Difference Between C3 And C4 Plants Pdf

difference between c3 and c4 plants pdf

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The assimilation of carbon dioxide from the sunlight, for the process of photosynthesis and then converting it to glucose energy synthesizing different product is the key difference between the three. So during the CO2 fixation, when the photosynthetic plants produce 3-phosphoglyceric acid PGA or 3- carbon acid as the first product is called C3 pathway.

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Both C3 and C4 are types of dark reactions of photosynthesis. Both C3 and C4 plants fix energy from sunlight. Both C3 and C4 plants synthesize carbohydrates. Both C3 and C4 plants require 6 molecules of CO2 and 12 molecules of water to synthesis one molecule of glucose. The carbohydrate product of both C3 and C4 cycle is a three-carbon sugar phosphate molecules called Glyceraldehyde 3 phosphate G3P.

Photosynthesis is the process that plants use to turn light, carbon dioxide, and water into sugars that fuel plant growth, using the primary photosynthetic enzyme Rubisco. The majority of plant species on Earth uses C3 photosynthesis, in which the first carbon compound produced contains three carbon atoms. In this process, carbon dioxide enters a plant through its stomata microscopic pores on plant leaves , where amidst a series of complex reactions, the enzyme Rubisco fixes carbon into sugar through the Calvin-Benson cycle. However, two key restrictions slow down photosynthesis. However, plants have evolved another form of photosynthesis to help reduce these losses in hot, dry environments.

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C 4 carbon fixation or the Hatch—Slack pathway is one of three known photosynthetic processes of carbon fixation in plants. It owes the names to the discovery by Marshall Davidson Hatch and Charles Roger Slack [1] that some plants, when supplied with 14 CO 2 , incorporate the 14 C label into four-carbon molecules first. C 4 fixation is an addition to the ancestral and more common C 3 carbon fixation. The main carboxylating enzyme in C 3 photosynthesis is called RuBisCO , and catalyses two distinct reactions, with CO 2 carboxylation , and with oxygen oxygenation , which gives rise to the wasteful process of photorespiration. To ensure that RuBisCO works in an environment where there is a lot of carbon dioxide and very little oxygen, C 4 leaves generally differentiate two partially isolated compartments called mesophyll cells and bundle-sheath cells. OAA can be chemically reduced to malate or transaminated to aspartate. These diffuse to the bundle sheath cells, where they are decarboxylated, creating a CO 2 rich environment around RuBisCO and thereby suppressing photorespiration.

The upcoming discussion will update you about the differences between C3 plants and C4 Plants. The plants are unable to perform photosynthesis at very low CO 2 concentration say ppm. At low temperature, C 3 plants are more efficient while at high temperature their photosynthetic activity is comparatively reduced. There are two types of chloroplasts, granal in mesophyll cells and agranal in bundle sheath cells. Phosphoenol pyruvate is the first acceptor of CO 2 , while ribulose biphosphate is the second acceptor.


There is little doubt that, in C3 plants, normal dark respiration is replaced or supplemented by a light-dependent CO2 evolution from green leaves. This CO2​.


Key Differences Between C3, C4 and CAM Photosynthesis

The majority of plants and crop plants are C3 plants , referring to the fact that the first carbon compound produced during photosynthesis contains three carbon atoms. Under high temperature and light, however, oxygen has a high affinity for the photosynthetic enzyme Rubisco. Oxygen can bind to Rubisco instead of carbon dioxide, and through a process called photorespiration, oxygen reduces C3 plant photosynthetic efficiency and water use efficiency. In environments with high temperature and light, that tend to have soil moisture limitations, some plants evolved C4 photosynthesis.

Most people know that plants use photosynthesis to create energy using sunlight. However, the process of photosynthesis varies among plants, depending on their living conditions. The key difference between C3, C4 and CAM photosynthesis is the way plants extract carbon dioxide from sunlight, which depends largely on the plant's habitat.

Difference between C3 and C4 Plants

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Difference Between C3, C4 and CAM pathway

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PDF | by Lakna • 7 min read 0 Main Difference – C3 vs C4 plants C3 and C4 plants are two types of plants using C3 and C4 cycles during the.

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In addition, our motivation was to compare the differ- ences between C3 and C4 photosynthesis mechanism and their responses under different.

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