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What is photorespiration and Explain how some species of plants cope with this condition C4 and CAM?
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. Photorespiration occurs 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 CO2 is consumed in the Calvin cycle. At the same time, O2 levels rise as the light reaction converts light to chemical energy. When the O2:CO2 ratio increase, there is not enough CO2 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 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. Photorespiration occurs 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 CO2 is consumed in the Calvin cycle. At the same time, O2 levels rise as the light reaction converts light to chemical energy. When the O2:CO2 ratio increase, there is not enough CO2 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.
What else can I help you with?
Can tomato plants show photo respiration?
No, tomato plants do not undergo photorespiration. Photorespiration is a process that occurs in C3 plants, where oxygen is mistakenly used instead of carbon dioxide in the initial steps of photosynthesis. However, tomato plants are classified as C4 plants, which have evolved mechanisms to minimize photorespiration.
Does photorespiration produce energy?
No, photorespiration does not produce energy. In fact, it is considered a wasteful process that occurs in plants when there is a lack of carbon dioxide and excess oxygen in the leaf cells. Photorespiration can decrease the efficiency of photosynthesis in plants.
Is photorespiration independent of light intensity?
Photorespiration is not independent of light intensity; it is suppressed at high light intensity due to the greater availability of CO2 for photosynthesis. Under low light conditions, photorespiration can become more prevalent as there is a higher ratio of oxygen to CO2 in the leaf, leading to increased oxygenation of ribulose bisphosphate.
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.
Which situation best accounts for photorespiratin in plants?
Photorespiration is more likely to occur in plants when the ratio of oxygen to carbon dioxide is high, such as in hot and dry environments. This leads to Rubisco, the enzyme involved in photosynthesis, fixing oxygen instead of carbon dioxide, resulting in the wasteful process of 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.
Can tomato plants show photo respiration?
No, tomato plants do not undergo photorespiration. Photorespiration is a process that occurs in C3 plants, where oxygen is mistakenly used instead of carbon dioxide in the initial steps of photosynthesis. However, tomato plants are classified as C4 plants, which have evolved mechanisms to minimize photorespiration.
What are some ways plants?
Plants have adapted to avoid photorespiration
What are some ways plants adapt?
Plants have adapted to avoid photorespiration
Does photorespiration produce energy?
No, photorespiration does not produce energy. In fact, it is considered a wasteful process that occurs in plants when there is a lack of carbon dioxide and excess oxygen in the leaf cells. Photorespiration can decrease the efficiency of photosynthesis in plants.
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.
How do you increase photorespiration?
There is no need to increase photorespiration . It is an injurious process for plants . It is increased by strong sun light and high temperature as it happens at mid day .It specially happens in tropical regions .
Is photorespiration independent of light intensity?
Photorespiration is not independent of light intensity; it is suppressed at high light intensity due to the greater availability of CO2 for photosynthesis. Under low light conditions, photorespiration can become more prevalent as there is a higher ratio of oxygen to CO2 in the leaf, leading to increased oxygenation of ribulose bisphosphate.
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.
Which situation best accounts for photorespiratin in plants?
Photorespiration is more likely to occur in plants when the ratio of oxygen to carbon dioxide is high, such as in hot and dry environments. This leads to Rubisco, the enzyme involved in photosynthesis, fixing oxygen instead of carbon dioxide, resulting in the wasteful process of photorespiration.
Why doesn't photorespiration occur in chemoautotrophs?
Photorespiration occurs in plants because they use oxygen in the Calvin cycle, leading to the wasteful process. Chemoautotrophs do not utilize the Calvin cycle for carbon fixation; instead, they use alternative pathways like the reductive tricarboxylic acid cycle or the 3-hydroxypropionate bi-cycle. This means that they do not produce the same conditions that lead to photorespiration as seen in plants.
Why C4 plants able to photosynthesize with no apparent photorespiration?
C4 plants have an additional carbon fixation step involving PEP carboxylase, which helps to concentrate CO2 around Rubisco, reducing the likelihood of oxygen competing with CO2 at the active site of Rubisco. This spatial separation of carbon fixation and the Calvin cycle enables C4 plants to minimize photorespiration.
