Term
| What do guard cells regulate? |
|
Definition
| gas exchange and transpiration |
|
|
Term
|
Definition
| low concentration of carbon dioxide in the leaf |
|
|
Term
| What makes stomata close? |
|
Definition
| water loss and high temperature |
|
|
Term
Process of Stomatal Opening
- Trigger, such as light or low [CO2]
- ___________ ion carriers in guard cell membrane become active.
- Increase in [K+] by ___ times
- Negative ______ and _______ ions are brought into the cell to counterbalance the positive charge.
- High ionic concentration = low concentration of ______
- _________ moves into guard cell vacuoles.
- Guard cells expand and change shape
- Stoma opens
|
|
Definition
| Potassium, six, chlorine, malate, water, water |
|
|
Term
| What features of guard cells constrain their change in shape? |
|
Definition
- inflexible cellulose
- guard cells attached at the ends
- proximity to rigid epidermal cells
|
|
|
Term
hormone that signals closing of stomata |
|
Definition
|
|
Term
| when there is not enough water in the soil, this causes the release of abscisic acid from the roots |
|
Definition
|
|
