperms. They exude excess water from the leaf margins through a process called guttation. Hydathodes are made up of living cells with numerous intercellular spaces that are filled with water. They have very few chloroplasts and are often modifications of the bundle-ends.

They are commonly found in water lettuce, water hyacinth, rose and balsam.

Let us now differentiate between lenticels and hydathodes.

Lenticels
Hydathodes
Definition
Lenticels are intercellular spaces that facilitate exchange of gases. Hydathodes are pores that store water and help in excess removal of water.
Storage particle
Air Water
Location
It is present in the barks and roots of dicots. It is present on the leaf margins of angiosperms.
Examples
Pears, apples and potatoes. Water hyacinth, water lettuce, balsam, etc.
Function
It maintains the gaseous balance between the internal tissue and the external environment. It maintains the xylem pressure of the plant.

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Frequently Asked Questions

What is the difference between lenticels and stomata?

Stomata occur on the lower epidermis of leaves, whereas lenticels are found in the periderm of woody plants.

What is the difference between transpiration and guttation?

Transpiration is the loss of water through stomata, whereas guttation is the loss of water through hydathodes.

Why are lenticels called breathing pores?

Lenticels are called the breathing pores because they allow the entry of oxygen to the tissues in the bark.

Is Lenticel an excretory organ?

Yes, both stomata and lenticels are considered as excretory organs of plants.

Why are lenticels always open?

Lenticels are open day and night to aid in the removal of water. Since the stomata close at night, lenticels remain open to maintain the xylem pressure.

From which tissues are lenticels formed?

Lenticel formation begins below the stomatal epidermis when the secondary growth begins at the periderm.

Do all plants have lenticels?

Lenticels are not confined to woody plants. They are also found in fruits such as apples, pears and carrots.

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