What is the meaning of the dark phase of photosynthesis?

The phrase “dark reactions” is most often used as another name for light-independent reactions, more commonly referred to (as Jenny Humphrey notes) the Calvin cycle. These reactions take place in the chloroplast stroma, outside the thylakoid membrane. The Calvin cycle uses NADP from light-dependent reactions to feed fuel to successive stages of carbon fixation, reduction and regeneration of ribulose 1,5-bisphosphate.

The reason the Calvin cycle and its associated pathways are called light-independent reactions is because they don’t need light.



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