c3 and c4 plants
C3 and C4 plants have two things in common, they both are found in hot and very dry areas and they both use photorespiration. However, the difference is the way they react toward water loss which will affect photosynthesis. If a C3 plant starts to transpire rapidly because it is photosynthesizing and the stomata are open, then it will close the stomata, ending photosynthesis. What the plant does next is undergo a counterproductive cycle called photorespiration. In the C3 plant photorespiration actually uses up 50% of the CO2 fixed by the Calvin cycle. What happens is the plant closes it’s stomata and as a result stops transpiration and photosynthesis. What happens is the O2 level rises and the CO2 drops. Then the plant must use O2 in place of CO2 to input into the Calvin cycle. A two carbon molecule comes out and is broken down by peroxisomes into CO2. This just uses up CO2 and doesn’t benefit the plant because no energy or food is made in this process. In a C4 plant it is different. When it needs to close it’s stoma to stop transpiration, it undergoes photorespiration as well, however, it’s photorespiration is productive. Preceding the Calvin Cycle
. . .
Some common words found in the essay are:
C3 C4, Calvin Cycle, Eyed Susans, CO2 CO2, O2 CO2, calvin cycle, bundle sheath cells, bundle sheath, sheath cells, seeds fruit seeds, c3 c4 plants, genetically engineered plants, close stomata, evolution responsible, c4 plant, 4 carbon, c3 plant, bean weevil, co2 drops,
Approximate Word count = 779
Approximate Pages = 3 (250 words per page double spaced)
|
 |
