The Effect Of Light Intensity On The Elodea

Have you ever really wondered how different variables can affect how plants go through photosynthesis? Well, in this experiment, the purpose was to see how various environmental conditions can affect the overall photosynthetic capacity of a specific plant. The factors, light, darkness, cold, and heat were applied to see how the different components would affect the photosynthesis on spinach plants. Each group was given a different factor to test. Out group was given the light factor. The hypothesis for this experiment is that when adding light as a factor, the light will affect the overall plant photosynthesis.

The purpose of this lab was to see which level of light (measured in lux) made Spinacia oleracea (Spinach) leaf disks float the fastest. Our hypothesis was that an increase in light intensity will decrease the time it takes Spinacia oleracea disks to float. If light intensity is increased, then the time it takes Spinacia oleracea disks to float will be decreased. The mean for the no light (0 Lux) sample and the low light (4 x100 Lux) sample was 1200 seconds with no standard deviation because none of the disks in these two samples floated. The mean and standard deviation for the medium light (110 x100 Lux) was 902 seconds +- 84 seconds. The mean of the high light sample (410 x 100 Lux) was 692 seconds with no standard deviation because only two Spinacia oleracea disks floated so there was no need to measure the variability of the data. The final results indicated that the highest light intensity led to the quickest rise of Spinacia oleracea disks, supporting our hypothesis.

Introduction: Photosynthesis can be defined as a solar powered process that removes atmospheric carbon dioxide and transforms it into oxygen and carbohydrates (Harris-Haller 2014). Photosynthesis can be considered to be the most important biochemical process on Earth because it helps plants to grow its roots, leaves, and fruits, and plants serve as autotrophs which are crucial to the food chain on earth. Several factors determine the process of photosynthesis. Light is one these factors and is the main subject of this experiment. The intensity of light is a property of light that is important for photosynthesis to occur. Brighter light causes more light to touch the surface of the plant which increases the rate of photosynthesis (Speer 1997). This is why there is a tendency of higher rates of photosynthesis in climates with a lot of sunlight than areas that primarily do not get as much sunlight. Light wavelength is also a property of

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

In my research paper, I will attempt to determine how the perception of light in phytochromes plays a role in the development of plants. Specifically, I will look at how phytochromes play a role in the growth and development of Arabidopsis thaliana. The paper will also look at how light perception plays a role in phototropism and the immune systems of a plant. Finally, my paper will explore how changing light conditions impact perception in phytochromes.

Based on your data, draw a conclusion regarding how light intensity affects the rate of photosynthesis.

Follow the steps detailed in the first experiment to test the effects of an increase in light intensity on photosynthetic rates in corn (a C4 plant).

Purpose: In doing this lab, the objective was to find how the intensity of light effects the of the products of photosynthesis. This lab will measure to what extent production of photosynthesis increases when light intensity is increased. This experiment will not only provide a visual representation of the process, but will also allow for further examination of the relationship between photosynthesis and cellular respiration. Introduction: The process of photosynthesis uses energy from the sun to produce glucose for plants, and cellular respiration takes glucose and oxygen to form carbon dioxide and water.

As light intensity increases, the photosynthetic rate of a plant increases as well. However biochemical reaction, in fact, DO have temperature limits because if the temperatures reach a certain degree and overheat, the enzymes will get damaged and/or lost and inevitably die. Therefore, temperatures must be a tolerable limits in order to increase a photosynthetic rate. Photosynthesis at low temperatures actually take CO2

Plants rely upon photosynthesis to acquire their energy and make food. To determine exactly how important light energy is in the process of photosynthesis, we decided to conduct an experiment in which an Elodea plant was exposed to different light intensities. One Elodea plant was placed inside CO2 saturated water and under full light exposure while the other was covered with mesh clothing. The solutions to this plants were then neutralized and compared to a control group beaker which had no Elodea to see the

Based upon the results of experiment 6 the hypothesis was not supported because the rate of photosynthesis did vary depending on the amount of light the plant received. In the experiment, the plants placed into the dark was not allowed to undergo photosynthesis since carbon dioxide was not released. But the plant that was placed into light conditions was allowed to undergo photosynthesis and produce the final product which is carbon dioxide. This explains that if plants are put into conditions that are darker than most, the plant will not be able to function properly and not go through photosynthesis which is needed for the plants survival. Without the the production the photosynthesis the plant will “starve” without the sugars and carbon dioxide that are produced.The experiment above applies to biology because of the quantity of light needed for plant to go through the process of photosynthesis. Biologist can use the data to interpret in what ways can animals benefit from plants, which can further to why animals benefit and need the process of photosynthesis (Gunstream,

This time length was chosen because longer blending periods might cause the chloroplasts to lose their functionality. While simultaneously avoiding CO2 that would cause the photosynthesis reaction to begin, four-layer cheesecloth filtered the solution so it only contained chloroplasts and not cell wall or any other organelles. Five test tubes were needed in our experiment: Tube 1, used for calibrating the spectrophotometer, contained 1 mL of buffer to neutralize the pH of the solution, 4 mL of water, and 3 mL of chloroplasts; Tube 2, the control tube, was only exposed to the fluorescent lights in the room; and three tubes that were used for the actual experiment, Tubes 3, 4, and 5, were assigned separately to each wattage variation. Tubes 2-5 were filled 1 mL of buffer, 3 mL of water, and 3 mL of chloroplasts. The calibration tube was used to set the spectrophotometer’s transmittance to a “base” or “zero” reading, making each experimental tube’s reading more accurate. The control tube held the same contents as the three experimental tubes, but it was not placed under a lamp. Instead, this tube was left alone in the fluorescent lights of the room to observe the chloroplasts’ photosynthetic behavior by themselves, without the aid of light bulbs shining on them that may increase their photosynthesis rates. Test tube racks were used to hold the tubes up in front of their designated lamps. A large Erlenmeyer flask filled

The photomorphogenic responses were that the no light plants experienced phototropism, however the no light plants magnitude of curvature far exceeded the light plants. This was evident in the curved, elongated shape they displayed. This study also helped to identify etiolated characteristics in the no light plant, from its physical weakness in the stem, a lower forming internode, and no chlorophyll present in its brittle, under-formed, leaves. In comparison, the light induced plant was much stronger, chlorophyll was evident The no light plant demonstrates that in order for a plant to thrive with enough enzymes, sugars and chlorophyll and to gain nourishment it needs light (Holt, 1995). According to (Curtis, 1903) ‘Nearly all plants will endure a surprising amount of stimulation, to enable them to accomplish morphological differentiation that is associated with light’. In saying this, it was observed the etiolated plant grew at fast speeds, however the plant had different priorities to that of the light induced

Photosynthesis is a vital process that autotrophs use to transfer light energy into chemical energy. Photosynthesis ultimately produces O2 and glucose. It, like many other biological processes, can be affected by environmental variables. The variable that we altered in the following experiment are intensity, light wavelengths, and pigment types. In order to do this, we conducted three experiments. In the first experiment, we examined the effect of light intensity by placing vials with chloroplasts with DPIP at different light distances in which the results varied. Initially, 30cm away was the most effective for photosynthesis. Then 24cm appeared to be the most effective. Followed by 49cm at minutes 25 and 30. In the second experiment, we

All this lights have equally conurbation towards plants growth but without any light then there is no process of photosynthesis which means there no plant growth at all. Photosynthesis is the procedure whereby radian vitality from the sun is changed over to the concoction bond vitality of glucose. In plants it happens in chloroplasts which concentrated cells. Chlorophyll atoms are instrumental in the first step, which is the change of light vitality to the substance bond vitality of ATP. Vitality to change carbon dioxide and hydrogen to glucose is then given by the ATP. Oxygen is discharged as a waste result of procedure. The reaction is shown below: