what is c4 photosynthesis
C4 Photosynthesis. In this type of photosynthesis environmental CO2 is first incorporated into 4-carbon acids in cells known as mesophylls. These acids are transported to other cells known as bundle sheath cells.n hot and dry environments C4 photosynthesis is more efficient than C3 photosynthesis. This is due to two reasons. The first one is that the system does not undergo photorespiration, a process that runs counter to photosynthesis (see below).