What are some factors that affect photosynthesis. Factors That Affect the Rate of Photosynthesis 2019-01-14
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Factors affecting photosynthesis rate in a plant
Light : A study of the effect of light on the rate and quantity of photosynthesis would have to include light reflected, absorbed and transmitted; intensity, quality and duration of available light, and destructive effects of light. Different types of plants have different optimum temperatures for photosynthesis; plants that live in colder climates have an optimum rate at a lower temperature. Between 0oC and 25oC the rate of photosynthesis is approximately doubled for each 10oC rise in temperature. Chemical Compounds : Many different kinds of chemical compounds have direct or indirect effect upon the rate of photosynthesis. There is a point in light intensity where there is no gaseous exchange in photosynthesis. According to this law the rate of chemical reaction doubles for every rise of 10°C.
For example, on bright sunny days the carbon dioxide concentration of the atmosphere is usually the limiting factor, not light intensity. You can both ask and answer questions, and teachers will get back to you. In general, all essential elements affect the rate of photosynthesis. In a process like photosynthesis which is affected by more than one factor, its rate is limited by the factor which is closest to its minimum value. A nutrient-poor environment would result in slower rates of repair of proteins and cell structures within the plants, so, for example if you were to combine very high irradiance with nutrient-poor soil or water then you will find plant cells that will struggle to recover. Emerson 1929 observed a direct relationship between chlorophyll content of the leaf and the rate of photosynthesis. The rye then stays level regardless of further increases in light intensity 1.
It starts after some time. This is because photosynthesis involves the operation of enzyme … s, which are affected by many factors, such as changes in pH. You should be able to explain how each of these has their effect on the rate of photosynthesis. Removal of carbon dioxide from the water raises the pH levels, as a result of the reduction in carbonate and bicarbonate levels of water, since they are used to replenish the lost carbon dioxide. Planting trees and other plants is one component of the solution to global warming, but the number of plants we have now cannot consume more carbon than they already do, and there is some evidence that warmer temperatures make photosynthesis more difficult. Neutral or lower water pH decreases the growth of algae.
Literature values for photosynthetic rates in Cladophora glomerata vary widely. Temperature - the rate of reaction increases; with heat the molecules move about and come together faster. Nutrient status: are the plants in a nutrient-rich or nutrient-poor environment. Oxygen: Oxygen has been shown to inhibit photosynthesis in C 3 plants while C 4 plants show little effect. Algae also take up excess nutrients such as phosphate, ammonia and nitrate, which can intoxicate marine life from the water. This further complicates estimates of net photosynthesis.
Photosynthesis is the reason that the Sun's energy is able to spark life on Earth. The explanation of this seems to be that oxygen actually exerts as direct inhibitory effect on photosynthesis, and the greater the concentration of oxygen the greater this effect. Narcotics such as chloroform, ether and urethans, exert retarding or inhibitory effects on photosynthesis when present in very low concentrations. Plants of cold climates photosynthesise at much lower temperatures than do those of warm climates. The maintenance of such a dynamic equilibrium between the oceans and the atmosphere is the principal factor for the constant value of carbon dioxide concentration of the atmosphere. However, just like us, plants are sensitive to temperature too. Too cold and their productivity slows down to zero.
Some Factors Affecting Photosynthesis and Respiration Measurements in Cladophora Glomerata
As with light, providing more carbon dioxide will lead to more photosynthesis. On the other hand algae in the water of hot springs may carry on photosynthesis at a temperature as high as 75°C. Growers use information about limiting factors to increase plant growth Commercial growers know the factors that limit plant growth. Arnon 1954 has demonstrated that cell free chloroplasts are capable of carrying out photosynthesis. The chemical reaction also produces oxygen, which is released back into the atmosphere. The rate peaks at a certain temperature, at which many of the enzymes that catalyze the reactions become ineffective.
This assimilation number is the number of grams of carbon dioxide per hour per gram of chlorophyll. The optimum pH for most algae species is 8. Optimum or saturation intensities may vary with different plant species e. Thus the chloroplasts are the complete photosynthetic units. Limiting to photosynthesis at extremely high light intensity, when leaves are unable to utilize the absorbed light, the rate of photosynthesis declines by a phenomenon called photo inhibit! Among these chemical compounds are hydrocyanic acid, hydroxylamine, hydrogen sulphide and certain compounds containing the iodoacetyl radical. Nutrient Supply: Among various nutrients, nitrogen has direct relationship with photosynthesis.
What factors affect that rate of photosynthesis Flashcards
This is demonstrated by the work of McAlister and Myers 1940 showing the effect of high and low concentrations of oxygen on the rate of photosynthesis of wheat plants. This is because the light now becomes the limiting factor. When a water deficit occurs in a plant it causes the closing of the stomata, and therefore, there is a decrease in the absorption of carbon dioxide. Thus the rate of photosynthesis increases with an increase in light intensity. The chlorophylls absorb heavily in the blue and red region of the spectrum and β-carotene mostly in the blue region. Intensity of Light The effect of light intensity depends upon the photophilous sun-loving plants or sciophilous shade-loving plants nature of plant.
