Guard cells control transpiration by closing stomata in response to hormones like ABA, which is released during dehydration, causing potassium efflux and loss of turgor.
Guard cells control transpiration by closing stomata in response to hormones like ABA, which is released during dehydration, causing potassium efflux and loss of turgor.
| Front | regulating leaf transpiration rate |
|---|---|
| Back | guard cells flank the stomata, become flaccid in response to ABA hormone from dehydrated mesophyll cells, ABA triggers potassium efflux causing loss of turgor (water pressure), stomatal pore closes |
Tags: 9_1_xylem_transport
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