The opening and closing of a plant's stomata are regulated by the flow of _____________ ions:

Question

Quizplus · Accepted Answer

The opening and closing of plant stomata are regulated by the movement of potassium ions. When potassium ions accumulate in the guard cells surrounding the stomata, water follows causing the guard cells to swell and the pore to open. On the other hand, when potassium ions leave the guard cells, water also exits with them resulting in the shrinking of the guard cells and ultimately the closing of the stomata.

The Opening and Closing of a Plant's Stomata Are Regulated