2. ABA receptor Guard cell Calcium channel Potassium channel Anion channel

3. receptor Guard cell Calcium channel Ca+ Potassium channel Anion channel diffusion Events that happen in the dark

4. receptor Guard cell Calcium channel Anion channel Ca+ anions Potassium channel diffusion Events that happen in the dark

5. Guard cell Potassium channel Ca+ anions + - + - + - + - depolarization Events that happen in the dark

6. Guard cell Potassium channel Ca+ anions + - + - + - + - depolarization Events that happen in the dark

7. Guard cell Potassium channel Ca+ anions K+ diffusion Events that happen in the dark

8. Guard cell Ca+ anions K+ Relatively High ion concentrantion Therefore Relatively Low water concentration Events that happen in the dark

9. Guard cell Ca+ anions K+ Therefore Relatively Low water concentration osmosis Events that happen in the dark

11. Guard cell Calcium channel Potassium channel Anion channel Potassium pump Calcium pump In absence of Abscisic acid Ca+ anions K+ Anion pump Active transport Events that happen in the light

12. In absence of Abscisic acid Ca+ anions K+ Relatively low ion concentrantion Therefore Relatively high water concentration osmosis Events that happen in the light