Photorespiration is a plant metabolic process that primarily occurs in the cells of the leaves. It is considered a wasteful pathway that competes with photosynthesis, potentially impacting plant growth and productivity. This process is triggered under conditions where the concentration of carbon dioxide (CO2) is low and the concentration of oxygen (O2) is high.
Photorespiration is a metabolic process that occurs during the Calvin cycle, also known as the C2 Cycle. The enzyme RuBisCO plays a significant role in photorespiration. This process is particularly important in C3 plants as a mechanism to manage the inefficiencies of RuBisCO.
During photorespiration, oxygen (O2) is utilized, and carbon dioxide (CO2) is released in the presence of light. It shares similarities with the process of respiration, where O2 is consumed, and CO2 is produced.
Three cell organelles are implicated in photorespiration:
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Test: Dark Reactions (Photosynthesis)
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Introduction of Photorespiration
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1. What is photorespiration? | ![]() |
2. Why does photorespiration occur? | ![]() |
3. How does photorespiration affect plant growth? | ![]() |
4. Can plants adapt to reduce photorespiration? | ![]() |
5. What environmental factors can influence photorespiration? | ![]() |