Stomata Guard Cell Simulator
Adjust environmental conditions and watch guard cells control the stomatal pore
Stomatal Metrics
5.0
Aperture (µm)
High
Turgor pressure
Mod
Transpiration
Mod
CO₂ uptake
K⁺ uptake moderate
Epidermis Cross-Section
Guard cell Guard cell Water vapour out CO₂ in
Homeostatic Priority
Balanced
Current priority
The trade-off:
Open stomata allow CO₂ uptake for photosynthesis but increase water loss via transpiration.
At moderate light and humidity with adequate water, guard cells are turgid — K⁺ ions accumulate by active transport, water follows by osmosis, and the stomatal pore is partially open.
Light intensity Moderate
Relative humidity 60%
Soil water Adequate