Which of the following statement is false with respect to the application of auxins?

Options

A. Control direction of growth of plants
B. Inhibits lateral bud growth
C. Initiate and promote cell division actively particularly in tissue culture
D. Produce hyperelongation effect

Answer

To determine which statement is false with respect to the application of auxins, we will analyze each statement related to the functions of auxins:

1. **Controlled direction of growth of plants**: Auxins are known to regulate the direction of growth in plants. They promote elongation of cells on the side of the plant that is away from the light, causing the plant to bend towards the light source (phototropism). This statement is true.

2. **Inhibits lateral bud growth**: Auxins are responsible for apical dominance, which is the phenomenon where the growth of the main shoot is favored over the growth of lateral buds. This means that auxins inhibit the growth of lateral buds. This statement is also true.

3. **Initiate and promote cell division actively, particularly in tissue culture**: While auxins play a role in cell elongation and differentiation, the hormone primarily responsible for promoting cell division is cytokinin, not auxin. Therefore, this statement is false.

4. **Produce hyper-elongation effect**: Auxins are known to promote cell elongation, leading to the hyper-elongation of plant cells. This statement is true.

Based on the analysis, the false statement with respect to the application of auxins is the third one: "Initiate and promote cell division actively, particularly in tissue culture."

### Summary of the Solution:
- Statement 1: True - Auxins control the direction of growth.
- Statement 2: True - Auxins inhibit lateral bud growth (apical dominance).
- Statement 3: False - Auxins do not actively promote cell division; cytokinin does.
- Statement 4: True - Auxins produce a hyper-elongation effect.

**Correct Answer**: The third statement is false.