Conditions affecting the rate of Photosynthesis


The rate at which photosynthesis occur depend on the following 3 factors:

The amount of  CARBON DIOXIDE - the more carbon dioxide that is available to the plant, the faster the rate of photosynthesis, because carbon dioxide is one of the raw-materials.


The amount of SUNLIGHT - the amount of light received by chlorophyll determines how quickly  photosynthesis occur.  The faster the light strikes the leaf, the quicker the rate of photosynthesis.  The type of light that hits the leaf is also important.  Most plants appear green because they reflect green light.  Therefore, green light does not take part in driving the process of photosynthesisRed and Blue light are absorbed, hence these two colours are the most important ones for photosynthesis.

The TEMPERATURE - photosynthesis is a chemical process, controlled by enzymes such as chlorophyll.  So it works best at warm temperatures, but not too hot.

From the graphs, it can be said that if Light, carbon dioxide and temperature are scarce, they will keep the rate of photosynthesis down. Therefore, they are called  LIMITING FACTORS.

For example, on a hot, sunny day when there is plenty of light and high temperature, the rate of photosynthesis depends on how much carbon dioxide there is.  Carbon dioxide is then said to be the limiting factor

Photosynthesis Experiments


Tags:Photosynthesis, Rate of photosynthesis, carbon dioxide




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