Cytokinin synthesis is maximum in

Options

A. Roots
B. Leaves
C. Shoot tip
D. Fruit.

Answer

**Step-by-Step Solution:**

1. **Understanding Cytokinins**: Cytokinins are a class of plant hormones (phytohormones) that play a crucial role in promoting cell division (cytokinesis) and delaying senescence (aging) in plants.

2. **Location of Synthesis**: The synthesis of cytokinins occurs primarily in the plant's actively growing tissues. This includes areas where cell division is taking place, known as meristematic regions.

3. **Identifying the Main Site of Synthesis**: The roots are the main site of cytokinin synthesis. This is because the roots contain the meristematic tissues that are responsible for growth and development.

4. **Translocation of Cytokinins**: After synthesis in the roots, cytokinins are transported to other parts of the plant, particularly the shoots, through the xylem.

5. **Conclusion**: Based on the above points, the maximum synthesis of cytokinins occurs in the roots of the plant.

**Final Answer**: Cytokinin synthesis is maximum in the roots.

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