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Photorespiration is a process of metabolic pathway that consumes oxygen, releases carbon dioxide, generates no ATP, and decreases photosynthetic output; generally occurs on hot, dry, bright days, when stomata close and the oxygen concentration in the leaf exceeds that of carbon dioxide.
Photorespirationoccurs because Rubisco can utilize O2 as a substrate instead of CO2. It means when stomata partially close on hot day, dry day, CO2 levels drop as COÂ2 is consumed in the Calvin cycle. At the same time, O2 levels rise as the light reaction converts light to chemical energy. When the OÂÂ2:CO2 ratio increase, there is not enough COÂ2 and rubisco can add O2 to Calvin cycle (RuBP). Therefore, photorespiration consumes O2 and organic fuel and releases CO2 without producing ATP or sugar. Photorespiration reduces net C fixation considerably. Photorespiration also uses ATP & NADPH.
photorespiration is absent in c4 plants but present in c3 plants.It is because c4 plants are present in dry areas.
What else can I help you with?
What is photorespiration?
Photorespiration is a process in plants that occurs when rubisco, the enzyme responsible for carbon fixation, uses oxygen instead of carbon dioxide. This can happen in hot or dry conditions, leading to a wasteful process that reduces the efficiency of photosynthesis. Photorespiration can lower the productivity of plants.
In which cell would you expect photorespiration?
Photorespiration typically occurs in mesophyll cells of plant leaves, where the enzyme rubisco can mistakenly use oxygen instead of carbon dioxide for the initial steps of photosynthesis.
What is the loss of carbon-fixing activity of the enzyme RuBP carboxylase directly proportional to?
The loss of carbon-fixing activity of the enzyme RuBP carboxylase is directly proportional to the rate of photorespiration in the plant. As photorespiration increases, the enzyme's efficiency in fixing carbon dioxide decreases, leading to reduced photosynthetic productivity.
What is the name of the process wherein co2 is released without the production of atp or nadph?
The process you are referring to is called photorespiration. It is a metabolic pathway that releases CO2 without producing ATP or NADPH and occurs in plants when the Calvin cycle is inhibited.
How do bad odor help a plant to survive?
Bad odors can deter herbivores or pests from feeding on the plant, protecting it from damage. Additionally, some bad odors can attract predators or parasites that feed on the herbivores, providing a natural defense mechanism for the plant.
Function of plant mitochondria?
Respiration is the main. Also involve in photorespiration
What does the peroxisome do for the plant cell?
They break down H2O2 into water.Engage in the photorespiration.
What are the advantage and disadvntage of photorespiration?
Advantage: Photorespiration helps to salvage energy and prevent damage to the plant from reactive oxygen species. Disadvantage: Photorespiration decreases the efficiency of photosynthesis by wasting energy and reducing carbon fixation, ultimately leading to lower yields in plants.
Why is photorespiration wastful process?
Photorespiration is considered wasteful because it consumes energy and resources without producing useful compounds for the plant. It occurs when rubisco enzyme fixes oxygen instead of carbon dioxide, leading to the release of CO2 and consumption of ATP and reducing power. This process reduces the efficiency of photosynthesis and can limit plant growth in certain conditions.
What happens during photorespiration?
In photorespiration, O2 replaces CO2 in a non-productive, wasteful reaction. Photorespiration occurs when the CO2 levels inside a leaf become low, which happens on hot dry days when a plant is forced to close its stomata to prevent excess water loss.
What is photorespiration?
Photorespiration is a process in plants that occurs when rubisco, the enzyme responsible for carbon fixation, uses oxygen instead of carbon dioxide. This can happen in hot or dry conditions, leading to a wasteful process that reduces the efficiency of photosynthesis. Photorespiration can lower the productivity of plants.
What organisms have the greatest problem with photorespiration?
C3 plants, such as wheat, rice, and soybeans, have the greatest problem with photorespiration due to the inefficiency of the enzyme RuBisCO at fixing carbon dioxide. This leads to loss of energy and resources in the plant.
In which cell would you expect photorespiration?
Photorespiration typically occurs in mesophyll cells of plant leaves, where the enzyme rubisco can mistakenly use oxygen instead of carbon dioxide for the initial steps of photosynthesis.
What is the importance of photorespiration?
Synthesis of glysine and serine,evolution of co2,synthesis of ammonia,protects plant from photo oxidation.
What is the major consequence of photorespiration?
it lowers the efficiency of photosynthesis by removing carbon molecules from the Calvin cycle.
Where is Photorespiration located?
Photorespiration involves three different organelles--- chloroplasts, peroxisomes and mitochondria
What has the author Israel Zelitch written?
Israel Zelitch has written: 'Photosynthesis, photorespiration, and plant productivity' -- subject(s): Photosynthesis, Plants, Respiration
