Maximum concentration of cytokinins occurs in

Options

A. Growing embryos and fruits
B. Apical buds
C. Lateral buds and fruits
D. Root tips

Answer

**Step-by-Step Solution:**

1. **Understanding Cytokinins**: Cytokinins are a class of plant hormones that play a crucial role in promoting cell division and growth in plants. They are involved in various physiological processes, including shoot and root development, leaf expansion, and delaying senescence (aging) of leaves.

2. **Identifying Sources of Cytokinins**: Cytokinins are primarily synthesized in actively growing tissues of plants. The main sites of synthesis include young leaves, roots, seeds, and fruits.

3. **Analyzing the Options**:
- **Option 1: Growing embryos and fruits**: These are young and actively growing parts of the plant, which are likely to have a high concentration of cytokinins due to their role in promoting growth and development.
- **Option 2: Apical buds**: While apical buds do contain cytokinins, they are not the primary site of maximum concentration.
- **Option 3: Lateral buds and fruit**: Similar to apical buds, lateral buds may have cytokinins, but they are not the main source.
- **Option 4: Root tips**: Root tips are important for growth and development but are not the primary site for maximum concentration of cytokinins.

4. **Conclusion**: Based on the information that cytokinins are synthesized in actively growing parts of the plant, the maximum concentration of cytokinins is found in growing embryos and fruits.

5. **Final Answer**: Therefore, the correct answer is **Option 1: Growing embryos and fruits**.

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