Which function is not correctly matched with the appropriate Phytohormone ?

Options

A. Apical hook formation dicot seedlings : Ethylene
B. Increase in the length of grapes stalks: Gibberellin
C. Induction of parthenocarpy in tomato : Auxin
D. Prevention of nutrient mobilization : cytokinin

Answer

To solve the question "Which function is not correctly matched with the appropriate Phytohormone?", we will analyze each option provided and determine if the function corresponds correctly to the specified phytohormone.

### Step-by-Step Solution:

1. **Understanding Phytohormones**:
- Phytohormones, also known as plant hormones or plant growth regulators, play crucial roles in regulating plant growth and development.

2. **Analyzing Each Option**:
- **Option 1: Apical hook formation in dicot seedlings by ethylene**:
- Ethylene is known to be involved in the formation of the apical hook in dicot seedlings. Therefore, this option is correctly matched.

- **Option 2: Increase the length of grape stalks by gibberellin**:
- Gibberellins are known to promote stem elongation and increase the length of internodes. Thus, this option is also correctly matched.

- **Option 3: Induction of parthenocarpy in tomato by auxin**:
- Auxins are indeed responsible for inducing parthenocarpy, which is the development of fruit without fertilization. This option is correctly matched as well.

- **Option 4: Prevention of nutrient mobilization by cytokinin**:
- Cytokinins are known to promote cell division and nutrient mobilization. The statement that cytokinin prevents nutrient mobilization is incorrect. Therefore, this option is not correctly matched.

3. **Conclusion**:
- The function that is not correctly matched with the appropriate phytohormone is **"Prevention of nutrient mobilization by cytokinin."**

### Final Answer:
The function that is not correctly matched with the appropriate phytohormone is **"Prevention of nutrient mobilization by cytokinin."**

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