Thickening material present in wall of collenchyma is

Options

A. Pectin, cellulose, hemicellulose
B. Lignin, cellulose, hemicellulose
C. Hemicellulose,suberin, cellulose
D. Suberin,pectin, cellulose.

Answer

To determine the thickening material present in the wall of collenchyma, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Collenchyma**:
- Collenchyma is a type of simple permanent tissue in plants that provides mechanical support and flexibility. It is characterized by its elongated cells with thickened cell walls.

2. **Identify Cell Wall Composition**:
- The cell walls of collenchyma are known for their uneven thickening. This means that the thickness of the cell wall is not uniform throughout the cell.

3. **Analyze the Components of the Cell Wall**:
- The primary materials that make up the cell wall of collenchyma include pectin, hemicellulose, and cellulose.
- Among these, pectin and hemicellulose are present in higher concentrations compared to cellulose.

4. **Concentration of Components**:
- According to the information, the approximate concentrations of these components in the collenchyma cell wall are:
- Pectin: 45%
- Hemicellulose: 35%
- Cellulose: 20%

5. **Select the Correct Answer**:
- Given the options, the thickening materials present in the wall of collenchyma are pectin, hemicellulose, and cellulose. Therefore, the correct answer is the option that includes all three components.

### Final Answer:
The thickening material present in the wall of collenchyma is **pectin, hemicellulose, and cellulose**.

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