Introduction.
Light is a very important factor in the rate of photosynthesis, in my project I am going to test that plants do need light in order to photosynthesise. 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 .
The plant I have chosen to do is a Geranium which is a dicotyledonous plant found in the dry and hot regions of South Africa.
Aim
To see whether light effects the rate of Photosynthesis in plants or not.
Research Hypothesis.
Photosynthesis will occur at a faster rate when the plant is exposed to the sun, than when it is not exposed to sunlight.
I chose to test the effect light has on plants because it is very interesting to test that light is a very important factor, and as the earth gets hotter it will be interesting to see what will happen at the end while sunlight is important at the moment and is a core ingredient for photosynthesis, it will also be very interesting to see what would happen if the plants had no exposure to sun at all, and if they would adapt.
Literature Review
Article 1:
Plant Photosynthesis.
Photosynthesis is a process in plants that converts light energy into chemical energy, which is stored in bonds of sugar. The process occurs in the chloroplasts, using chlorophyll. Photosynthesis takes place in green leaves. Glucose is made from the raw materials, carbon dioxide, water, light energy and oxygen is given off as a waste product. In these light-dependent reactions, energy is used to split electrons from suitable substances such as water, producing oxygen. In plants, sugars are produced by a later sequence of light-independent reactions called th...
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...ed out very well as the plant I tested was correctly done, and it had a band that was yellow/brown where there was no starch present, the same leaf had a black boarder where the paper/foil was not placed, this was black because photosynthesis had occurred and produced starch. Therefore showing that light along with the other core ingredients are important factors for photosynthesis to take place successfully.
Bibliography
Effects Of Light. (2013, December 16). Retrieved March 20, 2014, from Google: http://www.rsc.org/learn-chemistry/content/filerepository/CMP/00/001/068/Rate%20of%20photosynthesis%20limiting%20factors.pdf
Geranium. (2014, January 17). Retrieved March 20, 2014, from Wikepedia: http://en.wikipedia.org/wiki/Geranium
Plant Photosynthesis. (2014, January 22). Retrieved March 20, 2014, from Google: http://biology.clc.uc.edu/courses/bio104/photosyn.htm
The goal of the experiment was to determine if green light had less ability to absorb than red light in spinach leaves. This was done by separating the photosynthetic pigments (chlorophyll a, chlorophyll b, carotene and xanthophylls) from one another using paper chromatography. The separated pigments were then analyzed for their absorption spectrum using a spectrographometer. When the data was graphed it clearly showed the higher rate of red light absorption over green light. These results along with previous research indicate the importance of red light in photosynthesis and the minor role green light plays.
DPIP will be used to determine the rate at which the cholorplasts are being reduced. The spectrophotometer will establish the wavelength of light that penitrats the chloroplast solution in turn determining the amount of electrons reduced. In the dark reactions, the spectrophotometer will measure the amount of light passing through a darker solution of DPIP and chloroplasts. In the light reactions, the lighter solution, caused by reduction of the chloroplasts, will allow a larger amount of light to pass through to the photocell of the spectrophotometer. Thus, the spectrophotometer will prove wheter the light or dark reactions affect the rate of photosynthesis in chloroplasts. We will also be using a reference solution made of water, phosphate buffer, and active chloroplasts. The purpose of this solution will be used to set the transmittance level for the experiment. The control solution, which is different than the reference solution, is comprised of water, phosphate buffer, and DPIP. It will be used to prove that the three element of the solution do affect the results- it is strictly the chloroplasts that are subjected to the light/dark conditions.
In this experiment I will investigate the affect in which the light intensity will have on a plants photosynthesis process. This will be done by measuring the bubbles of oxygen and having a bulb for the light intensity variable.
It can be concluded that chloroplast is responsible for photosynthesis, with blue light forming the highest rate of photosynthetic activity. The widespread use of coloured netting in the future could result in indoor plant growth that is unreliant on weather, and the ease of the production of crops with the desirable phenotypes. However, future research is still required to eradicate any unknown data and determine plant responses in relation to wavelength
The experiment was conducted using carbon dioxide to see how it affected the rate of photosynthesis in spinach leaves. Carbon dioxide should increase the rate of photosynthesis because there will be more carbon dioxide, a reactant in the photosynthesis formula.
Photosynthesis happens in leaves so this experiment was conducted with foliage. Foliage is just another way of saying leaves. These leaves have been group together and they also have roots in the soil. The height of the plant above the soil was about 4 inches tall. All of the plants weighed 3 oz. the five plants had differences on their leaves. Plant A had solid green leaves. Plant B was green but it was lighter in the middle of the leaf. Plant C had a red stem and there was a red thick band on the edge.
The Effect of Light Intensity on the Rate of Oxygen Production in a Plant While Photosynthesis is Taking Place
Sunlight and light classrooms will only affect the plants at a certain time limt because the plants are place inside the building and near the windows.
My final hypothesis was that the Elodea plant will produce no light when it is in a dark room. My hypothesis was correct because dark rooms have no light. Without light, a plant cannot perform photosynthesis.
The reason this was done was to make sure as little oxygen as possible was contained in the leaf material. This coused the experimrnt to run properly. If the leaf material was not placed in the dark, the dark reaction would not have occured using up all the oxygen. If there was still oxygen in the leaf material, the data collected would have been off. The reason for this is that the leaves would have risen to the top of the liqiud quicker, because they would not have had to make the totql amount of oxygen.
Introduction: Photosynthesis uses the sun’s energy and uses it to convert carbon dioxide and water into sugar. There were two plants that stayed outside in the sunlight and two plants that were inside only receiving sunlight from the window. If the plants stay outside then they will grow at a faster rate and will be the tallest with most leaves because they receive more sunlight from the sun and have a fresher environment. Methods: Both the plants inside and outside were exposed to sunlight and given water every day. Results: The plants inside grew more than the plants inside. The plants outside did not last all of the weeks the experiment was being conducted.
The second part of this lab deals with photosynthesis. This lab has several experiments. In the first experiment students will learn about the effects that different colored test tubes have on photosynthesis in elodea sprigs.
Experiment #1: The purpose of this experiment is to investigate the effects of baking soda and light intensity on the rate of photosynthesis of green spinach leave through the observation of floating disk.
Increases in temperature can decrease the efficiency of photosynthesis; however the extent of this impact may be determine on the species' dependency on light.
According to scientists, photosynthesis is “the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a byproduct.” ("pho•to•syn•the•sis,")