which condition causes a guard cell to become turgid
All Answers (17) The opening and the closing of the stomata depend upon the necessity of the plant to lose water and heat through transpiration (exit of water vapor means elimination of heat). When the plant has excessive water the guard cells become turgid and the ostiole opens. When little water is available the guard cells become flaccid and the ostiole closes. Water enters and goes out the stomata by osmosis. Other factors like light intensity and carbon dioxide concentration in the leaves influence the opening and the closing of the stomata.