Task
1. Description of the photosynthetic mechanism of C3.
This type of photosynthesis employs the C3 Cycle by which carbon dioxide go through chemical reactions to form carbohydrates. Plants exhibiting this mechanism of photosynthesis are called C3 plants. The C3 cycle is also called the photosynthetic carbon reduction cycle and the Calvin Cycle.
2. Description of the photosynthetic mechanism of C4.
This type of mechanism of photosynthesis occurs in two adjoining types of cells. The mesophyll and bundle sheath cells in plant species called C4 plants. Both C3 and C4 cycles operate in non-light requiring reactions of photosyntheis. C4 is in the mesophyll cells and are immediately by C3 cycle in the bundle sheath cells.
3. Labelled diagram showing the C3 plant photosynthetic pathway.
4. Labelled diagram showing the C4 plant photosynthetic pathway.
5. Five species of plants that undergo C3 photosynthesis.
-Rice -Wheat -Barley -Tobacco -Oats -Peanuts -Soybeans
6. Five species of plants that undergo C4 photosynthesis.
-Crabgrass -Corn -Sugarcane -Nutgrass -Bermuda Grass
7. The environment conditions in which C3 plants are found.
C3 plants are relatively inefficient in using CO2 and have their photosynthetic apparatus in the outer mesophyll cells. To compensate for this inefficiency stomata must remain open longer exposing them to potentially increased evapotranspiration and respiration rates. As a result these plants grow better in cooler moist environments with elevated CO2 concentrations.
8. The environment conditions in which C4 plants are found.
In these environments, the pattern of stomatal opening and closing provides an important advantage for surviving arid conditions: When the stomata are open, water is lost. However, the rate of loss decreases as the air temperature decreases.
9. C3 vs C4 comparision/differences.
C3 cycle operates in all plants.
C4 cycle only operates in C4 plants.
C3 and C4 are all types of photosynthesis and both use light energy to convert Carbon Dioxide and Water into sugar and oxygen.
When the weather is hot and dry, both C3 and C4 plants shut their stomata. Carbon dioxide cannot enter the leaf and the oxygen cannot leave.