Both C3 and C4 plants fix energy from sunlight. C3 plants have denser topology than C4 plants. It occurs in grasses, sugar cane, maize, sorghum, Amarathus and Atriplex.C 4 cycle is the alternate pathway of Calvin cycle (C 3 cycle) taking place during dark phase of photosynthesis. Photosynthesis is the process that plants use to turn light, carbon dioxide, and water into sugars that fuel plant growth, using the primary photosynthetic enzyme Rubisco. C3, C4 and CAM are the three different processes that plants use to fix carbon during the process of photosynthesis.Fixing carbon is the way plants remove the carbon from atmospheric carbon dioxide and turn it into organic molecules like carbohydrates. The carbohydrate product of both C3 and C4 cycle is a three-carbon sugar phosphate molecule known as Glyceraldehyde 3 phosphate (G3P). C 4 plants: The plants exhibiting C4 pathway are called C4 plants. They are highly proteinaceous than the C4 plants. C 4 plants live in hot moist or arid and nonsaline habitats. C4 plants are less than C3 but they are efficient in carrying out the process of photosynthesis. C3, C4, and CAM plants. Sort by: Top Voted. C3 plants provide a higher amount of protein than the C4 plants. Biology is brought to you with support from the Amgen Foundation. “That means that C4 plants are typically better adapted to hot weather and drought just because of that simple process of closing off the stomata and restricting gas exchange,” says Brenzil. Species: Cactuses and other succulents, Clusia, tequila agave, pineapple. The main difference between C3, C4 and CAM plants is the way these plants minimize water loss. RuBP can accept CO2 in both C3 and C4 plants. Definition of C4 pathway or Hatch and Slack pathway. Photorespiration. The examples of annual C3 plants are wheat, oats, and rye and the perennial plants include fescues, ryegrass, and orchardgrass. The C3 plants can be perennial or annual. 7. Practice: Photorespiration. Some C4 plants also function at least partially in C3 or C4 mode. Unlike C4 plants, C3 plants reduce into carbon dioxide directly in the chloroplast. 6. The difference between C3 and C4 plants. 4. Photorespiration. C4 plants are more productive in hot and dry climates than C3 products because they use 3-fold less water and can grow in conditions of drought or high temperature. Both C3 and C4 plants require 6 molecules of CO2 and 12 molecules of water to synthesis one molecule of glucose. 5. This is the currently selected item. Difference between C3 and C4 Cycles of Photosynthesis in Plants Calvin Cycles vs Hatch and Slack Cycle Photosynthesis is one of the vital events in the earth in which the green plants fix the energy from the sunlight and synthesis nutrients with carbon dioxide and water. 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