3. How would stomata closure affect photosynthesis?

CO2 used during photosynthesis first must pass through stomata into internal spaces within the leaf. It then diffuses into mesophyll cells where it becomes available for photosynthesis.


When the stomata close, CO2 levels drop rapidly within the leaf, inhibiting the light-independent reactions. This then causes photosynthesis to stop.

3a. How would an O2 evolution curve appear if the stomata of a leaf began to close during an experiment? (Click on letter to select line.)


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Copyright (C) 1998, Steven R. Spilatro, spilatrs@marietta.edu. All rights reserved