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Effect of different colors of light on the rate of photosynthesis.

To experimentally determine the effect of lightintensity on the rate of the light-dependent reactions of photosynthesis.

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Effects of different colors of light on the photosynthesis rate.

It will be very interesting to see how light will influence the rate of photosynthesis in plants and what will happen if they do not get the required light in order to produce starch .

How does light intensity and duration affect the rate of photosynthesis?

Lab experiments using tubes filled with CO2 to represent the atmosphere show that the IR transmission is essentially saturated and doubling the amount changes the transmission very slightly . So what is wrong and how are these arguments refuted by the majority of climate scientists? There are two main arguments why global warming is important despite apparent saturation when man adds CO2 to the atmosphere (see ). The first of these is rather convincing.

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In order to cultivate microalgae commercially, a durable, reliable, low cost and high efficiency light source is required. Nowadays, among the variety of light sources, light-emitting diodes (LEDs) are the only ones that can achieve this criteria. LEDs are light and small enough to fit into almost any type of photobioreactor and their advantages such as lower heat generation, longer life-expectancy, higher conversion efficiency and others has made them commercially viable 5. For the growth of the different kinds of algae, different nutrients in the growth medium and different wavelengths may be necessary.

There are 3 main CO2 bands of IR absorption at wavelengths 1388, 667, 2349 cm-1 (HITRAN) and these are already saturated at current levels of CO2 in the atmosphere. Infra Red measurements from space show that the atmosphere is opaque at these wavelengths. However at high levels in the atmosphere this is not no longer true and this is the only argument for the enhanced greenhouse warming by CO2 warming which makes sense to me (see below).

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In this study all environmental conditions, except for the wavelength of light and light intensity, were kept constant when growing Chlorella pyrenoidosa in internally illuminated bubble column photobioreactor. In the experiments red, blue, green and white LED lights were used as illumination sources. The results after a period of ten days of growth showed the effect of the four illumination sources relative to cell mass and biochemical composition of algal biomass.

This process is also affected by the temperature surrounding the plant (the species of plant we experimented with, pond weed, photosynthesised best at around 20 degrees centigrade.) Light, temperature & CO2 are known as limiting factors, and each is as important as the next in photosynthes...

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    I am trying to find out if the distance of the pond-weed from a lamp will change the rate of photosynthesis.

  • The Effect of Different Wavelengths of Light on the …

    Photosynthesis is the process of converting light energy into chemical potential energy and storing it as starch....

  • The Effect of Different Colors of Light on ..

    I then think that the rate of photosynthesis will stay the same when it reaches a certain point.

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Effect of Light Wavelengths on Photosynthesis ..

So how can these factors have an effect on the rate of photosynthesis? Lets start off with the light intensity. When the light intensity is poor, there is a shortage of ATP and NADPH, as these are products from the light dependent reactions. Without these products the light independent reactions can't occur as glycerate 3-phosphate cannot be reduced. Therefore a shortage of these products will limit the rate of photosynthesis. When the carbon dioxide concentration is low, the amount of glycerate 3-phosphate produced is limited as carbon dioxide is needed for its production and therefore the rate of photosynthesis is affected. Finally, many enzymes are involved during the process of photosynthesis. At low temperatures these enzymes work slower. At high temperatures the enzymes no longer work effectively. This affects the rate of the reactions in the Calvin cycle and therefore the rate of photosynthesis will be affected.

Investigating the Effect of Light Wavelength on the …

A limiting factor is a factor that controls a process. Light intensity, temperature and carbon dioxide concentration are all factors which can control the rate of photosynthesis. Usually, only one of these factors will be the limiting factor in a plant at a certain time. This is the factor which is the furthest from its optimum level at a particular point in time. If we change the limiting factor the rate of photosynthesis will change but changes to the other factors will have no effect on the rate. If the levels of the limiting factor increase so that this factor is no longer the furthest from its optimum level, the limiting factor will change to the factor which is at that point in time, the furthest from its optimum level. For example, at night the limiting factor is likely to be the light intensity as this will be the furthest from its optimum level. During the day, the limiting factor is likely to switch to the temperature or the carbon dioxide concentration as the light intensity increases.

The Effect of Different Colors on a Bean Plant | Garden …

Furthermore, I predict that if the light intensity increases, the rate of photosynthesis will increase at a proportional rate and more oxygen will be produced and therefore the oxygen levels will increase.

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Variables: The variables that might affect the rate of photosynthesis in this experiment are: Temperature: When the temperature rises so does the rate of photosynthesis; this is because as the temperature around the plant rises the enzymes controlling photosynthesis inside the chloroplasts heat up and start moving around faster, the fast moving molecules collide with other fast moving enzymes causing them to react....

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