
Tabulate any four differences between C3 and C4 plants.
Answer
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Hint: In C3 plants, the initial product is 3-phosphoglycerate with 3 carbon atoms. These plants are also known as temperate plants. These plants reduce carbon dioxide directly in the chloroplast.C4 plants are plants that cycle carbon dioxide to 4-carbon sugar compounds in order to enter the C3 or the Calvin cycle.
Complete answer:
Note: The C3 pathway is also called the Calvin pathway. The C4 pathway is also gone by the name the Hatch -Slack pathway. In C3 plants, the first product of photosynthesis is a 3 carbon compound i.e., phosphoglyceric acid (PGA) whereas in C4 plants, plants where the first product of photosynthesis is a 4 carbon compound i.e., oxaloacetic acid (OAA).
Complete answer:
C3 Plants | C4 Plants |
The first stable intermediate product is 3- carbon acid:- phosphoglyceric acid(PGA). | The first stable intermediate product is a 4 carbon acid:- oxaloacetate (OAA). |
Photosynthetic functions occur only in mesophyll cells – on the surface of the leaves | Photosynthetic functions occur in mesophyll and bundle sheath cells. |
C3 requires cool and wet environments. | C4 requires tropical and dry environments. |
95% of the green plants are C3 plants. | 5% of the green plants are C4 plants. |
Examples include rice, wheat, oats, barley, cotton, sugar beets, soybeans, and spinach | Examples include Maize, Sugarcane, pearl millet, and sorghum. |
C3 Plants are common in temperate climates. | C4 plants are common in tropical climates. |
C3 plants exhibit a granal type of chloroplast. | C4 plants exhibit both types of the chloroplast, granal as well as agranal. |
Carbon dioxide fixation occurs only once. | Carbon dioxide fixation occurs twice. |
Leaves lack Kranz anatomy. | Leaves possess Kranz anatomy. |
The optimum temperature for photosynthesis is comparatively lower than that of C4 plants. | The optimum temperature for photosynthesis is higher than C3 plants. |
C3 photosynthesis is the oldest and the most common . | C4 photosynthesis is a recent phenomenon, emerging after C3 photosynthesis. |
Photorespiration is not suppressed | Photorespiration is suppressed |
Carbon dioxide fixation is slow. | Carbon dioxide fixation is faster. |
Photosynthesis occurs when stomata are open | Photosynthesis occurs even when stomata are closed. |
Note: The C3 pathway is also called the Calvin pathway. The C4 pathway is also gone by the name the Hatch -Slack pathway. In C3 plants, the first product of photosynthesis is a 3 carbon compound i.e., phosphoglyceric acid (PGA) whereas in C4 plants, plants where the first product of photosynthesis is a 4 carbon compound i.e., oxaloacetic acid (OAA).
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