The dark reaction known as the Charpentier effect occurs at the beginning of a period of illumination.
But no special apparatus is required to show the dark reaction.
There is also a dark reaction of very short duration at the end of a period of illumination.
dark reaction |
Any of the chemical reactions that take place during the second stage of photosynthesis and do not require light. During the dark reactions, energy released from ATP (created by the light reactions) drives the fixation of carbon from carbon dioxide in organic molecules. The Calvin cycle forms part of the dark reactions. As long as ATP is available, the dark reactions can occur in darkness or in light. Compare light reaction. See more at Calvin cycle, photosynthesis.