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Which of the following conclusions can b...

Which of the following conclusions can be drawn from the girdling experiment?

A

Transport of food is bidirectional .

B

Xylem is the tissue responsible for translocation of food.

C

Xylem is the tissue responsible for the transport of water.

D

Phloem is the tissue responsible for translocation of food.

Text Solution

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The correct Answer is:
### Step-by-Step Solution: 1. **Understanding the Girdling Experiment**: - The girdling experiment involves removing a ring of bark and phloem from a plant stem. This is done to observe the effects on the plant's health and functionality. 2. **Role of Phloem**: - Phloem is the vascular tissue responsible for the transport of nutrients, particularly the products of photosynthesis (sugars), from the leaves (where they are produced) to other parts of the plant, including the roots. 3. **Observation After Girdling**: - After conducting the girdling experiment, it is observed that the area above the girdled section (where the phloem has been removed) begins to swell. This swelling occurs because the food produced in the leaves cannot be transported downwards to the roots. 4. **Consequences of Girdling**: - As the food cannot reach the roots, the roots will eventually starve and die due to lack of nutrients. Without healthy roots, the plant will also struggle to absorb water, leading to the death of the entire plant. 5. **Conclusion from the Experiment**: - The key conclusion from the girdling experiment is that phloem is essential for the translocation of food within the plant. The experiment clearly demonstrates that when the phloem is damaged or removed, the plant cannot sustain itself. ### Final Answer: - The conclusion that can be drawn from the girdling experiment is that **phloem is the tissue responsible for the translocation of food**. ---
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