This 3 minute tutorial discusses the differences between the three types of photosynthesis: C3, C4 and CAM. However, H2O is also lost at the same time when stoma is opened. CAM plants are C4 so hold the CO2 taken in while the stomata are open. Maize (Zea mays, Poaceae) is the most widely cultivated C 4 plant.C 4 plants use the C 4 carbon fixation pathway to increase their photosynthetic efficiency by reducing or suppressing photorespiration, which mainly occurs under low atmospheric CO 2 concentration, high light, high temperature, drought, and salinity. The difference is that the stomata are open at night to have a controlled release of water vapor to drive the upward pull of water and dissolved nutrients in transpiration. Photosynthesis is, broadly speaking, a process that takes energy from light and produces sugar molecules out of water and carbon dioxide ([math]CO_2[/math]). C4 plants relocate the CO2 molecules to minimize photorespiration while CAM plants choose when to extract CO2 from the environment. They differ from C4 plants in that they use the C4 pathway at night and the C3 pathway during the day within the same cells. The main difference between C3 C4 and CAM photosynthesis is that C3 photosynthesis produces a three-carbon compound via the Calvin cycle, and C4 photosynthesis produces an intermediate four-carbon compound, which split into a three-carbon compound for the Calvin cycle, whereas CAM photosynthesis gathers sunlight during the day and fix carbon dioxide at night. The C4 plants avoid moving the CO2 molecules into the bundles where … The additional C4 step holds CO2. The primary difference between C4 and CAM plants transfer the CO2 molecules to lessen photorespiration while CAM plants choose when to extract CO2 from the environment. Crassulacean Acid Metabolism plants (CAM plants) also use C3 and C4 cycles for CO2 fixation. All of these plants are able to adapt to arid, high heat and light environmental conditions. In the day, these high levels of CO2 drive the Calvin cycle and minimize photorespiration. The main difference between C4 and CAM plants is the way they minimize water loss. https://www.khanacademy.org › ... › a › c3-c4-and-cam-plants-agriculture Photorespiration is a process that occurs in plants where oxygen is … The main difference between C3, C4 and CAM plants is the way these plants minimize water loss. But when the photosynthetic plant, prior going to the C3 pathway, produces oxaloacetic acid (OAA) or 4 -carbon compound as their first stable product is called as C4 or Hatch and Slack pathway.But when the plants absorb the energy of the sunlight at the day time and use this energy for the assimilation or fixing the carbon dioxide at night time is called as crassulacean acid metabolism or CAM. In C4 plants, the two pathways take place in different cells. 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