rubisco ↔ carbon dioxide

Relations (1)

related 2.00 — strongly supporting 3 facts

Carbon dioxide is a substrate for rubisco in photosynthetic processes, as evidenced by its release near rubisco in C4 plants [1] and the comparison of their respective affinities for carbon dioxide [2], while its uptake is a fundamental step in the CAM pathway [3].

Facts (3)

Sources

The Ecology of Photosynthetic Pathways | Learn Science at Scitable nature.com Nature 3 facts

procedureThe C4 photosynthetic process involves transferring the 4-carbon acid to bundle sheath cells, where it is decarboxylated to release carbon dioxide next to rubisco.

procedureThe CAM photosynthetic pathway proceeds as follows: (1) stomata open at night to allow carbon dioxide to diffuse into the leaf, (2) carbon dioxide is combined with PEP to form malate, (3) malate is stored in large central vacuoles until daytime, (4) during the day, malate is released from the vacuoles and decarboxylated, and (5) rubisco combines the released carbon dioxide with RuBP in the C3 pathway.

claimPhosphoenolpyruvate (PEP) carboxylase has a higher affinity for carbon dioxide than rubisco and lacks oxygenase activity.