Advertisements
Advertisements
प्रश्न
Under what conditions are C4 plants superior to C3?
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.
APPEARS IN
संबंधित प्रश्न
By looking at a plant externally can you tell whether a plant is C3 or C4? Why and how?
In case of C4 pathway, the first step is
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.
Calvin cycle
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?
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?
