Stomatal Regulation Flashcards
0
Q
Stomatal conductance
A
The speed that water evaporates from the plant; inverse of stomatal resistance
1
Q
Stomatal aperture
A
The size of the stomatal opening
2
Q
Stomatal resistance
A
The force opposing the evaporation of water from the plant; inverse of stomatal conductance
3
Q
Stomatal Pore Opening:
A
- Import of Solutes
- Water Movement in
- Change in Guard Cell shape
4
Q
Stomatal Pore Closing:
A
- Export of Solutes
- Water movement out
- change in Guard Cell shape
5
Q
Signal for Stomatal Opening-Closing:
A
ABA abscisic acid
6
Q
Stomatal Closing: Diagram
A
ABA binds to receptor
-Ca2+ imports and K+ is blocked
-Cl- and K+ move out
In some cases Ca2+, Cl- and K+ move out of Vacuole
7
Q
Conditions to Open
A
- Light
- Low CO2
- Moderate Temperature
- Sufficient Water
8
Q
Conditions to Close
A
- Darkness
- High CO2
- Extreme Temperature
- Water Deficit
