The upcoming discussion will update you about the Relationship between C4 and CAM. A similarity between the carbon fixation mechanism in C4 and CAM has been noted. Laetsch (1974) has reviewed the relationship and suggested a model for spatial and temporal compartmentalization of carbon fixation in C4 and CAM (Fig. 8.29). In CAM-type photosynthesis, C4 acid is produced by primary [...]
The below mentioned article provides a notes on Control of Photorespiration. Photorespiration is apparently a wasteful process because quite a large amount of recently fixed carbon is lost by re-oxidation to CO2. Lorimer and Andrews in 1973 suggested that oxygenation of RuBP is unavoidable because with the present gaseous composition of the atmosphere, photosynthesis via the C3 cycle is obligatorily [...]
The below mentioned article provides a summary on Co2 Concentrating Mechanisms in CO2 Fixation Pathways. When the terrestrial plants first appeared in the ancient geologic time, the atmospheric CO2 concentration was several fold higher than today. Ultimately, the CO2 concentration became reduced to the present low values. It is believed that the relative abundance of land plants was mainly responsible [...]