In stomatal opening, influx of `K^(+)` is accompanied by effux of

Options

A. `Na^(+)`
B. `K^(+)`
C. `Cl^(-)`
D. `H^(+)`

Answer

To solve the question regarding the efflux that accompanies the influx of K⁺ ions during stomatal opening, we can break down the process step by step.

### Step-by-Step Solution:

1. **Understanding Stomatal Opening**: Stomata are small openings on the surfaces of leaves that regulate gas exchange. Their opening and closing are controlled by guard cells.

2. **Role of Potassium Ions (K⁺)**: During stomatal opening, potassium ions (K⁺) are actively transported into the guard cells. This influx of K⁺ ions causes the guard cells to become turgid (swollen with water), leading to the opening of the stomata.

3. **Accompanying Efflux**: As K⁺ ions enter the guard cells, there must be a compensatory movement of other ions to maintain electrical neutrality and osmotic balance.

4. **Identifying the Efflux Ion**: The video transcript mentions that the influx of K⁺ is accompanied by the efflux of H⁺ ions (protons). This means that as K⁺ ions move into the guard cells, H⁺ ions are released from the guard cells into the surrounding environment.

5. **Conclusion**: Therefore, in stomatal opening, the influx of K⁺ ions is accompanied by the efflux of H⁺ ions.

### Final Answer:
In stomatal opening, the influx of K⁺ is accompanied by the efflux of H⁺ ions.

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