Photorespiration involves a complex network of enzyme reactions that exchange metabolites between chloroplasts, leaf peroxisomes and mitochondria. The oxygenation reaction of RuBisCO is a wasteful process because 3-phosphoglycerate is created at a lower rate and higher metabolic cost compared with RuBP carboxylase activity .

2025年1月30日 · Photorespiration is a process in plants that counteracts photosynthesis. It occurs when the enzyme RuBisCO acts on oxygen instead of carbon dioxide. This leads to the formation of a two-carbon compound, which the plant then must …

2023年2月1日 · Photorespiration, also known as oxidative photosynthetic carbon cycle or C2 photosynthesis, is a process found in normal C3 plant respiration. Here, the enzyme RuBisCO uses O 2 as a substrate instead of CO 2. This alternative pathway leads to the loss of fixed carbon, wastes energy, and decreases sugar synthesis. Factors Affecting Photorespiration

Photorespiration is initiated by the oxygenase activity of ribulose-1,5-bisphosphate-carboxylase/oxygenase (RUBISCO), the same enzyme that is also responsible for CO(2) fixation in almost all photosynthetic organisms. Phosphoglycolate formed by oxygen fixation is recycled to the Calvin cycle interme …

Photorespiration is a process that occurs in Calvin Cycle during plant metabolism. In this process, the key enzyme RuBisCO that is responsible for The fixing of carbon dioxide reacts with oxygen rather than carbon dioxide.

Photorespiration is initiated by the oxygenase activity of ribulose-1,5-bisphosphate-carboxylase/oxygenase (RUBISCO), the same enzyme that is also responsible for CO 2 fixation in almost all photosynthetic organisms.

Photorespiration is linked to photosynthesis by the dual function of ribulose-1,5-bisphosphate carboxylase/oxygenase (RubisCO). This most abundant enzyme on earth is unique in its ability to irreversibly fix atmospheric CO 2 to biomass [6].

Photorespiration is the process where the enzyme RuBisCO (EC 4.1.1.39), which fixes CO 2, interacts with O 2. When RuBisCO fixes CO 2 , two molecules of 3-phosphoglycerate (3GP) are produced. One of the 3GP can be used in central carbon metabolism to synthesize biomass components; the other is used to regenerate Ribulose 1,5-bisphosphate (Ru15P).

Photorespiration is a process in plants that occurs under hot conditions when stomata close, preventing carbon dioxide (CO 2) from entering and causing oxygen (O 2) to accumulate. This leads to the enzyme Rubisco binding O 2 to RuBP instead of CO 2, resulting in the production of CO 2 and wasting ATP and NADPH.

Photorespiration involves the production and consumption of both reducing and oxidizing equivalents influencing redox balance in the cell leading to the oxidative post-translational modifications of proteins and signalling events [132].