EXERCISE 6 – Effect of light intensity on photosynthesis With the increase of CO 2 in the plant cell environment, which reaction would you expect to be affected, the light dependent or the light independent? Investigating the rate of photosynthesis This is an example of a common experiment used to investigate light intensity and the rate of photosynthesis. The rate of photosynthesis decreases indefinitely with light intensity. Photosynthesis - Photosynthesis - Carbon fixation in C4 plants: Certain plants—including the important crops sugarcane and corn (maize), as well as other diverse species that are thought to have expanded their geographic ranges into tropical areas—have developed a special mechanism of carbon fixation that largely prevents photorespiration. if the rate of photosynthesis exceeded the rate of aerobic cellular respiration, then you would expect the atmospheric amount of oxygen to increase. If you wanted to increase the rate of photosynthesis in a plant, you would develop a plant with which of the following characteristic using immobilised algae), via the production of oxygen in pondweed, via the increase in dry mass, and via the production of carbohydrates. If you continue to increase the intensity of light that a plant receives, what happens? Abstract: During photosynthesis plants take light energy and turn it into chemical energy. This increase follows Vant Hoffs law. How can greenhouses increase the rate of photosynthesis? Refer to Figure 1, the rate of photosynthesis increases linearly with increasing light intensity (from point A to point B on the graph). Carbon dioxide is one of the reactants in photosynthesis. Light energy absorbed by chlorophyll is converted to ATP and H+; At very low light levels the plant will be respiring only not photosynthesising. A comprehensive database of photosynthesis and cellular respiration quizzes online, test your knowledge with photosynthesis and cellular respiration quiz questions. Log in for more information. You should already know that photosynthesis is the chemical reaction which ... we might expect to get a graph of results like this: If you look at the graph, you can see what happens in this sort of experiment. Our online photosynthesis and cellular respiration trivia quizzes can be adapted to suit your requirements for taking some of the top photosynthesis and cellular respiration quizzes. Be much slower because green light does not stimulate photosynthesis. The purpose of the study was to test the effect of various lighting conditions on the rate of photosynthesis. Factors Affecting Photosynthesis A limiting factor limits the rate at which a process can take place. It is a well-known phenomenon that plants (higher plant leaves) may absorb a lot (30% and more) of incident solar radiation in far-red and near-infrared resions of the spectrum (> 700 nm). Factor # 3.Supply of Oxidisable Food: Increase in soluble food content readily available for utilisation as respiratory substrate, generally leads to an increase in the rate of respira­tion up to a certain point when some other factor becomes limiting. Photosynthesis hardly starts at about 5°C in tropical plants. During photosynthesis in green plants, light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds. This is despite the increase of carbon dioxide diffusion into leaves. Photosynthesis, the process by which green plants and certain other organisms transform light energy into chemical energy. The photosynthetic capacity of leaves varies greatly during their development. Photosynthesis is the basis of plant growth, and improving photosynthesis can contribute toward greater food security in the coming decades as world population increases. If the concentration of carbon dioxide is increased, the rate of photosynthesis will therefore increase. A. 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. Repeat at different temperatures: 0°C - surround the beaker with an ice jacket; greater than room temperature (25°C, 30°C, 35°C, 40°C, 45°C, etc.,) by using a hot plate. The Effect Of Photosynthesis On The Rate Of Photosynthesis 1660 Words | 7 Pages. Gradually the rate falls and at a certain light intensity, the rate of photosynthesis remain constant (from point B to point C on the graph). This investigation will be focusing on which wavelengths of visible light, colour of light, has the highest rate of photosynthesis. The amount of atmospheric oxygen remains pretty steady. Processes such as photosynthesis are made up of a series of small reactions. Explanation . We'll begin with photosynthesis. At a temperature above 104 degrees Fahrenheit – 40 degrees Celsius – the enzymes that carry out photosynthesis lose their shape and functionality, and the photosynthetic rate declines rapidly. the rate of photosynthsis increases with increase in the amount of carbon dioxide. Controlling and trapping heat to increase photosynthesis. Explain. It is the slowest of these reactions that determines the overall rate of photosynthesis. In oxygenic photosynthetic organisms, including higher plants, the source of reducing equivalents is H 2 O, releasing O 2 as a by-product. answer choices . Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that can later be released to fuel the organisms' activities. If carbon dioxide is completely removed from a plant’s environment, what would you expect to happen to the plant’s production of high-energy sugars (rate of photosynthesis)? Even when the rate of photosynthesis declines in transgenic tobacco plants growth may not decline because SLA can increase and can partly compensate for the decreased rate of photosynthesis (Fichtner et al., 1993), although this may vary with light intensity (Stitt et al., 1991). The three inputs are light, carbon dioxide (CO2), and water, and the outputs are carbohydrates, oxygen, and water. Multiple targets have been identified that could be manipulated to increase crop photosynthesis. To begin with, as you increase the concentration of X, the rate of Z production increases. The rate of photosynthesis is measured by one of the following methods: By measuring (I) the volume of CO, consumed (2) volume of oxygen liberated (3) amount of carbohydrate accumulated. There for the rate of photosynthesis will decrease proportionally with the distance of the light from the plant (in this case a half). answer choices The rate of photosynthesis increases at the lower intensities of light and decreases at its higher intensities. Photosynthesis increases with rise in temperature up to 25°C. This should help you understand how to … In the first part of lab you will explore how photosynthesis varies with light intensity in leaves of your plant species. Photosynthesis is the process by which plants convert three inputs into three outputs. By measuring the rate at which these gases are exchanged, the rate of photosynthesis can be determined. A brief outline of various ways to measure the rate of photosynthesis - including measuring photosynthesis via the uptake of carbon dioxide (e.g. this however happens to to a certain maximum level of carbon dioxide beyond which the rate remains constant. Explain your answer. 1. I would expect the light dependent to be affected because the reaction will speed up the photosynthesis. Photosynthesis Investigation to find effects of distance of a light source from pond weed has on the amount of oxygen produced Photosynthesis All green plants need to be able to make their own food.They do this by a process called photosynthesis.For photosynthesis to occur they need sunlight energy.This energy is absorbed by a green pigment called chlorophyll,which is mainly found in … As the light intensity increases, the rate of photosynthesis increases.However, the rate will not increase beyond a certain level of light intensity. This is the rate of photosynthesis at that particular temperature. If you wanted to increase the rate of photosynthesis in a plant, you would develop a plant with: many, broad leaves. The temperature coefficient (Q 10) of respiration within the temperature range of 0-35°C appears to be about 2.0 to 2.5.. 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. The law of limiting factors is expressed as: At any given moment, […] The gas should be checked to prove that it is indeed oxygen - relights a glowing splint. Differences occur in rates of photosynthesis of juvenile and adult leaves and in adult leaves of different ages. b) Respiration would occur when illumination is at 100% as plants respire at all times. a) The net photosynthesis rate is - the carbon fixation rate minus the rate of CO2 loss in respiration. A. a strong, thick stalk B. bright flowers to attract bees C. many, broad leaves D. short, narrow leaves What would you expect to happen to the rate of photosynthesis if you exposed a plant to an environment in which only green light was present? You will measure CO 2 consumption in plant leaves using an If you wanted to increase the rate of photosynthesis in a plant, you would develop a plant with which of the following characteristics? OXYGEN EVOLVED. But it doesn't. It this case, number of bubbles of oxygen are counted given out in unit time by green aquatic plants like Hydrilla. 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. Added 10 days ago|1/11/2021 1:49:16 AM To increase one or decrease one would have a correlating effect on the rate of photosynthesis. Photosynthesis is the process by which organisms convert light energy into chemical energy in the form of reducing power (as NADPH or NADH) and ATP, and use these chemicals to drive carbon dioxide fixation and reduction to produce sugars. It is the simplest method. 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