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Which one gives the most valid and recent explanation for stomatal movements?
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- Potassium influx and efflux
- Starch hydrolysis
- Guard cell photosynthesis
- Transpiration
Correct Option: A
The opening and closing of stomata are caused by influx and efflux of potassium ions (K+). The increase of K+ results in opening of stoma and decrease of K+ causes closing of stoma. The turgidity of guard cells induces the opening of the pores of stomata found on the surface of leaves.
