photorespiration
Quick Summary
Photorespiration is a light-dependent process in some plants that releases carbon dioxide and can inhibit photosynthesis. It occurs when the enzyme RuBisCO, which normally fixes carbon dioxide for photosynthesis, instead reacts with oxygen. This process is more likely to happen under conditions of high light intensity, hot weather, and limited water.1234
In C3 plants, photorespiration competes with the Calvin-Benson cycle, reducing the efficiency of sugar production. This wasteful process involves chloroplasts, peroxisomes, and mitochondria. While it can reduce photosynthetic efficiency, it may also play a role in recycling compounds within the photosynthetic pathway.23
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photosynthesisLight intensity and temperature…land plants, a process called photorespiration occurs, and its influence upon photosynthesis increases with rising temperatures. More specifically, photorespiration competes with photosynthesis and limits further increases in the rate of photosynthesis, especially if the supply of water is limited (see below Photorespiration).
Read More…land plants, a process called photorespiration occurs, and its influence upon photosynthesis increases with rising temperatures. More specifically, photorespiration competes with photosynthesis and limits further increases in the rate of photosynthesis, especially if the supply of water is limited (see below Photorespiration).
Read More- photosynthesisPhotorespiration
Under conditions of high light intensity, hot weather, and water limitation, the productivity of the Calvin-Benson cycle is limited in many plants by the occurrence of photorespiration. This process converts sugar phosphates back to carbon dioxide; it is initiated by the oxygenation of RuBP…
Read MoreUnder conditions of high light intensity, hot weather, and water limitation, the productivity of the Calvin-Benson cycle is limited in many plants by the occurrence of photorespiration. This process converts sugar phosphates back to carbon dioxide; it is initiated by the oxygenation of RuBP…
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plantSpecific variations in photosynthesis…the photorespiratory carbon-oxidation cycle, or photorespiration. (This cycle probably evolved to recycle PGA back into the photosynthetic pathway, thereby preventing an even greater loss of carbon.) Photorespiration involves three organelles (chloroplasts, peroxisomes, and mitochondria), each with unique transport mechanisms for the cycle’s intermediates.
Read More…the photorespiratory carbon-oxidation cycle, or photorespiration. (This cycle probably evolved to recycle PGA back into the photosynthetic pathway, thereby preventing an even greater loss of carbon.) Photorespiration involves three organelles (chloroplasts, peroxisomes, and mitochondria), each with unique transport mechanisms for the cycle’s intermediates.
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