In plant photosynthesis, the energy of light is used to drive the oxidation of water (h 2 o), producing oxygen gas (o 2), hydrogen ions (h +), and electrons most of the removed electrons and hydrogen ions ultimately are transferred to carbon dioxide (co 2 ), which is reduced to organic products. B increases in light intensity cause increases in temperature c as the rate of photosynthesis increases, the temperature of a plant eventually decreases d the rate of photosynthesis is affected by changes in the environment. Rates were measured while net photosynthesis rates were kept constant by increasing c02 concentration (no 14) or lowering 02 concentration (no 8) while light intensity was varied. The number of light photons hitting the chlorophyll pigments increase as the light intensity rises this in turn increases the rate of photosynthesis the whole process is so effective that in optimum conditions 90 percent of light is absorbed.
Subject to physiological limits, an increase in the intensity of light will result to an increase in the rate of photosynthesis and will likewise reduce the number of hours that the plant must receive every day (manaker 1981. Biology coursework ðžv 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. Sun plants experience an increased rate of photosynthesis as light intensity increases leaves on a sun plant tend to be smaller and thicker, with more pronounced lobes than shade plant leaves special cells in these leaves allow higher rates of photosynthesis. Altering the wavelength can also affect the rate of photosynthesis for instance, plant growth is poor under green lights as most of the light is reflected ==co~2~ concentration== increasing co~2~ will increase the rate of photosynthesis, but only up to a certain point.
Light energy is needed for photosynthesis, so as the light intensity increases, the rate of photosynthesis chemical reactions steadily increases in a linear manner - 1st part of the graph is 'light limiting. This is because photosynthesis is a reaction, which needs energy from light to work, so as the amount of energy available from light increased with the rise in light intensity, so did the amount of oxygen produced as a product of photosynthesis. At low intensity of light,when the light intensity inscreases then the photsyntesis rate will also increase together with other factorswhen there is more light that is being absorbed by the plant, the greater the rate of photosynthesis and the production of chlorophyll. The rate of photosynthesis increases linearly with increasing light intensity (from point a to b on the graph) gradually the rate falls of and at a certain light intensity the rate of photosynthesis stay constant (from point b to c on the graph.
Prediction i predict that as the light intensity increases that the rate of photosynthesis will increase in proportion, so for example if you increase the light intensity from 10cm away to 20 cm away form a stationary plant. Light intensity: increasing light intensity increases the rate of photosynthesis up to a point where a plateau is reached at this point enzymes have reached their maximum rate of reaction and. Factors affecting the rate of photosynthesis are 1) light intensity: - the brightness which increases the rate ofphotosynthesis if increased 2) light. Students will first conduct a baseline test of the rate of photosynthesis under standardized conditions (neutral water & 10 cm light source) c students will first peel the leaves off of the stem of the elodea and.
The rate of this process is highly dependent on the light quantity the photosynthesis rate is higher as the photosynthetic active radiation (par) increases the carbohydrates produced during photosynthesis are stored and used by the plant as a food source. When the light intensity was increased to above 1000 μmol photons m −2 s −1, cells displayed evidence of photodamage however, these cells also maintained the maximum level of photosynthesis efficiency and respiration possible, and the growth rate increased as light intensity increased. The rate of photosynthesis increases at the lower intensities of light and decreases at its higher intensities when intensity of light is high, the temperature is higher and hence transpiration increases which leads to closing up of stomata and thus the photosynthesis decreases. The reason that light intensity does affect the rate of photosynthesis is because as light, and therefore energy, falls on the chloroplasts in a leaf, it is trapped by the chlorophyll, which then makes the energy available for chemical reactions in the plant. As intensity of light increases, the leaf cells start pumping k+ ions out of the guard cells which causes water to travel in the guard cells of the stomata through osmosis.
The rate increases at a steady rate as the light intensity increases until near the end of each line where the rate of increase decreases this is either because the photosynthesis reaction has reached it's maximum rate of reaction or another factor is limiting the rate. The compensation point is the light intensity at which the rate of photosynthesis is equal to the rate of respiration a similar graph will be obtained if oxygen production is plotted against. If the concentration of co 2 is increased, the rate of photosynthesis will go up with the same light intensity clearly, co 2 is the limiting factor increase in the co 2 concentration till it attains 5 cc level will result in an increase in the rate of photosynthesis. As the light intensity increases the rate of photosynthesis follows (point b on the graph) this means more carbon dioxide is being absorbed by the plant for photosynthesis so this means more.
In contrast to wild type and ndhf fc, which reach the maximum photosynthetic rate in less than 1 min when light intensity suddenly increases, ndh defective plants (δndhf and t181a) show up to a 5 min delay in reaching the maximum photosynthetic rate at co 2 concentrations higher than the ambient 360 ppm. Photosynthesis exam skills light intensity account for the increase in the rate of photosynthesis in graph 1 when the temperature is raised from 20 degrees c to 30 degrees c. Design a series of experiments to determine how temperature and light intensity affect the rate of photosynthesis in spinach then develop a conceptual model that explains why these environmen.