Stomatal opening in plants occurs due to influx of

Step-by-step solution

It has been now experimentally proved that opening of stomata is an energy consuming process and not closing. The turgidity of guard cells is usually controalled by K ⁺, Cl ⁻ and H ⁺ . The opening of stomata is initiated by excretion of H ⁺ by guard cells, intake of K ⁺ and Cl ⁻ and closing is controlled by abscisic acid.