Which of the following is not the main function of the root sytem?

Options

A. Provide anchorage to the plant parts
B. Synthesis of PGRs
C. Absorption of water and minerals from soil
D. Photosynthesis

Answer

To determine which of the following is not a main function of the root system, we will analyze each option provided:

1. **Provide anchorage to the plant parts**:
- The root system is essential for anchoring the plant in the soil. It holds the plant in place, preventing it from being uprooted by wind or water. This is indeed a primary function of the root system.

2. **Synthesis of PGR (Plant Growth Regulators)**:
- Roots are involved in the synthesis of certain plant hormones, such as cytokinins and gibberellins. While this is a function of the root system, it is not as critical as the other functions. However, it is still considered a main function.

3. **Absorption of water and minerals from the soil**:
- One of the primary roles of the root system is to absorb water and essential minerals from the soil, which are vital for the plant's growth and development. This is a main function of the root system.

4. **Photosynthesis**:
- Photosynthesis is the process by which plants convert light energy into chemical energy, primarily occurring in the leaves where chlorophyll is present. Roots are located underground and do not have access to sunlight, making them incapable of performing photosynthesis. Therefore, this is not a function of the root system.

Based on the analysis of the options, the answer is:

**Photosynthesis** is not a main function of the root system.