The reduction of CO2 to organic compounds by living organisms—classically equated to photosynthesis, which requires sunlight and H2O as an electron donor, converting inorganic carbon (CO2) into organic compounds.
Succinyl-CoA is converted to acetyl-CoA that is fed back into the cycle, with the net result of generating glyoxylate as the carbon fixation product, which is converted to pyruvate (Herter et al., 2002).
In C3 plants, respiration rates increase in the light, a process termed photorespiration, and this increased use of photosynthesis decreases the efficiency of carbon fixation. The first contact of C[O.sub.2] with enzymes after entering the leaves is at the spongy parenchyma, where PEP carboxylase predominates.
Although Moso bamboo stand stored a lower amount of carbon in the vegetation floor than Chinese fir and Masson pine stands (Table 5), the annual carbon fixation amount in Moso bamboo stand was greater than that in Chinese fir and Masson pine stands.
The results showed that it is missing the entire set of genes needed for photosystem II and carbon fixation, essential parts of the molecular machinery that carries out photosynthesis in plants and cyanobacteria.