Method: We first took a test tube and filled it with sodium hydrocarbonate and then placed the plant inside the tube. Leaves with Kranz anatomy are more efficient in photosynthesis. The whole process is so effective that in optimum conditions 90 percent of light is absorbed. Alhtough I am quite puzzled myself at why there was sometimes a decrease in percentage increase, even through extentive research I have been unable to find the answer. 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. I will intend to plot a graph.
Inside of the cell consists of chlorophyll and stroma. Both quality and intensity of light are important for photosynthesis. So water is an important limit on a plant. Place the 60watt lamp at these distances away from the beaker once you have started timing: 20cm; 15cm; 10cm; 5cm; 0cm Decrease the distance every 3 minutes 5. Theory: Before I predict what will happen I must look at how photosynthesis occurs.
However, this could have been due to a number of factors, the plant may have been tired or there could have been another limiting factor, e. For instance, with lower concentrations of the limiting factor e. Photosynthesis needs water, carbon dioxide, chlorophyll, light, and the right temperature. High temperature affects the activity of enzyme, and therefore, the rate of photosynthesis decreases. The environmental factors affecting the process of photosynthesis follow the law of limiting factor as hypothesized by the British plant physiologist F. The light intensity was varied from the most intense light to no light, the levels of light used were 1000, 50, 10 and 0 µmol photons m-2 s -1. First clip that end of the pondweed that was not cut.
An example of that type of experiment would be something something lik putting test tube in a fridge, on the side and in an incubator which can control temperature. For this reason plants in different environments have different structures to help them get the right amount of light. External factors affecting Photosynthesis 1. As the light increases, the rate of photosynthesis also increases. We can do the same for temperature. Between the C 3 and C 4 plants, while the former species have optimal rates from 20-26°C, the latter species may show optimal rates from 35-40°C.
Under these circumstances, any further increase in the rate of photosynthesis can be brought about only if the light intensity is increased. At a very high oxygen concentration, the rate of photosynthesis begins to decline in all the plants. As with many chemical process energy is need to make and break molecules during the chemical process. The internal factor influencing the photosynthesis is chlorophyll content of the leaves and protoplasmic factors. This indicates that protoplasm is not necessary for photosynthesis. Emerson 1929 observed a direct relationship between chlorophyll content of the leaf and the rate of photosynthesis. Add sodium bicarbonate powder to the test tube, place the lamp 5 cm from the test tube, after several minutes record bubbles.
Now if the carbon dioxide concentration is gradually increased, the rate of photosynthesis will also increase correspondingly until the assimilation rate of 5 mg carbon dioxide per hour has been reached. Count and record the number of bubbles, produced from the stem that as been cut, at the distances shown below in the table. When this occurs, leaves can experience sunburn damage. Procedure a Set up the apparatus as shown in a darkened room. For example, photosynthesis can be influenced by both C0 2 concentration and light intensity. If the accumulation of products takes place beyond a limit, photosynthesis stops. Light: The photosynthetically active region of the spectrum of light is at wavelengths from 400-700 nm.
As the light is moved away from the plant the number of oxygen tend to increase. Photosynthesis in plants is affected by the intensity of the light the plant is exposed to. Plan The plan or method I will be using will start of by placing a plant in a test tube filled with water. The 100 cm ruler will be placed between the clamp stand and lamp so you know how far to move the lamp after you record the bubbles for each light intensity. If you've ever seen a leaf with large dry brown sections on a living leaf, it is because that leaf experienced sunburn. If they reflect it, then they're not absorbing it, right? By rinsing the test tubes keeps the experiment accurate as if you didn't rinse the test tubes before you do the experiment again, bits of indictator, pondweed etc. And, of course, different photosynthetic organisms thrive on different wavelengths of light.
This will be done by measuring the bubbles of oxygen and having a bulb for the light intensity variable. Abstract: The overall aim of this report was the conduct an experiment based how different light intensity levels, representing the four seasons in a year: summer, spring, autumn and winter, affects the transpiration rate in a mangrove plant. Diuron is a herbicide that will be used in this experiment. For instance some lichens can photosynthesize at 20°C while conifers can assimilate at 35°C. I tried to post a spectrum to show this but the forum software keeps deleting my image when I preview the post. As with many chemical process energy is need to make and break molecules during the chemical process. Prediction I predict When I do this, I will then find the light intensity by dividing the number which came up on the light meter into 1; this will be the light intensity.
That is the only way to see if the reaction has occurred or not. There is an initial increase in the rate of photosynthesis at this temperature. With the increase in C0 2 concentration, the rate of photosynthesis increases provided other factors are not limiting. The apparatus I am going to use are the following: - 1 Tripod 1 300ml Beaker 1 Boiling Tube 1 Clamp Stand 1Clamp 1 Boss 1 Ring Binder 1 Lamp 1 1 Metre Ruler 1 Thermometer 1 Stop Clock To do the experiment I will set up the apparatus first. Fact: Carbon dioxide makes water slightly more acidic. In photosynthesis, a plant takes carbon dioxide from the air and water from the soil and uses the light from sunlight to turn them into food. There are four things that are required by the plant before it can carry out photosynthesis, they are light, chlorophyll, carbon dioxide and water.