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प्रश्न
By looking at which internal structure of a plant can you tell whether a plant is C3 or C4? Explain.
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उत्तर
The leaves of C4 plants have a special anatomy called Kranz anatomy. This makes them different from C3 plants. Special cells, known as bundle-sheath cells, surround the vascular bundles. These cells have a large number of chloroplasts. They are thick-walled and have no intercellular spaces. They are also impervious to gaseous exchange. All these anatomical features help prevent photorespiration in C4 plants, thereby increasing their ability to photosynthesise.
Cross section of a leaf of a C4 plant
The anatomy of the leaves of C3 plants is not of the Kranz type. Pillar tissue is found in the mesophyll in its leaves. same type of chlorophyll was found in all the cells. Let's go. Both pigment systems are found in the photosynthesis system.
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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?
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 C4-pathway initial carbon dioxide fixation occurs in chloroplasts of ______.
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 ______.
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?
A cyclic process is occurring in C3 plant, which is light dependent, and needs O2. This process doesn’t produce energy rather it consumes energy.
- Can you name the given process?
- Is it essential for survival?
- What are the end products of this process?
- Where does it occur?
What special anatomical features are displayed by leaves of C4 plants? How do they provide advantage over the structure of C3 plants?
Name the two important enzymes of C4 pathway, and explain their role in fixing CO2?
