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Question

Which type of plants would show higher rate of photosynthesis in low temperature and high CO2 concentration? 


  1. CAM plants 

  2. C4 plants

  3. Both C3 and C4 plants. 

  4. C3 plants


Solution

The correct option is D

C3 plants


When water supply does not restrict growth, C3 plants can accumulate dry matter more rapidly in elevated CO2 concentrations than ambient CO2 concentrations. This is primarily because the rate of net photosynthetic carbon reduction by Rubisco is increased by increased substrate availability and partly because the rate of oxygenation by Rubisco (photorespiration) is reduced.

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