In eukaryotes, the dark reactions take place in the stroma of the chloroplast by one of two pathways, according to whether the plant is a C3 PLANT or a C4 PLANT.

• 在真核生物中，暗反应是在叶绿体基质中进行的，根据植物是C3植物还是C4植物而分为不同的两条途径。