Efflux of `K^(+) and Cl^-`will cause

Options

A. Closure of stamata
B. Opening of stomata
C. Increased turgidity
D. Imbibition

Answer

To solve the question regarding the efflux of potassium (K⁺) and chloride (Cl⁻) ions, we need to understand how these ions affect the stomatal movement in plants. Here’s a step-by-step breakdown:

### Step-by-Step Solution:

1. **Understanding Stomatal Movement**: Stomata are small openings on the surfaces of leaves that regulate gas exchange. Their opening and closing are controlled by guard cells, which respond to the concentration of ions, particularly potassium (K⁺) and chloride (Cl⁻).

**Hint**: Remember that stomatal movement is closely linked to the concentration of ions in guard cells.

2. **Role of Potassium and Chloride Ions**: When potassium and chloride ions enter the guard cells (influx), it causes water to enter the cells by osmosis, leading to turgidity and the opening of the stomata. Conversely, when these ions leave the guard cells (efflux), it causes water to exit the cells, leading to a loss of turgidity and the closing of the stomata.

**Hint**: Think about how water movement is influenced by ion concentration in guard cells.

3. **Analyzing the Options**:
- **Closure of Stomata**: This is the correct answer. The efflux of K⁺ and Cl⁻ ions leads to the closure of stomata.
- **Opening of Stomata**: This is incorrect as it occurs due to the influx of these ions.
- **Increased Turgidity**: This is also incorrect since increased turgidity happens with the influx of ions, not efflux.
- **Imbibition Process**: This is not directly related to the efflux of K⁺ and Cl⁻ ions and is therefore incorrect.

**Hint**: Evaluate each option based on the relationship between ion movement and stomatal behavior.

4. **Conclusion**: Based on the analysis, the efflux of potassium and chloride ions will cause the closure of stomata.

**Final Answer**: The correct answer is **A. Closure of Stomata**.