The Discovery of Oxygen - Julian Rubin
This video explains how light intensity, temperature and carbon dioxide are factors that can limit photosynthesis
Free rate of photosynthesis Essays and Papers - …
So how can these factors have an effect on the rate of photosynthesis? Lets start off with the light intensity. When the light intensity is poor, there is a shortage of ATP and NADPH, as these are products from the light dependent reactions. Without these products the light independent reactions can't occur as glycerate 3-phosphate cannot be reduced. Therefore a shortage of these products will limit the rate of photosynthesis. When the carbon dioxide concentration is low, the amount of glycerate 3-phosphate produced is limited as carbon dioxide is needed for its production and therefore the rate of photosynthesis is affected. Finally, many enzymes are involved during the process of photosynthesis. At low temperatures these enzymes work slower. At high temperatures the enzymes no longer work effectively. This affects the rate of the reactions in the Calvin cycle and therefore the rate of photosynthesis will be affected.
Ecological events and their outcomes, such as growth, reproduction, photosynthesis, primary production, and population size, are often regulated by the availability of one or a few factors or requisites in short supply, whereas other resources and raw materials present in excess may go partially unused. This principle has become known as the "law of the minimum" (Liebig 1840). For instance, in arid climates, primary production (the amount of solar energy trapped by green plants) is strongly correlated with precipitation (Figure 5.1); here water is a "master limiting factor." Of many different factors that can be limiting, frequently among the most important are various nutrients, water, and temperature.
An Experiment to Investigate the Effect of Light …
This process is also affected by the temperature surrounding the plant (the species of plant we experimented with, pond weed, photosynthesised best at around 20 degrees centigrade.) Light, temperature & CO2 are known as limiting factors, and each is as important as the next in photosynthes...
A limiting factor is a factor that controls a process. Light intensity, temperature and carbon dioxide concentration are all factors which can control the rate of photosynthesis. Usually, only one of these factors will be the limiting factor in a plant at a certain time. This is the factor which is the furthest from its optimum level at a particular point in time. If we change the limiting factor the rate of photosynthesis will change but changes to the other factors will have no effect on the rate. If the levels of the limiting factor increase so that this factor is no longer the furthest from its optimum level, the limiting factor will change to the factor which is at that point in time, the furthest from its optimum level. For example, at night the limiting factor is likely to be the light intensity as this will be the furthest from its optimum level. During the day, the limiting factor is likely to switch to the temperature or the carbon dioxide concentration as the light intensity increases.
IB Biology Notes - 8.2 Photosynthesis
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).
Predicting photosynthesis: Students draw out predicted graphs for light intensity, CO2 level and temperature during a typical day in a named month of the growing season. Explain the shapes of these graphs, bearing in mind effects of respiration. Contrast with an early spring or late autumn day. This will lead on to the topic of and is suitable for students of higher level
Presentation: Create a presentation on how to grow a plant in the best possible conditions. Students must make a reference to each limiting factor as well as any additional knowledge that they might have. Presentations may talk about fertilisers, which relates to the topic . Suitable for students of all levels
Activity: Students try and design a way to grow crops for a manned moon-base. They will essentially create a greenhouse which can provide a suitable amount of each limiting factor required for photosynthesis. Students may even add additional features to their "space farm". Suitable for students of lower level and SEN
Chemistry for Biologists: Photosynthesis
Plant Energy Transformations-Photosynthesis - …
Photosynthesis - Wikipedia
Water Research Center - Phosphate in Water
The Discovery of Oxygen Hands On Activity: Repaet Carl Wilhelm Scheele and Joseph Priestly Experiments
UC Berkeley - The Tundra Biome - UCMP
Pearson - The Biology Place
Tundra is the coldest of all the biomes
where max is the maximum stomatal conductance. The other functions are limiting factors of max and are scaled from 0 to 1. min is the minimum stomatal conductance and is set to 0 in this study because we could not get data of min from the literatures. phen is the variation in stomatal conductance with leaf age, and light, temp, VPD, and SMD are functions of photosynthetically photon flux density at the leaf surface (PPFD, μmol photons m-2 s-1), temperature (T, °C), vapor pressure deficit (VPD, kPa), and volumetric soil water content (θ, m3 m-3), respectively.
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