Dark reaction / Calvin cycle
Dark reaction or biosynthetic phase in photosynthesis is an anabolic reaction in which a six-carbon compound, glucose, is formed. These reactions are independent of the presence or absence of light energy.Using the assimilatory energy of ATP and NADPH, that are produced during light energy, glucose is prepared during dark reaction by reduction of carbon dioxide.
Stroma of chloroplast
The stroma in the granular chloroplast matrix that contains the grana. The dark reaction of photosynthesis occurs in this region.