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What is photorespiration? Explain the photorespiration pathway in the plants.

Answer»

Photorespiration is a respiratory process in many higher plants. This is also known as the oxidative photosynthetic,  or C2 photosynthesis or carbon cycle.  

  • Photorespiration is a wasteful pathway that occurs when the Calvin cycle enzyme rubisco acts on oxygen rather than carbon dioxide.  
  • The majority of plants are C3​ plants, which have no special features to combat photorespiration.  
  • Plants minimize photorespiration by separating initial CO2​ fixation and the Calvin cycle in space, performing these steps in different cell types.
  • Crassulacean acid metabolism (CAM) plants minimize photorespiration and save water by separating these steps in time, between night and day.


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