Ringing/girdling experiment was first performed by

Options

A. Hartig
B. Strassburger
C. Godlewski
D. Bose

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks who first performed the ringing or girdling experiment. This experiment involves removing a ring of phloem from a plant stem.

2. **Defining the Experiment**: The ringing or girdling experiment is a method used to study the transport of nutrients in plants. When a ring of phloem is removed, the area above the ring swells due to the accumulation of sugars, while the area below the ring begins to die or shrink due to the lack of sugar transport.

3. **Identifying the Scientist**: The experiment was first performed by a scientist named Hartig in the year 1837.

4. **Evaluating Options**: The question provides multiple options:
- Option A: Hartig
- Option B: Strasburger
- Option C: Godleski
- Option D: Bose

5. **Analyzing Each Option**:
- **Option D (Bose)**: Jagdish Chandra Bose studied plant life but did not perform the ringing experiment.
- **Option C (Godleski)**: Proposed the relay pump theory, unrelated to the ringing experiment.
- **Option B (Strasburger)**: Known for his work on nuclear and cellular division, not the ringing experiment.
- **Option A (Hartig)**: Correctly identified as the scientist who performed the ringing experiment in 1837.

6. **Conclusion**: The correct answer to the question is **Option A: Hartig**.

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