All these are properties of auxin except

Options

A. elongation
B. apical dominance
C. parthenocarpy
D. abscission

Answer

To determine which of the given processes is not a property of auxin, we can analyze each option provided: elongation, apical dominance, parthenocarpy, and abscission.

### Step-by-Step Solution:

1. **Understanding Auxin**: Auxin is a plant hormone that plays a crucial role in various growth processes. It is known for promoting cell elongation, influencing apical dominance, and facilitating parthenocarpy.

2. **Analyzing Each Option**:
- **Elongation**: Auxin is well-known for promoting cell elongation, especially in stems. This is a key property of auxin.
- **Apical Dominance**: Auxin is responsible for apical dominance, where the main central stem inhibits the growth of lateral buds. This is another established property of auxin.
- **Parthenocarpy**: Auxin plays a role in the development of fruits without fertilization, known as parthenocarpy. This is also a property of auxin.
- **Abscission**: Abscission refers to the process of shedding leaves, flowers, or fruits. This process is primarily regulated by other hormones, particularly ethylene and abscisic acid, rather than auxin.

3. **Conclusion**: Among the options provided, abscission is not a property of auxin. Therefore, the correct answer is "abscission".

### Final Answer:
All these are properties of auxin except **abscission**.

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