brighter the light = greater the transpiration rate, stomata closes as it gets darker meaning photosynthesis can't happen so co2 doesn't need to be let in. therefore very little water can escape
what shape are guard cells?
kidney shape
what happens when plants have a lot of water?
guard cells fill with water and go plump and turgid - this makes the stomata open so gases can be exchanged for photosynthesis
what happens when the plant is short of water?
guard cells loose water and become flaccid - making the stomata close - this helps stop water vapour from escaping
what are guard cells adapted for?
for gas exchange and controlling water loss within a leaf