Which one gives the most valid and recent explanation for stomatal movements ?
Options
(a) Potassium influx and efflux
(b) Starch hydrolysis
(c) Guard cell photosynthesis
(d) Transpiration
Correct Answer:
Potassium influx and efflux
Explanation:
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 to open the pores of stomata found on the surface of leaves.