The element which plays an important role in stomatal movement and its deficiency causes mottled chlorides is

Options

A. `Mg^(2+)`
B. N
C. P
D. `K^(+)`

Answer

**Step-by-Step Solution:**

1. **Identify the Role of the Element**: The question asks for an element that plays a significant role in stomatal movement, which refers to the opening and closing of stomata in plants.

2. **Understand Stomatal Movement**: Stomata are small openings on the surfaces of leaves that allow for gas exchange. The movement of these stomata is crucial for processes like photosynthesis and transpiration.

3. **Determine the Element**: The element that is known to be involved in the regulation of stomatal movement is Potassium (K). Potassium ions (K+) are essential for the functioning of guard cells, which control the opening and closing of stomata.

4. **Recognize the Deficiency Symptoms**: The question also mentions that the deficiency of this element causes mottled chlorosis, which is a condition characterized by yellowing of leaf tissue. Potassium deficiency leads to symptoms such as scorched leaf tips and mottled chlorosis.

5. **Conclude the Answer**: Based on the roles and deficiency symptoms discussed, the element that plays an important role in stomatal movement and whose deficiency causes mottled chlorosis is Potassium.

**Final Answer**: Potassium (K)

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