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प्रश्न
Succulents are known to keep their stomata closed during the day to check transpiration. How do they meet their photosynthetic CO2 requirements?
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उत्तर
Succulent (water-storing) plants such as cacti and euphorbias fix CO2 into the organic compounds using PEP carboxylase at night when the stomata are open.
\[\ce{PEP + CO2 -> OAA}\]
\[\ce{OAA ->[Conversion] Malic acid}\]
The. organic compound (malic acid) accumulates throughout the night and is decarboxylated during the day to produce CO2.
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संबंधित प्रश्न
By looking at a plant externally can you tell whether a plant is C3 or C4? Why and how?
Give a comparison between the following:
C3 and C4 pathways
Give comparison between the following:
Anatomy of leaf in C3 and C4 plants
The first stable product of CO2 fixation in sorghum is ______.
PEP is primary CO2 acceptor in ______.
When CO2 is added to PEP, the first stable product synthesised is ______.
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.
PEP carboxylase
Some of these terms/chemicals are associated with the C4 cycle. Explain.
Bundle sheath cells
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?
Observe the diagram and answer the following.
- Which group of plants exibits these two types of cells?
- What is the first product of C4 cycle?
- Which enzyme is there in bundle sheath cells and mesophyll cells?
Under what conditions are C4 plants superior to C3?
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?
