With the distilled H2O the rate of reaction went up from 0. This is a 4 times rise which is rather big. The curve on the graph does nevertheless level out rather shortly demoing that the rate is being limited by the deficiency of NaHCO3 in the H2O. At a light strength of 4 the rate is 0.
It shows how the amount of CO2 and light affect the rate of photosynthesis. Lines of best fit were drawn for each CO2 concentration to make up for any inaccuracy in any individual result.
The line of best fit gives a good picture of how the overall rate of reaction is affected by the light and CO2.
Interpretation I will analyse the results for how the amount of light and CO2 affects the rate of photosynthesis. My prediction that the rate of photosynthesis would go up if the light intensity and NaHCO3 levels were increased proved correct.
As the elodea absorbed the light and CO2 it produced oxygen gas which increased the pressure in the syringe. This pushed the air bubble in the capillary tube down. It is at this stage of the reaction that oxygen is produced as a waste product.
As predicted when the light intensity increases so does the rate of photosynthesis. I predicted that a level would be reached where increasing the light intensity would have no more effect on the rate of reaction as there would be some other limiting factor which limits the rate of the reaction.
The rate increases at a steady rate as the light intensity increases until near the end of each line where the rate of increase decreases.
As 6 different CO2 concentrations were used I can see that the first five reactions are not occurring at their maximum rate as there is the 0. The photosynthesis reactions of the other five test must therefore be limited by the concentration of CO2 to the plant.
As predicted when the NaHCO3 concentration is increased the plant in able to get more CO2 which causes the rate of reaction to go up. I predicted that once the NaHCO3 had been raised above a certain level increasing the rate further would have no effect as there would be other limiting factors limiting the rate of the reaction.
As the NaHCO3 concentration in the water was increased the rate of photosynthesis was able to go up. The plant therefore made more oxygen as a waste product.
At a NaHCO3 concentration of 0. Distilled Water With the distilled water the rate of reaction went up from 0. This is a 4 times rise which is quite large. The curve on the graph does however level out quite soon showing that the rate is being limited by the lack of NaHCO3 in the water.
The curve is very shallow and levels off towards a light intensity of - The rate also finishes off twice that of the 0. This would surgest that there was a directly proportional relationship between the amount of NaHCO3 and the rate of reaction.
The rate rises to 1. The plant is using the extra CO2 to photosynthesise more. As the plant has more CO2 the limiting factor caused by the lack of CO2 is reduced. This test did produce a big anomaly. The rate for a light intensity of is 5.
By following the line of best fit I can see that this result should be more like 3. The elodea for this test was very close to the light source. It is possible that it had been left here for a while which caused the lamp to heat the elodea up. Near the end of the line it looks as if the rate of reaction is hit by another limiting factor.
The line goes up steadily but then between a light intensity of and levels off very quickly. This would surgest that at a 0. Increasing the NaHCO3 concentration after this level would therefore have no effect unless the next limiting factor was removed.The environmental factors affecting the process of photosynthesis follow the law of limiting factor as hypothesized by the British plant physiologist F.
Blackman in According to this hypothesis, when a process is influenced by a number of factors, the rate of the process is limited by the. The main factors affecting rate of photosynthesis are light intensity, carbon dioxide concentration and temperature.
In any given situation any one of these may become a limiting factor, in other words the factors that directly affects the rate at which photosynthesis can take place masking the . each of the variables affected the rate of photosynthesis.
Further discussion questions are: What ecological factors affect the various variables we observed as. What factor most affects the rate of photosynthesis?
The main variables which affect photosynthesis are light, water, CO 2 concentration and temperature.. On a deeper level, other factors like amount of chlorophyll, availability of nutrients (eg Mg is needed for chlorophyll synthesis) will also affect the rate of photosynthesis, though these are rarely covered in discussion of this topic.
Factors Affecting Photosynthesis By understanding the factors that affect photosynthesis, one can better understand the rate of the process.
Light: Without light, a plant cannot photosynthesize very quickly, regardless of whether there are water and CO 2 or not. Factors affecting the rate of photosynthesis. The term rate always involves time, so the rate of photosynthesis can be considered to be how fast photosynthesis takes place.
This can be measured by the amount of glucose produced by a plant over a given .