Photosynthesis Lab Report

The rate of photosynthesis is affected by environmental factors like light intensity, light wavelength, and temperature. This experiment will test the

This lab was conducted to explore the light energy, pigments and the rate of photosynthesis in magnolia leaves. In experiment one a magnolia leaf was used to see the separation of primary and accessory plant pigments using a process called paper chromatography. The importance of this process was to discover which pigment had the highest band along a piece of filter paper and identify various plant pigments in a magnolia leaf such as xanthophyll, chlorophyll a, chlorophyll b, and carotenoids that aid magnolia leaves during photosynthesis. Based on the conducted experiment, it can be concluded that chlorophyll a was the pigment that showed the highest band on the piece filter paper which means that chlorophyll a is the primary pigment in photosynthesis

4.) What conclusions can you draw about which color in the visible spectrum causes the most plant growth?

The argument in the scenario was being made between Abby and Estelle over the pigments in the multicolored coleus plants. Abby was certain that the green section contained chlorophyll, whereas, Estelle claimed that both the green and purple parts of the coleus plants consisted of chlorophyll. A paper chromatography test was conducted to clearly separate the mixture of the pigments in which the mixture was dropped onto a slip of paper and the end was then placed into a solvent.

photosynthesis happens in two stages: light reaction and carbon fixation also known as calvin cycle.light reaction TAKES PLACE IN THYLAKOID USE light energy to produces atp and nadph whereas, calvin cycle takes place instroma uses energy derived from light dependent reaction to make GA3P from CO2 ( Bio166 lab execise manual, 2015). the purpose of this experiment was to separate plant

The purpose of this lab is to observe the effect of white, green, and dark light on a photosynthetic plant using a volumeter and followed by the calculation of the net oxygen production using different wavelengths color of white and green light, and also the calculation of oxygen consumption under a dark environment, and finally the calculation of the gross oxygen production.

With more studies being conducted on plants grown in various lights it could bring a rise in the production of vegetation indoors and out. The purpose of this study was to test whether or not plant grown in red, blue and normal light effect the growth of a bean plant. The question being, will red and blue light impact the growth rate of a bean plant? It was hypothesized that plants grown in blue light it would produce larger plants compared to the plants grown in the red and normal light. As (Smith et al. 1973) stated that blue light at a high energy can satisfy both requirements for growth but, red light at any level can only satisfy some requirements. If blue light can satisfy the requirements of growth production, than plants grown in blue light will produce taller plants compared to plants grown in red

For lab 12, it is hypothesized that chlorophylls a and b are present in a plant leaf and contribute to the starch production in photosynthesis. Also, products of photosynthesis will be present in leaf tissue exposed to red and blue light wavelengths for several days, but a decreased presence in leaf tissue exposed to green and black light wavelengths. In lab 13, it is expected that since chlorophylls a and b are more polar and smaller molecules than the anthyocyanins and carotenoids, they will travel higher up the chromatography paper than the other pigments.

Three hypotheses are formed to conduct and evaluate. The first experiment, changing the color of the lights, hypothesis one states the intensity of the green light will have a greater increase and effectiveness to the plant than the natural or red light. The green light will influence the photosynthesis in the plant because it is more absorbent to the plant. The green light gives the plant a more closer feel to its original environment and the amount of light it would receive in its original environment.

The hypothesis is that the color of the leaf will affect the rate of photosynthesis,

Spinach leaf discs produced the most oxygen when they were exposed to a light that they were most able to absorb. By using tinted light bulbs, the color of light emitted becomes narrower. Photosynthesis is still able to take place when exposed to monochromatic light, but the rate may be affected if it is a color not easily absorbed by the chlorophyll in the plant. We see the directs effects of light when measuring decreased photosynthesis in plants exposed to monochromatic light, rather than a light of all wavelengths.

In conclusion to the experiment, it was discovered that all of the substances being tested showed respiration except for the non-germinating peas. The trends in the most of the graphs showed the level of oxygen decreasing while the amount of carbon dioxide increasing. In comparison to the other groups, the overall trend was similar although some groups did not follow the exact protocol. The cold germinating peas inhibited oxygen consumption, however they were still respiring since they had to regain energy from their cold environment. According to The Journal of Research in Science and Teaching, it is important to understand that this photosynthetic process relates to cellular respiration because photosynthesis creates the glucose that is

The experiment demonstrates that when the Hill reaction is disrupted, photosynthetic activity can be drastically affected. If one was attempting to kill weeds using the light reaction, they can target the denaturation of chloroplast that will then directly lead to the weeds inability to absorb light to complete photosynthesis. One could also use a chemical that dehydrates the plant, thus disallowing any electrons to be donated into the system. With no electrons flowing in the system, there is no reduction of an electron acceptor, meaning no glucose for the weed. Also, chemical herbicides can be used effectively to study an individual photosystem.

However, the photosynthetic process can be affected by different environmental factors. In the following experiment, we tested the effects that the light intensity, light wavelength and pigment had on photosynthesis. The action spectrum of photosynthesis shows which wavelength of light is the most effective using only one line. The absorption spectrum plots how much light is absorbed at different wavelengths by one or more different pigment types. Organisms have different optimal functional ranges, so it is for our benefit to discover the conditions that this process works best. If the environmental conditions of light intensity, light wavelength and pigment type are changed, then the rate of photosynthesis will increase with average light intensity and under the wavelengths of white light which will correspond to the absorption spectrum of the pigments. The null hypothesis to this would be; if the environmental conditions light intensity, light wavelength and pigment type are changed, then the rate of photosynthesis will decrease with average light intensity and under the white light which will correspond to the absorption spectrum of the pigments.

This lab allowed the experimenters to understand the effect of light on the producer’s photosynthesis. Once understanding how the light dependent reactions of photosynthesis worked, the experimenters can make predictions on how the light will affect the photosynthesis. For example, a low amount of light will affect the light dependent reactions of photosynthesis because light is essential for those reactions. The question the experimenters asked was, “Does having more or less exposure to light cause a faster rate of photosynthesis?”