Elements involved in opening and closing of stomata is

Options

A. Zn
B. Mg
C. K
D. Fe

Answer

**Step-by-Step Solution:**

1. **Identify the Elements Involved**: The primary elements involved in the opening and closing of stomata are potassium, zinc, magnesium, and iron.

2. **Role of Potassium**: Potassium plays a crucial role in the process. It is absorbed by the plant from the soil in the form of potassium ions (K+).

3. **Function of Potassium**: Potassium ions help in maintaining the balance of anions and cations within the plant cells. This balance is essential for various physiological processes.

4. **Protein Synthesis**: Potassium is involved in protein synthesis, which is vital for the growth and functioning of plant cells.

5. **Activation of Enzymes**: Potassium also activates certain enzymes that are necessary for the biochemical processes involved in stomatal movement.

6. **Maintenance of Cell Turgidity**: The presence of potassium ions helps maintain cell turgidity, which is important for the opening and closing of stomata. When guard cells take up potassium, they swell and cause the stomata to open. Conversely, when potassium is lost, the guard cells lose turgidity and the stomata close.

7. **Conclusion**: Therefore, potassium is the key element that facilitates the opening and closing of stomata, along with the supportive roles of zinc, magnesium, and iron.

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