The movement shown by a plant kept in a phototropic chamber is due to

Options

A. Differential synthesis of hormones
B. Differential translocation of hormones
C. None of these
D. Both (1) and (2)

Answer

To solve the question regarding the movement shown by a plant kept in a phototropic chamber, we need to understand the role of hormones in plant growth and how they respond to light.

### Step-by-Step Solution:

1. **Understanding Phototropism**:
- Phototropism is the growth movement of a plant in response to light. Plants tend to grow towards the light source.

2. **Role of Auxin**:
- Auxin is a plant hormone that plays a crucial role in regulating plant growth. It is primarily responsible for cell elongation.

3. **Differential Distribution of Auxin**:
- When a plant is exposed to light from one side, auxin is distributed unevenly. The cells on the side of the plant that is farthest from the light source accumulate more auxin.

4. **Cell Elongation**:
- The increased concentration of auxin on the shaded side of the plant causes those cells to elongate more than the cells on the light-exposed side. This differential growth results in the bending of the plant towards the light.

5. **Translocation of Hormones**:
- The term "translocation" refers to the movement of auxin from one part of the plant to another. In this case, it is the movement of auxin towards the shaded side of the plant that leads to differential growth.

6. **Conclusion**:
- Therefore, the movement shown by a plant kept in a phototropic chamber is due to the differential translocation of the hormone auxin, which causes the plant to bend towards the light.

### Final Answer:
The movement shown by a plant kept in a phototropic chamber is due to **differential translocation of hormone** (specifically auxin).

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