In plant tissue culture experiments, high auxin to cytokinin ratio favours_________development and high cytokinin to auxin ratio favours_______development.

Options

A. root, shoot
B. root, root
C. shoot, shoot
D. shoot,root

Answer

To answer the question regarding the effects of auxin and cytokinin ratios in plant tissue culture, we can break down the solution into the following steps:

### Step 1: Understand the Role of Auxins and Cytokinins
Auxins and cytokinins are two types of plant hormones that play crucial roles in plant growth and development. Auxins are primarily involved in root formation, while cytokinins are associated with shoot formation.

### Step 2: Analyze the Ratios
- A **high auxin to cytokinin ratio** means that there is a greater concentration of auxins compared to cytokinins. This condition promotes root development.
- Conversely, a **high cytokinin to auxin ratio** indicates that there is a greater concentration of cytokinins compared to auxins. This condition promotes shoot development.

### Step 3: Fill in the Blanks
Based on the analysis:
- In plant tissue culture experiments, a high auxin to cytokinin ratio favours **root** development.
- A high cytokinin to auxin ratio favours **shoot** development.

### Final Answer
In plant tissue culture experiments, high auxin to cytokinin ratio favours **root** development and high cytokinin to auxin ratio favours **shoot** development.

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