Respiration that is initiated in chloroplasts and occurs in light only is called photorespiration. Photorespiration or Glycolate Pathway: It is interesting to know that in the plants possessing Calvin cycle, the enzyme RuBP carboxylase can initiate the reversal of photosynthetic reactions. This process occurs when there is low CO2, concentration but high O2, concentration. At mid-day, when temperature and CO2 [...]
In this article we will discuss about the Hatch-Slack (C4) pathway of co2 fixation. The discovery of C4 cycle in monocots such as sugarcane, maize and sorghum has indicated that these plants have solved the problem of photorespiration. The carbon dioxide is fixed in the mesophyll cells. The initial product being a-4 carbon compound, the process is called C4 pathway [...]
The upcoming discussion will update you about the difference between c3 plants and c4 plants. Difference # C3 Plants: 1. CO2 acceptor is RuBP (Ribulose bisphosphate). 2. Only one type of chloroplasts occur in the cells. Grana present in chloroplasts. 3. First stable compound after CO2 fixation is PGA. 4. Plants photosynthesize well, if CO2 concentration is high. 5. They [...]