We can artificially change the environment in which we grow plants. We can use this to observe the effect of different factors on the rate of photosynthesis. We can also use it to control their rate of photosynthesis.
LIGHT: If there is plenty of light, lots of photosynthesis can take place. If there is little or no light, photosynthesis will stop regardless of the other conditions around the plant. The brighter the light, the faster the rate of photosynthesis.
TEMPERATURE: As temperature rises, the rate of photosynthesis will increase as the reaction speeds up. Photosynthesis takes place in living organisms, this means it is controlled by enxymes. Enzymes are destroyed once the temperature rises to around 40 to 50 degrees. This means that if the tempterature gets too high, the rate of photosyntheis will fall as the enzymes contolling it are denatured.
CARBON DIOXIDE LEVELS: Plants need carbon dioxide to make glucose. The atmosphere only contains about 0.04% carbon dioxide, this limits the amount of photosynthesis which can take place. Increased rates of carbon dioxide will increase the rate of photosynthesis.
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