Photosynthesis Happens in the Leaves The equation also gives you a clue of some of the requirements for photosynthesis as well as some of the factors that can affect it. This is my conclusion because light intensity is one of the limiting factors of photosynthesis and also one of the reactants of photosynthesis therefore it will directly affect the rate of photosynthesis when increased or decreased more evidently in this investigation as the other two limiting factors of photosynthesis, carbon dioxide concentration and temperature are keep constant. The fact that the curve levels off so quickly indicates that there is another limiting factor limiting the photosynthesis. Wrong temperature raises the rate of respiration above photosynthesis. Sometimes cutting 2—3 mm off the end of the weed will induce bubbling from the cut end, or change the size of the bubbles being produced.
It is found that even slight deficiency of water results in significant reduction in the crop yield. The control in this experiment was spinach, which was tested before any of the other plants were. Some types of cells work harder than others; therefore, they require more energy. If the temperatures are above or below this range, the enzymes may be affected, slowing down the rate of photosynthesis. This could be because photosynthesis is occurring at it's maximum possible rate or because another limiting factor is limiting the rate of reaction. While important, water is not considered to be a limiting factor for a couple of reasons.
Photosynthesis is the method that plants use to make their own food. Stomata of most plants also close in the dark. The sun is the main source of light energy. For photosynthesis to occur, plants need: · Light energy from the sun · Chlorophyll to absorb light energy · from the atmosphere and from respiration in plant cells · Water which is absorbed by the roots and transported to the leaves by the xylem tubes. Thus light is not a limiting factor at high intensity. The preceding informaton applies to herbaceou … s and woody plants, and therefore to kudzu.
Sometimes cutting 2—3 mm off the end of the Elodea will induce bubbling from the cut end or change the size of the bubbles being produced. The carbon dioxide is stored in the plants until the … y decompose or are burned. As I sit in my study in England, the sun is shining brightly, but the temperature outside is only 5ºC. When you look at a tree, can you see differences in shape between shade and sun leaves? Light is also directly used in the photosynthesis reaction and is easy to change in normal lab conditions. Background information: Photosynthesis Photosynthesis is the process of autotrophs turning carbon dioxide and water into carbohydrates and oxygen, using light energy from sunlight.
Light Intensity Temperature An optimum temperature ranging from 25 oC to 35 oC is required for a good rate. Although taking these steps will make the experiment more accurate, it's accuracy is still limited by several factors. Carbon Dioxide and Light are the factors that I will change in the experiment as they are easy to change and measure. Disclaimer This is a real A-level school project and as such is intended for educational or research purposes only. Push in the plunger until only a small volume of air along with the leaf disks remain in the syringe 12. Another fantastic bonus of photosynthesis is that because it needs carbon dioxide, we can pump waste carbon dioxide from our factories straight into greenhouses. These elements are essential for you to entire composition with the flora and its success.
Many crops such as tomatoes and lettuce give higher yield when grown in greenhouses. To create the vacuum, hold one finger over the narrow part of the 2110 Words 9 Pages Biology Coursework ¡V Does The Light Intensity Affect the Rate of Photosynthesis The Investigation In this experiment I will investigate the affect in which the light intensity will have on a plants photosynthesis process. When other factors are not limiting, the rate of photosynthesis increases almost linearly with increase in light intensity. Light intensity and carbon dioxide concentration are both obvious limiting factors, as they are both inputs into the reaction. · Carbon dioxide- by not adding any thing in the water which increase the carbon dioxide level, such as Hydrogen carbonate. Light quality Photosynthesis occurs only in the visible spectrum of light, the wavelength of which ranges from about 400 nm to 750 nm different wavelengths of light, i. Measure 10cm between the boiling tube containing the Elodea plant and the lamp.
Photosynthesis is the reason that the Sun's energy is able to spark life on Earth. Water may be a limiting factor in some very specific climates and plant types, however. Without the necessary nutrients, such as oxygen, carbon dioxide, or glucose, a cell cannot perform respiration. Lesson organisation The work could be carried out individually or in groups of up to 3 students counter, timekeeper and scribe. Factors affecting the rate of photosynthesis The term rate always involves time, so the rate of photosynthesis can be considered to be how fast photosynthesis takes place. The rest of the tree, bark etc.
The quality of my result was quite high because I only had 2 anomalous results which's percentage of errors were not too great but 1 was over 10% and may be considered invalid but apart fro this most of my results are valid. Carbon dioxide concentration Sometimes photosynthesis is limited by the concentration of carbon dioxide in the air. For instance, green light is not as helpful to plants because most plants reflect green and barely absorb it. Class practical In this experiment the rate of photosynthesis is measured by counting the number of bubbles rising from the cut end of a piece of Elodea or Cabomba. The environmental conditions to which your experimental leaves are exposed will have marked effects upon the photosynthetic rates which you measure. Same thing happens when plants are transferred from dark to light. The actual requirement of the light intensity for maximum photosynthesis in a plant depends on the type of plant and also on its habitat.
It is still a requirement, however, and if we deprive plants of carbon dioxide in the lab, we find a similar relationship to that of light. O 2 release will stop and a dramatic increase in O 2 uptake will begin. For the water to be transported through the plant, surface tension, adhesion and cohesion are important as it holds the water together and attached to other surfaces. When the concentration of the reactants such as the enzyme catecholase, and the substrate catechol were tested, the results of product formation increased greatly because the higher concentrations… 1477 Words 6 Pages Introduction: In biology, one of the factors that characterize a living organism is its ability to carry out necessary chemical reactions for its survival. The Co2 combines with existing molecules to produce organic aids, trapping the carbon within the leaves. If I had turned the security lights on my house on, the plants in my garden might possibly have photosynthesised faster. Thus the rate of photosynthesis increases with an increase in light intensity.