dark reactions

(redirected from light-independent reactions)
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dark reactions

Any enzymatically mediated chemical reaction that takes place in the absence of light. One example is the series of light-independent reactions that produce glucose from carbon dioxide and cellular energy sources.

dark reactions

or

light-independent reactions

those processes in PHOTOSYNTHESIS that do not require light energy but which can occur in both light and dark conditions; the reactions involve the reduction of carbon dioxide to carbohydrate in the CALVIN CYCLE using ATP and NADPH2 formed in the LIGHT REACTIONS.
References in periodicals archive ?
The next element in the process is to examine the light-independent reactions.
Once produced, these energy-rich compounds must then migrate to the energy transfer point in the leaf and release their energy to drive the light-independent reactions or dark reaction in the chloroplast stoma to convert carbon dioxide into glucose through a complex series of reactions that all first-year biology students learn as the Calvin Benson cycle.
The light-independent reaction takes considerably longer to occur because it involves migration of the components from the site of production to the site of use.