Levitt explanation for stomatal action is due to

Options

A. Increase in sugar content of guard cells
B. Variations in pH value
C. Starch is converted into organic acids
D. Light causes opening and darkness closure

Answer

C

Explanation

Levitt theory in 1974 explains that in the presence of light starch content of the guard cells disappear and converted into organic acid particularly phosphoenol pyruvic acid.