Botany - Photosynthesis in Higher Plants Question with Solution | TestHub

The opening of the stomata is related to the influx of the ${\mathrm{K}}^{+}$ions into the guard cells. The ${\mathrm{K}}^{+}$ions are obtained from the nearby subsidiary and epidermal cells. Due to this influx, the concentration of the ${\mathrm{K}}^{+}$ions in the guard cells. The presence of high energy ATP molecules triggers the entry of ${\mathrm{K}}^{+}$ions into the guard cells. Further, the presence of ATP also triggers the ${\mathrm{H}}^{+}$uptake by guard cell chloroplasts or mitochondria.