Under what conditions are C4 plants superior to C3 ?
C4 plants are advantageous in following ways
(i) These plants can carry out photosynthesis even at low concentration of CO2 in the atmosphere and in the shortage of water.
(ii) These plants can tolerate high O2 concentration and temperature as enzyme PEP carboxylase in C4 cycle in insensitive to O2 and do not show - photorespiration in comparison to the C3 plants, which start process of photorespiration and lose CO2 fixation in the form of glucose molecule. Thus, C4 plants are superior to C3 plants.
