question_answer

Which one gives the most valid and recent explanation for stomatal movements? [NEET [C] 2015]

A) Transpiration

B) Potassium influx and efflux

C) Starch hydrolysis

D) Guard cell photosynthesis

Correct Answer: B

Solution :

[B] Levitt in 1954 proposed active potassium transport theory, which is the most valid and recent explanation for stomatal movements. It is explained below as: It has been proved that the accumulation of \[{{K}^{+}}\]  ion brings the opening of stomata and loss \[{{K}^{+}}\]  ions, the closing of stomata.