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प्रश्न
Under what conditions are C4 plants superior to C3?
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उत्तर
C4 plants are superior to C3 plants under the following conditions:
C4 plants can perform photosynthesis at low CO2 concentrations. C4 plants show saturation at about 360 L – 1, while C3 plants show saturation only beyond 450 L – 1. This means that the availability of CO2 is a limiting factor for C3 plants; which is not the case with C4 plants. C4 plants show a higher temperature optimum but C3 plants show a lower temperature optimum. So, C4 plants can carry on photosynthesis even at high temperatures; which is not the case with C3 plants. C4 plants are not affected by high oxygen levels in the atmosphere because the plants are not affected by Kranz’s anatomy. Kranz’s anatomy ensures that photorespiration does not take place in C4 plants. But this is not the case with C3 plants.
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संबंधित प्रश्न
RuBisCo is an enzyme that acts both as a carboxylase and oxygenase. Why do you think RuBisCo carries out more carboxylation in C4 plants?
Give a comparison between the following:
C3 and C4 pathways
In the maize plant, \[\ce{CO2}\] fixation occurs in both mesophyll and bundle sheath cells. The enzymes involved in these cells for the process respectively are, ______.
In case of C4 pathway, the first step is
The first stable product of CO2 fixation in sorghum is ______.
The first stable product of CO2 fixation in sorghum is ______
PEP is primary CO2 acceptor in ______.
The enzyme that is not found in a C3 plant is ______.
Can girdling experiments be done in monocots? If yes, How? If no, why not?
Some of these terms/chemicals are associated with the C4 cycle. Explain.
Hatch slack pathway
Some of these terms/chemicals are associated with the C4 cycle. Explain.
Calvin cycle
Some of these terms/chemicals are associated with the C4 cycle. Explain.
Bundle sheath cells
Succulents are known to keep their stomata closed during the day to check transpiration. How do they meet their photosynthetic CO2 requirements?
In what kind of plants do you come across ‘Kranz’ anatomy? To which conditions are those plants better adapted? How are these plants better adapted than the plants which lack this anatomy?
What special anatomical features are displayed by leaves of C4 plants? How do they provide advantage over the structure of C3 plants?
Which of the following statements about RuBisCO is true?
