Question

Explain the types of collenchyma

Answer 1

Collenchyma cells are elongated cells with thickened cell walls that provide structure and support for plants. There are four types of collenchyma cells: tangential, annular, lacunar, and angular. They are characterized by the thickness of their cell walls and the amount of intercellular space around them.

Answer 2

Types of Collenchyma:

1. Angular Collenchyma

2. Lacunar Collenchyma

3. Lamellar Collenchyma

1. Angular Collenchyma:

It is the most common type of collenchyma with irregular arrangement and thickening at the angles where cells meets.
Example: Hypodermis of Datura and Nicotiana.

2. Lacunar Collenchyma:

The collenchyma cells are irregularly arranged. Cell wall is thickening on the walls bordering intercellular spaces.
Example: Hypodermis of Ipomoea.

3. Lamellar Collenchyma:

The collenchyma cells are arranged compactly in layers (rows). The Cell wall is thickening is at tangential walls. These thickening appear as successive tangential layers.
Example: Hypodermis of Helianthus.

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