Investigating the rate of photosynthesis of Canadian Pondweed

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Jacob Henry

Investigating the rate of photosynthesis of Canadian Pondweed

        

Aim: I will be investigating how light intensity affects the rate of photosynthesis and what the limiting factors do to prevent the rate of photosynthesis from increasing further.

Prediction:

For this investigation I will be investigating how light intensity affects the rate of photosynthesis, the equation of photosynthesis is

Carbon dioxide+water+glucose+oxygen

It is important to the reaction that certain factors are present when it is occurring. We know that these are Carbon Dioxide, Water, Light and Chlorophyll. Without these the reaction will not take place at all. But I predict that as I increase the light the rate of photosynthesis will increase until it gets to a certain point where the rate of photo synthesis will no longer increase.

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As the light intensity (LI) increases, the rate of p/s increases, until the plant is photosynthesizing as fast as it can - the LSP - Light Saturation Point. When the LSP is reached, plants cannot photosynthesize any faster, even when the light gets brighter.

As the amount of CO2 available increases, the rate of p/s increases, until the plant is photosynthesizing as fast as it can - the CSP - CO2 Saturation Point. If both CO2 and light supply are increased together, the rate of p/s will level out.

I predict that as I ...

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