The flow of K⁺ and Cl^- into guard cells is facilitated by

Question

Quizplus · Accepted Answer

The flow of K+ and Cl- ions into guard cells is facilitated by the outflow of protons from the guard cells. This is because the proton pumps in the plasma membrane of guard cells use ATP energy to pump protons out of the guard cells, creating a negative charge and a negative water potential inside the cells. This negative water potential drives the influx of K+ and Cl- ions into the guard cells through specific ion channels. The influx of K+ and Cl- ions increases the solute concentration and osmotic pressure of the guard cells, leading to water uptake and swelling of the cells, which causes stomatal opening.

The Flow of K+ and Cl- into Guard Cells Is

The Flow of K⁺ and Cl^- into Guard Cells Is