Assuming all other factors remain constant same amount of carbon dioxide and water , which plant will have a high rate of photosynthesis? Similarly, cacti can also carry on photosynthesis at 55°C. However, after reaching an intensity of 10,000 lux lux is the unit for measuring light intensity there is no effect on the rate. When they live for more than one year, they tend to store this energy while they're dormant, for ready access in the spring. Photosynthesis does not take place in dark. However are some point all of the available electrons are excited, and the maximum rate or photosynthesis is reached. What factor most affects the rate of photosynthesis? Prepare your answers and get ready to share your answers with the class. This pushed the air bubble in the capillary tube down.
There is an initial increase in the rate of photosynthesis at this temperature. The light intensity, at which the photosynthetic intake of carbon dioxide is equal to the respiratory output of carbon dioxide is called the compensation point. The maximum light intensity that the plants can handle is therefore just below 400. Factors affecting photosynthesis — photochemical and dark reaction Photochemical reactions and dark reactions of photosynthesis respond differently to temperature. This is because another factor, which is now closer to its minimum level than light intensity, will be limitting the rate; for example carbon dioxide concentration or temperature. The students could develop this practical as an assessed investigation if they develop hypotheses and plan the experimental detail from the core protocol.
Carbon dioxide concentration will directly affect the rate of photosynthesis as it is used in the photosynthesis reaction. If it gets too hot the enzymes begin tolose their shape denature. If the temperature is too cold or too hot, plants struggle to photosynthesize. That these protoplasmic factors appear to be enzymatic is indicated by the fact that the capacity for photosynthesis is lost at temperatures above 30°C or at strong light intensities in many plants even though cells are green and living. This is a 4 times rise which is quite large. The plants of cold and temperate regions have lower values of these cardinals. By using a different piece of elodea for each experiment did create the problem of it being impossible for each piece to have the same surface area.
As predicted when the light intensity increases so does the rate of photosynthesis. But tropical plants have higher sable of these cardinals. It becomes maximum at bright daylight. This also stops gas exchange which slows photosynthesis even further. The increase in the amount of carbon dioxide increases the photosynthesis.
Opening and closing of stomata is controlled by specialized cells called guard cells. Very high intensity may, in fact, slow down the rate as it bleaches the chlorophyll. This is a brief introduction. This is the mean rate of bubble production. Thus light is not a limiting factor at high intensity. So, if the temperature of the organism's environment is too high or low, the rate of photosynthesis will decrease because the enzymes aren't working properly. This is usually the rate-limiting step in natural settings.
All this has been possible so far with the understanding of the photosynthesis. Select your answer by clicking on the appropriate letter How will stomate closure affect photosynthesis? This is because in a variegated leaf the cells either contain chlorophyll or they don't. The rate of photosynthesis increases linearly with increasing carbon dioxide concentration from point A to point B on the graph. It is found that even slight deficiency of water results in significant reduction in the crop yield. Clearly, the chlorophyll in the green leaves is surplus. The decline may be due to one or more of the following causes: i Accumulation of the end products of photosynthesis. But it slows down beyond this point.
They will therefore be more likely to join onto the enzymes and react. Factors Affecting Photosynthesis By understanding the factors that affect photosynthesis, one can better understand the rate of the process. Disclaimer This is a real A-level school project and as such is intended for educational or research purposes only. They affect the dark reactions. Scientists are constantly working towards developing new varieties of crops which give better yield of crops. Duration: In general, a plant will accomplish more photosynthesis when exposed to long periods of light.
You should be able to explain how each of these has their effect on the rate of photosynthesis. These factors are: i Different leaves have different thickness of the cuticle and epidermis. The plant can then be exposed to varying intensities and colors of light. Desert plants like cactus can carry on photosynthesis even at 55°C b Optimum: Maximum photosynthesis occurs at that point The optimum temperature also varies greatly. They contain all the necessary enzymes.
The students can be allocated to investigate a particular factor that affects the rate of photosynthesis, or they can choose from this list, or they can develop their own ideas. Above 25-30°C the maximum rate is not maintained as the time factor begins to operate and the optimum temperature is reduced from 37°C to 30°C. Group 7, Group 8 and Group 9 Question 3: Plant A and plant B are placed in a room with direct sunlight. Besides plants are the only living organism capable of manufacturing their own food. It may be stated that direct effect of O 2 on photosynthesis remains to be understood. This indicates that protoplasm is not necessary for photosynthesis.
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. They contain all the necessary enzymes. Thus some internal factor is present in the protoplasm of the cells. How would you predict that adaptation to sun or shade might affect the response curves? Wavelengths of light emanating from tungsten, fluorescent bulbs are markedly different than for natural sunlight, and as a result, the rates of photosynthesis measured under artificial light sources will be different that those observed under the sun. This is accomplished by opening and closing pores, called stomata sing. Temperature : Like all chemical reactions, lower temperat … ures speed down the rate. If plants have less light, they photosynthesize more slowly.