Abstract: An experiment was carried out to determine how certain factors such as light intensity and availability of carbon dioxide, affected the rate of photosynthesis. The rate of photosynthesis was measure by the amount of oxygen produce (cm3/min).
A valid conclusion was made and most of the results were in accordance with the prediction, although there were some anomalies present. The errors and limitations were evaluated and some improvements were suggested.
Photosynthesis is an essential importance to organisms. It is the process by which green plants and a few organisms convert sunlight energy into chemical energy which is stored in molecules. Photosynthesis in green plants generally involves the green pigment chlorophyll and produces oxygen as a byproduct. This can be shown in the equation:
The rate of photosynthesis is dependent on environmental factors such as light intensity, availability of carbon dioxide, availability of water, nutrients and temperature. The most important factors are the availability of light and carbon dioxide, which are limiting factors. Temperature is of some importance, however its influence is less clear because it is dependent on the other two limiting factors (light and CO2) and the temperature tolerance of the plant.
The peak rate of photosynthesis is constrained by a limiting factor. This factor will prevent photosynthesis from rising above a certain level even though other factors essential for photosynthesis are improved. This liming factor will control the maximum rate of the photosynthetic reaction.
Photosynthesis takes place in two major parts: ATP and NADPH production (light reactions) and carbon fixation (“dark” reactions). – (Photosynthesis and the Environment , 1) Both processes are dependent upon each other – the relative concentrations of NADPH and ATP due to their consumption in the Calvin cycle influences photosystem mechanisms, and the amount of ATP and NADPH produced in the