How Does The Color Of Light Affect The Rate Of Photosynthesis

This carbon dioxide will be supplied by sodium bicarbonate dissolved in the water with the plant leaf disks. []Martineau et al. (loses red first, green later) SCUBA diver? Color of blood. Generally speaking, photosynthesis of a plant will increase with an increase in temperature. The proportion of lighting absorbed by plants at photosynthesis differs for the color of the lighting. It is suggested that C 4 plants have photorespiration and high O 2 stimulates it. It is the factor you are testing. Increasing the light intensity will boost the speed of photosynthesis. In the equation above we can see that plants need not only a light source of sufficient intensity and the correct wavelengths for photosynthesis, but also a supply of carbon dioxide and water. And the temperature can affect the rate of photosynthesis because if it's too cold or too hot the plant that is apart of photosynthesis will die out. How does the temperature effect the rate of photosynthesis? Yong Clement 10 rho Problem QuestionHow does the temperature affect the rate of photosynthesis?HypothesisWhen the tempreture is too low, enzymes do not react with molecules as frequent, and when the tempreture is too high, the enzyme denatures and cannot function properly. This in turn increases the rate of photosynthesis. Variables Affecting Rate of Photosynthesis Environmental Variables Plant or Leaf Variables Method Variables (These variables may not affect photosynthesis but are still important to investigate. The color you observe is a complement to the color the object absorbs. While sunlight is composed of many different wavelengths of light, not all wavelengths are equally available to a plant. Essentially, light energy is a crucial factor in photosynthesis hence the need to test for the difference in the light spectrum. The rate also varies by species and a plant’s health and maturity. Photosynthesis. Hence, this article lists some of the factors that can affect the process of photosynthesis. As soon as light enters the water, it interacts with the water molecules and suspended particles to cause loss of light, colour changes, diffusion, loss of contrast and other effects. Driving Question Does the color of light affect the rate of photosynthesis in green leaves?. Chlorophyll of plants absorb red light best (most efficiently) and that means red light has the best photosynthesis light. Results may vary. As with many. Photosynthesis: Overview of the light-dependent reactions. ) • Light intensity (brightness) • Light color (How can students explain that plants are green and that chlorophyll does not absorb green. Chlorophyll enables the process of photosynthesis by which a plant produces the food material (carbohydrates) it needs to function using energy from sunlight, carbon dioxide from the air and water from the soil. How does light intensity affect the rate of photosynthesis?. Since the photosynthesis takes place in chloroplast that has chlorophyll, the rateof photosynthesis is affected by the color of light as the amounts of light. Plants obtain light energy from the sun. Key Concepts: ' Green plants and other photosynthetic organisms trap light energy and synthesize carbohydrate molecules via metabolic processes. Light wavelength. The hypothesis was; different wavelengths. That mean the rate of photosynthesis also decreases in this graph. What are 4 factors that affect the rate of photosynthesis? Wiki User 2010-11-09 19:28:35. When light strikes the chloroplasts, the DPIP is reduced by the excited electrons from chlorophyll, and it changes from its original blue color to colorless as it accepts the electrons. 02 Discussion answers and preparation 15. To do this job, the. This is the currently selected item. Which of the following colors of light would have the lowest rate of photosynthesis a. 2005), and probably. Maybe a blockout of sunlight or not enough access to water and. This chemical energy is stored in carbohydrate molecules, such as sugars, which are synthesized from carbon dioxide and water - hence the name photosynthesis, from the Greek phōs (), "light", and sunthesis (σύνθεσις. How does the color of light affect the rate. More light will result in an increased rate of photosynthesis. Chlorophyll, the pigment that absorbs light energy so it can be used for photosynthesis, is highly effective from 400-500 nanometers (blue and purple colored light). Photosynthesis is a process that uses the energy in light rays to converse raw material (water and CO2) into chemical energy. Chlorophyll in the plant is the pigment that absorbs light. In contrast, blue light is considered equally effective as green or red light at driving photosynthesis. As soon as light enters the water, it interacts with the water molecules and suspended particles to cause loss of light, colour changes, diffusion, loss of contrast and other effects. Factors Affecting the Rate of Photosynthesis Light intensity – the greater the intensity of light, the greater the rate of photosynthesis Concentration of carbon dioxide – an increase in carbon dioxide will increase the rate of photosynthesis Temperature– enzymes work optimally at 37°C. The inputs are carbon dioxide, water, and light energy. Plants obtain light energy from the sun. Light supplies the power to carry on photosynthesis, the food-making process in leaves. EXERCISE 1: Photosynthesis and light Plant cells convert carbon dioxide into carbohydrates in a process called photosynthesis. Plants deprived of light will lose their color and die. The light intensity range for most plants falls between 1,200 and 2,000 lumens (measurement of light intensity). Maximum rate of Photosyñthesis is found in red light, average in blue light and minimum in. Photosynthesis is one of the most important anabolic chemical reactions that allows life to exist on Earth. Principle 2 : Photosynthesis needs light energy to drive the reaction. A pigment is a material that changes the color of reflected or transmitted light as the result of wavelength-selective absorption. In this experiment, we are going to define the connection between rate of photosynthesis and light wavelength to limit color (wavelength) of light which plant (leaf) can absorb for photosynthesis. Photosynthesis takes place in two stages: the light-dependent reactions and the Calvin cycle. Cool fluorescent light is great for cultivating plant growth indoors. The wavelength one is trickier. Driving Question. Number of chloroplasts. Although this graph is not perfect, it does show how the rate of photosynthesis varies at different light wavelength. They absorb blue light and appear yellow, red, or orange to our eyes. Effect of colour of light on the rate of photosynthesisIntroduction In photosynthesis, plants, some bacteria use the energy from light to produce sugar,which cellular respiration converts into ATP. The color you observe is a complement to the color the object absorbs. If you look at absorption spectrum of a chlorophyll, you'll see that it absorbs red and blue light the most, and does not absorb any of green light. For each graph below, describe the reasons that the rate of photosynthesis changes: 19. The plants with the blue color of light seem to grow the tallest, with 0. The reason that green plants appear that color is that they reflect that color in the light spectrum. 16 Respiratory activity in maize seedlings Maize grains and seedlings are immersed in tetrazolium chloride solution for 30. Measuring the effects of light color on photosynthesis is a fun and simple experiment for middle or high school students. 03 Illustrations All zipped. 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. Determine which conditions are ideal for photosynthesis, and understand how limiting factors affect oxygen production. For our experiment, we are testing the growth of algae in high intensity light, control light (room light), no light, and blue light by measuring cell count and chlorophyll a that the algae produced under each condition. Biology Photosynthesis Trivia. The Effect Of Red Light Treatment On The Rate Of Photosynthesis. It gets maximum in red-orange wavelengths. Visible light is a form of electromagnetic radiation with wavelengths. The wikipedia page on photosynthesis goes into a lot more detail. 032% by volume of carbon dioxide is present in the atmosphere and at this low level it acts as a limiting factor. Though overexposure to radiation in the UV light spectrum is dangerous for the flora, small amounts of near-UV light can have beneficial effects. This is the currently selected item. Theory: Before I predict what will happen I must look at how photosynthesis occurs. What does the color change indicate in terms of the Elodea plant? It took from 45 minutes to an hour for the phenol red to change from yellow back to a reddish color. How a Plant Uses Glucose. Remember, check all project ideas with your teacher and parents, and don’t do any project that would hurt or scare people or animals. Photosynthesis Lab. Explain how light energy affects a chlorophyll molecule. The hypothesis was; different wavelengths. Photosynthesis is driven by the energy in light. the light color has a major effect on the rate of photosynthesis -- oxygen production is high for orange and blue light and low with purple, green, and red light. []Martineau et al. Light intensity has a very large effect on the rate of photosynthesis. The light was turned off at 150 min. Some cyanobacteria overcome this challenge by expressing paralogous photosynthetic proteins and by synthesizing and incorporating ~8% chlorophyll f into their Photosystem I (PSI) complexes, enabling them to grow under far. Use the absorption spectrum for chlorophyll a and chlorophyll b (Fig. What are 4 factors that affect the rate of photosynthesis? Wiki User 2010-11-09 19:28:35. How does temperature affect the rate of photosynthesis? 28. How a Plant Uses Glucose. 01 Effect of light on shoots 15. An increase in light intensity will increase the rate of photosynthesis. So the colour of light affect the rate of photosynthesis. Okay, this is the hardest part of the whole project…picking your topic. Since the photosynthesis takes place in chloroplast that has chlorophyll, the rateof photosynthesis is affected by the color of light as the amounts of light. Additionally, low temperatures cause plants to grow poorly. It should be well-known that photosynthesis is the process through which plants use the energy of sunlight to convert water and carbon dioxide into high-energy carbohydrates- sugars and starches- and oxygen, a waste product. At a high light intensities photosynthesis reaches a plateau and so does not increase any more. The best wavelengths of visible light for photosynthesis fall within the blue range (425–450 nm) and red range (600–700 nm). Prior to the experiments, the oxygen content in medium-only flasks (free of algae) was measured as a baseline to remove any potential artifacts due to drifting of the OXY-4 probe and the f/2 medium. This is because these things are what a plant needs in order to photosynthesize. 1) the variables of light intensity, temperature, carbon dioxide, light quality all influence the rate of photosynthesis. Wavelength (nm) Photosynthetic Rate (O 2 ppt/min) 380 (violet) 2 420 (violet-blue) 43 460 (blue) 21 500 (green) 17 540 (green) 9 580 (yellow-green) 19. The hypothesis was; different wavelengths. It was observed that the red light showed the fastest rate of photosynthesis of the. For example, the wavelength of light affects the photosynthesis in plants. Because both colors let pretty much the same amount of red and blue spectrum through. The hypothesis was; different wavelengths. Respiration rates differ by the amount of activity and/or development the organism is going through. Which colors of visible light are most effective for photosynthesis in plants? _____ 2. How does temperature affect the growth of mold? 96. Essentially, light energy is a crucial factor in photosynthesis hence the need to test for the difference in the light spectrum. Green light can penetrate into the plant canopy better than blue or red light (Klein, 1992). The reduction of plant growth and activity would reduce the need. Driving Question Does the color of light affect the rate of photosynthesis in green leaves?. Each color of lights allows plants to grow better in some aspect. The best wavelengths of visible light for photosynthesis fall within the blue range (425-450 nm) and red range (600-700 nm). The Effect of Light Intensity on Photosynthesis Of Elodea Canadensis Introduction I wanted to find out how much the light intensity affected the Photosynthesis in Elodea Camadensa. When light and temperature are in balance, the level of ambient CO 2 will be the limiting factor. What are 4 factors that affect the rate of photosynthesis? Wiki User 2010-11-09 19:28:35. Most of the time, when the intensity of light is high, you will get a a greater rate of photosynthesis. The intensity of light, temperature, supply of carbon dioxide, supply of water, and availability of minerals are important factors that affect the rate of photosynthesis in land plants. Light independent reactions need more heat energy than nighttime temperatures often provide. Plants obtain light energy from the sun. 1) How does light intensity affect the rate of photosynthesis? 2) How does temperature affect the rate of photosynthesis? sunlight. The point where an increase in light intensity will not increase photosynthesis any more is called light saturation. "Sun plants" experience an increased rate of photosynthesis as light intensity increases. Pigments for Photosynthesis Photosynthesis in plants is dependent upon capturing light energy in the pigment chlorophyll, and in particular chlorophyll a. The process by which they do this is called photosynthesis. 40 to determine the range of wavelengths that corresponds to white light and to each color: red, blue, and green. The trees will rest, and live off the food they stored during the summer. According to Molina. T F Photosynthesis uses energy from ATP and high energy electrons from NADPH produced in the light-dependent reactions to make glucose in the Calvin cycle. Set the thermometer to 25°C (Room Temperature) and the light intensity to 20. However, more than 95% of it is made by steam reformation of fossil fuels, a process that is energy intensive and produces carbon dioxide. Light is made up of three different colors: red, blue and green. D and Alegrors (2009) without enough light a plant cannot photosynthesise very quickly even if there is plenty of water and carbon dioxide. Question: What color of light is the best for photosynthesis? Observe: The color of a light wave is determined by its. Tests at a plant research institute in Hampshire in the 1960s showed that plants grown out-of-season in greenhouses under sodium light grew barely any faster than similar plants without any sort of artifi. 01 Effect of light on shoots 15. Why does darkness affect the light-independent reactions of photosynthesis? Plants stop their daytime activities and rest during the night, much like animals do. 2002), recent reports indicate that the photosynthesis-dependent component exerts its effect independently of this well-known effect of photosynthesis to lower the. The color that has the highest influence on photosynthesis is blue, which is why many plant growers use blue lights to grow indoor plants. The researchers reasoned that at low light, photosynthesis is limited primarily by light, but when light is plentiful, leaf CO2 becomes the most limiting factor. "Sun plants" experience an increased rate of photosynthesis as light intensity increases. While plants take in all colors and wavelengths of light, some colors affect the plant species more than others (Sanchez, 2014). The hypothesis was; different wavelengths. Question: What color of light is the best for photosynthesis? 1. The form of light that plants capture, as well as the light that you and I can see, is called visible light. The timer in the square box can be used to measure 30 seconds. changing the color of the light. This low-energy light has a wavelength of 600-700nm. 3m from the light and the minimum rate of dye reduction is 0. Let’s look at each of the ways that greenhouse grow lights affect plant. Maximum rate of Photosyñthesis is found in red light, average in blue light and minimum in. The rate at which photosynthesis takes place varies depending on the intensity of light energy. Sort by: Top Voted. The fact that far-red light has precisely the contrary effect to that of red light makes it unsuitable as a light for growing. Why does darkness affect the light-independent reactions of photosynthesis? Plants stop their daytime activities and rest during the night, much like animals do. During the process of photosynthesis, oxygen is produced as a waste. Form hypothesis: Which color of light do you think will maximize the rate of photosynthesis? 3. Effect of Light Color on the Rate of Photosynthesis 1. Because photosynthesis uses CO2 to make energy in the presence of light and chlorophyll. Maybe a blockout of sunlight or not enough access to water and. photosynthesis in the presence of light, and the effect of specific ranges of wavelength (blue, green and red) on the rate of photosynthesis. SIMBIOS protocols K water = 0. This is the reason that plants appear green to us. The rate of photosynthesis is affected by the different wavelengths of light a plant is exposed to because different pigments in chloroplasts absorb different wavelengths for use in photosynthesis. On the other hand, low light intensity results in a lower rate of photosynthesis. Photosynthesis is a complex series of reactions that plants and algae use to convert light energy, water and carbon dioxide into glucose. Plant hormones respond to changing light conditions as the growing season progresses. Maximum rate of Photosyñthesis is found in red light, average in blue light and minimum in. That temperature is considered the optimum for many plants, and photosynthesis will not increase no matter how the temperature does. The key factors affecting the rate of photosynthesis are light intensity and colour, carbon dioxide concentration and temperature. Plant growth is affected by the color of different lights. Yellow or White Light Yellow light isn't the most effective part of the spectrum for plant growth, but it is still present in sunlight and so it's still important to ask the. Does The Color Of Light Affect Plant Growth? - Duration: 10:59. All of the colors are in white light. When a stoma opens, water vapor inside the leaf rushes out into the surrounding air (Figure 25), and a bubble of high humidity forms around the stoma. The color or wavelength of light does affect photosynthesis, which is how plants can basically create their own food. Test each type of plant and use the ruler to measure the. 5, 2016 — Plants use certain color pigments in order to convert light into energy by way of photosynthesis. The white light plants in the experiment averaged 23 leaves with a stalk height average of 13 inches. In the equation above we can see that plants need not only a light source of sufficient intensity and the correct wavelengths for photosynthesis, but also a supply of carbon dioxide and water. "Sun plants" experience an increased rate of photosynthesis as light intensity increases. While the outputs are glucose and oxygen. xanthophylls b. These are the wavelengths of light which provide the energy for photosynthesis. Other colours such as red, orange, yellow, blue, etc. In this experiment, the leaves will only rise to the surface when enough CO2 and light is present to allow the leaf disks to carry out photosynthesis and produce O2. When exposed to dim white light, however, the effectiveness of green light as a driver of photosynthesis diminishes greatly [13,33]. Photosynthesis is one of the most remarkable biochemical processes found on Earth and allows plants to use sunlight to make food from water and carbon dioxide. On a deeper level, other factors like amount of chlorophyll, availability of nutrients (eg Mg is needed for chlorophyll synthesis) will also affect the rate of photosynthesis, though these are rarely covered in discussion of this topic. Although it has been established that a lowered intercellular CO 2 concentration, brought about by vigorous photosynthesis, induces stomatal opening (Mott 1988, Roelfsema et al. The Effects of Light Color on the Rate of Photosynthesis in Living Leaves Abstract This lab investigation serves to study the factors that affect the rate of photosynthesis in living leaves. Red light absorbs more chlorophylls and uses them effectively as compared to other colors. Carotenoids (Figure 2) are yellow to orange in color. Based on the data, certain colors of light produced a greater rate of photosynthesis. The rate of photosynthesis is maximum in Red. Under laboratory conditions when light and temperature are not limiting factors, increase in CO 2 concentration in the atmosphere from 0. Effect ofColored Light on Stomatal Opening Rates of Viciafaba L. The rate of the tricarboxylic acid (TCA) cycle was reduced in these transformants, and there were changes in. Light independent reactions need more heat energy than nighttime temperatures often provide. Some of the light misses the leaf chloroplast, where the photsynthetic reactions occur, and much of the energy from light that is converted by photosynthesis to carbon compounds is used up in keeping the plant biochemical "machinery. In the light-dependent reactions, which take place at the thylakoid membrane, chlorophyll absorbs energy from sunlight and then converts it into chemical energy with the use of water. Photosynthetic Efficiency. Inferring A plant that has a high amount of the orange pigment, beta-carotene would have leaves of what color? Explain your answer. Image by Mell27. Based on the data, certain colors of light produced a greater rate of photosynthesis. Leaves on a "sun plant" tend to be smaller and thicker, with more pronounced lobes than shade plant leaves. Carotenoids (Figure 2) are yellow to orange in color. 3m from the light and the minimum rate of dye reduction is 0. The rate of the tricarboxylic acid (TCA) cycle was reduced in these transformants, and there were changes in. In this photosynthesis experiment, we are going to determine the effect of different light colors on the rate of photosynthesis. How does the color of light affect the rate of photosynthesis? In chloroplasts, the main pigment present is chlorophyll a. Blue light results in the highest rate of photosynthesis. Question: What color of light is the best for photosynthesis? 1. Photosynthesis is one of the most important anabolic chemical reactions that allows life to exist on Earth. Repeat until you've tried each. The graph shows that the distance from light intensity are increased when the rate of dye reduction decrease between 0. When light strikes the chloroplasts, the DPIP is reduced by the excited electrons from chlorophyll, and it changes from its original blue color to colorless as it accepts the electrons. We hypothesized that if green leaves have a significantly higher rate of photosynthesis (consumption of CO2) than yellow leaves, because green leaves contain more green chlorophyll a and chlorophyll b photosynthetic pigments than yellow leaves, then the. Photosynthesis is most efficient at light wavelengths between 400 and 500 nanometers and 600 to 700 nanometers. Thus, while blue light can appear somewhat dim to us, it has high energy and is useful for plant growth applications. Transgenic tomato ( Solanum lycopersicum ) plants expressing a fragment of the Sl SDH2-2 gene encoding the iron sulfur subunit of the succinate dehydrogenase protein complex in the antisense orientation under the control of the 35S promoter exhibit an enhanced rate of photosynthesis. Rates of photosynthesis peak in the blue-violet and red parts of. Availability of water b. slider back and forth and observe the effect on oxygen production. The concentration of CO2: Higher concentration of carbon dioxide helps in increasing the rate of photosynthesis. Plant hormones respond to changing light conditions as the growing season progresses. This is the currently selected item. Chlorophyll is green, and is responsible for the green color of foliage and leaves. Photosynthesis is the conversion of light energy into chemical energy. Background Research: A plant is a living organism. There are at least 600 known carotenoids, divided into yellow xanthophylls and red and orange carotenes. The main variables which affect photosynthesis are light, water, CO 2 concentration and temperature. Indoor-plant growers use blue light, because plants exposed to blue light grow better than plants exposed to other wavelengths. Some cyanobacteria overcome this challenge by expressing paralogous photosynthetic proteins and by synthesizing and incorporating ~8% chlorophyll f into their Photosystem I (PSI) complexes, enabling them to grow under far. Phototrophic organisms are superbly adapted to different light environments but often must acclimate to challenging competition for visible light wavelengths in their niches. How does light intensity affect the rate of photosynthesis? Poorly Pondweed Questions 1) How does light intensity affect the rate of photosynthesis? 2) How does temperature affect the rate of photosynthesis? sunlight carbon dioxide + water glucose + oxygen chlorophyll sunlight 6CO2 + 6H2O àààààà C6H12O6 + 602 chlorophyll Prediction. Question: What color of light is the best for photosynthesis? 1. While animals inhale oxygenand exhale carbondioxide,. Question: What color of light is the best for photosynthesis? Observe: The color of a light wave is determined by its. Graphs show that the higher the intensity, the higher rate of photosynthesis. The rate of photosynthesis will be measured by counting the number of oxygen bubbles produced by. Gather evidence of inputs and outputs of photosynthesis Grade level: Grade 7, 8. Light intensity, carbon dioxide levels, temperature, and wavelength of light can all be varied. The focus of this science fair project is how the color of an object affects its absorption of radiant energy. This range extends from violet (400nm) to red (700nm). Prior to the experiments, the oxygen content in medium-only flasks (free of algae) was measured as a baseline to remove any potential artifacts due to drifting of the OXY-4 probe and the f/2 medium. • To investigate the rate of oxygen production during photosynthesis • To measure the effect of wavelength of light on photosynthetic rate • To investigate starch production and storage in a single leaf. When light strikes the chloroplasts, the DPIP is reduced by the excited electrons from chlorophyll, and it changes from its original blue color to colorless as it accepts the electrons. To what extent does the coloring material of visible radiation have on the rate of photosynthesis onCabomba Aquaticaworkss? Background cognition: Photosynthesis is a procedure that occurs in all workss including bacteriums and algae. Review Variables. In this experiment, we are going to define the connection between rate of photosynthesis and light wavelength to limit color (wavelength) of light which plant (leaf) can absorb for photosynthesis. Does the same occur in aerobic respiration? What is the effect of these variations on glucose balance? In a photosynthetic organism, the rate of aerobic respiration can be superior, inferior or equal to the rate of photosynthesis. Other colours such as red, orange, yellow, blue, etc. The hypothesis was; different wavelengths. 1)? It is expected that green would be the most detrimental. For this experiment students will explore how to change the rate of photosynthesis in algae by using a variety of light sources and intensities. Does The Color Of Light Affect Plant Growth? - Duration: 10:59. Light is very significant to plants as it is the energy source that aids a chain of chemical reactions involve in the process of their food production called photosynthesis. 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. Be sure to keep the light intensity. It is known from the study of photomorphogenesis that green, red, far-red and blue light spectra have an effect on root formation, plant growth, and flowering, but there are not enough scientific studies or field-tested trials using LED grow lights to recommend specific color ratios for optimal plant growth under LED grow lights. Students will design experiments. carbon dioxide + water glucose + oxygen. Visible light is light that is detected by the naked human eye. Load More Trending Questions. Measuring the effects of light color on photosynthesis is a fun and simple experiment for middle or high school students. Part 2: Photosynthesis and Cellular Respiration Students explore the factors that may affect rates of photosynthesis and cellular respiration. Does The Color Of Light Affect Plant Growth? - Duration: 10:59. That temperature is considered the optimum for many plants, and photosynthesis will not increase no matter how the temperature does. Thus, any frequencies outside of a relatively narrow band will not be used for photosynthesis. Graph of the light compensation point and the light saturation point. Under laboratory conditions when light and temperature are not limiting factors, increase in CO 2 concentration in the atmosphere from 0. Prediction 1: When subjected to a range of salinities and light regimes in the laboratory, mangroves should achieve the highest rate of net photosynthesis at low salinity and the. changing the color of the light. Firstly, we will test if light is necessary for photosynthesis. However, it is often thought that the colour of light does influence the rate of photosynthesis. Fill a 250 ml Erlenmeyer flask to the 100 ml line with tap water, then add 5 ml of phenol. 2002), recent reports indicate that the photosynthesis-dependent component exerts its effect independently of this well-known effect of photosynthesis to lower the. The color of light affects the rate of photosynthesis when the production of oxygen increases at 450 nm (blue), drops, then rises again at 660 nm (orange). Check a photosynthesis action spectrum to see how light color or wavelength affects photosynthesis rate. Red and purple light exist on different ends on the obvious light spectrum. - Light Intensity Effecting Rate of Photosynthesis. By: Nicole Rossi and Emily Wang. The original purpose of this experiment was to see if light color has an affect on growth and phototropism of Lima been seedlings. Illumination of an intensity of 40,000 lux was supplied by tungsten lamps. effect of light intensity and inhibitors on the hill reaction Design and perform an experiment to determine the effect of light intensity and inhibitors on the Hill Reaction. This is because it's limited by other factors, such as the level of carbon dioxide in the air. In contrast, blue light is considered equally effective as green or red light at driving photosynthesis. ,) by using a hot plate. Take a look at the color wheel below. , light color, CO2 concentration, or pH) on the rate of photosynthesis. The colors indicate light intensity at four water depths: 0 meters 0. You already observed how light colors will affect the growth of a plant, in this simulation you can directly measure the rate of photosynthesis by counting the number of bubbles of oxygen that are released. You already observed how light colors will affect the growth of a plant, in this simulation you can directly measure the rate of photosynthesis by counting the number of bubbles of oxygen that are released. Obtain 3 pieces of Elodea about 6 cm in length and 2 pieces of aluminum foil. Color is a result of the wavelength of light reflected by that object. The hypothesis was; different wavelengths. Light intensity, carbon dioxide levels, temperature, and wavelength of light can all be varied. How does the color of light affect the rate of photosynthesis? a. On the COLOR tab, slowly drag the. consisted of side to side movements of i| cm. If there is enough water, carbon dioxide, and the temperature is right, light becomes the factor which will affect photosynthesis. on germination rate. Which of the following would have the smallest effect on the rate of photosynthesis in a green plant? a) carbon dioxide concentration b) light intensity. It stops the. Chromotherapy, a. After point x another factor might be affecting the rate of photosynthesis, which is known as a 'limiting factor'. H 2O minimum abs 460 nm. In this experiment, the light intensity is changed by changing the distance of the source of light closer or further away from the elodea, so theoretically, when the intensity becomes stronger due to the light source being closer to the Elodea, the rate of photosynthesis should increase and. When this point is reached, the photosynthesis rate curve becomes flat (Figure 1). Explanation: Plants get their energy from light, but different colors of light have different energy levels. The rate of photosynthesis will not be the same for every wavelength of light. No the color of light does not affect the plant growth because the color of light does nothing it is the light that does all the work. The Effect of Light Intensity on Photosynthesis Of Elodea Canadensis Introduction I wanted to find out how much the light intensity affected the Photosynthesis in Elodea Camadensa. Germination - how monocots and dicots differ - the effects of heat, light, carbon dioxide, PH level, etc. This chemical energy is stored in carbohydrate molecules, such as sugars, which are synthesized from carbon dioxide and water - hence the name photosynthesis, from the Greek phōs (), "light", and sunthesis (σύνθεσις. Although this graph is not perfect, it does show how the rate of photosynthesis varies at different light wavelength. 03 Illustrations All zipped. Photosynthesis Lab. In the experiment, leaves are sunk into five (red, green blue, and violet) different food coloring NaHCO3 solutions. This Type of Algae Absorbs More Light for Photosynthesis Than Other Plants Though evolutionary mergers between cells, some algae have developed the ability to convert a wider spectrum of light. The visible light seen by humans as white light actually exists in a rainbow of colors. a light box or a similar device to ensure that no exterior lighting factors could affect the rate of photosynthesis in any specific plant (outdoor lighting, sunlight entering from window, clouds. Light saturation occurs at much lower intensities in plants that evolved in shade conditions. Form hypothesis: Which color of light do you think will maximize the rate of photosynthesis? 3. Okay, this is the hardest part of the whole project…picking your topic. How does light intensity affect the rate of photosynthesis? [1 K/U] - light affects the rate of photosynthesis, increasing it proportional 7. Figure 1 and 2 clearly show that the red light segment of the plants and the blue light section did not hold up well to the lack of true white light. The trees will rest, and live off the food they stored during the summer. We tested things that affect the rate of photosynthesis such as the importance of carbon dioxide and the source of light emissions. Knowing that different colors of light can affect what a plant does is important in a world that depends on plants for food. -----Very badly, generally speaking. In this experiment, the team aims to manipulate the color of light and control the following variables: CO2, water, and temperature. Question: I need help with an experiment I'm doing. The research aspect of this science fair project is to assess how light intensity affects the rate at which photosynthesis occurs and the rate of oxygen production. This is because it's limited by other factors, such as the level of carbon dioxide in the air. The plants were grown in a controlled-environment room with a 14-h photoperiod, day–night temperatures of 29–24 °C, and 60–70% relative humidity. That's an awesome question. Temperature. The color you observe is a complement to the color the object absorbs. With depth color shifts bluer. The wavelength one is trickier. Light has 3 different characteristics that affect the rate of plant growth. -----Very badly, generally speaking. Predicting If a plant is kept under green-colored light for an extended period of time, what will happen to the plant’s food production? 4. Dependent Variable: Rate of photosynthesis (number of floating disks after 15 minutes). Fill in the first column of Table 2. Chlorophyll in the plant is the pigment that absorbs light. As light is no longer the limiting factor of photosynthesis, it will then photosynthesize at a high rate until another variable becomes a limiting factor. To determine whether or not the color of light affects plant growth. How does temperature affect the rate of photosynthesis? 28. Oxygen is released. How does the color of light affect the rate of photosynthesis?. The energy derived from light absorption is used in particular pathways to achieve the final result of synthesis of sugars. SIMBIOS protocols K water = 0. This rate of photosynthesis goes on increasing till light or some other factor acts as a limiting factor (B) The readings show that the rate of photosynthesis is more in sun. THE EFFECT OF DIFFERENT LIGHT COLORS ON THE PHOTOSYNTHETIC RATE IN PLANTS By: Emily, David, Michael 10/20/2014 Mr. The role of chlorophyll in photosynthesis is vital. Gail Navarro 9,191 views. Chlorophyll is found in the photosystems and is used to capture light energy. Photosynthesis is the phenomena in which solar energy is converted into useful bond energy. Red-orange light (625nm-700nm) shows a good rate of photosynthesis however the best rate of photosynthesis is seen with violet-blue light (400nm-525nm). ★ Light is the energy source for Photosyñthesis. Plants deprived of light will lose their color and die. Observation: Many different factors can affect the rate of photosynthesis such as temperature, light intensity, levels of CO 2, and wavelengths (color) of light. The base graphic is from Wikipedia, with my annotations. fewer sugars will be produced d. Photosynthesis occurs in the plant cells by taking place in the chloroplast. The light intensity range for most plants falls between 1,200 and 2,000 lumens (measurement of light intensity). Question: What color of light is the best for photosynthesis? Observe: The color of a light wave is determined by its. ★ Light is the energy source for Photosyñthesis. Green _____ bpm White _____ bpm. Photosynthesis does depend on light. Amount of Carbon Dioxide: More CO2 increases rate of photosynthesis Will reach its maximum rate, or saturation point. Be sure to keep the light intensity. Before coming to lab: 1) Use your textbook to review chloroplast structure and photosynthesis; 2) Read this handout - there may be a quiz. Photosystem II aborbs infrared and red light (540nm-630nm) and it is for this reason that photosynthesis is highest under red light. Check a photosynthesis action spectrum to see how light color or wavelength affects photosynthesis rate. In this process, glucose and oxygen in the presence of light energy are produced from carbon dioxide and water. Leaves on a "sun plant" tend to be smaller and thicker, with more pronounced lobes than shade plant leaves. There are five matters that affect the rate of photosynthesis: light intensity, temperature, CO2, water, and the color of light in general. 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. chlorophyll c. Light intensity, carbon dioxide levels, temperature, and wavelength of light can all be varied. It absorbs the green light least than any other color and that’s reason photosynthesis rate is slowest in green light. 01 Effect of light on shoots 15. Thus, while blue light can appear somewhat dim to us, it has high energy and is useful for plant growth applications. The traditional light bulb is. 2 May 2020. If there is enough water, carbon dioxide, and the temperature is right, light becomes the factor which will affect photosynthesis. Photosynthesis is a process taking place in plants and can be defined as a conversion of light energy to chemical energy. that photosynthesis involves both light absorption and enzymatic reactions. The Effect of Light Intensity on the Rate of Photosynthesis Plan: Aim: To investigate the affect of light intensity on the rate of photosynthesis. According to your data, does light intensity affect the rate of photosynthesis? Explain. b) Increasing CO2 levels will [ increase / decrease ] rate of photosynthesis. chlorophyll c. 1m from the light. affect the rate of photosynthesis? Experiment on your own by altering the variables in order to determine. fewer sugars will be produced d. Germination - how monocots and dicots differ - the effects of heat, light, carbon dioxide, PH level, etc. Plants deprived of light will lose their color and die. Now change the color of the lights. As light intensity (PPFD) increases, so does the rate of photosynthesis, until a saturation point is reached. So the colour of light affect the rate of photosynthesis. Photosystem II aborbs infrared and red light (540nm-630nm) and it is for this reason that photosynthesis is highest under red light. What effect does light quality have on the rate of photosynthesis?. We hypothesized that if green leaves have a significantly higher rate of photosynthesis (consumption of CO2) than yellow leaves, because green leaves contain more green chlorophyll a and chlorophyll b photosynthetic pigments than yellow leaves, then the. Some green light is retained by your plants for photosynthesis; leaving this part of the spectrum out altogether can negatively affect the growth of the plants. Lower temperatures mean lower rate of. Why are two leaves of the same tree different in color intensity? 3. Chlorophyll is found in the photosystems and is used to capture light energy. (loses red first, green later) SCUBA diver? Color of blood. Generally speaking, photosynthesis of a plant will increase with an increase in temperature. Light rays with different colours have different amounts of energy, or the colours of light rays represent the amount of energy they have. Will different light sources generate a change in the size, color and rate of the growth responses? Control and Variables: Control-Plant type, temperature, amount of light, and planting medium should all be the same. , break down) when there is optimum daytime temperature. How does light intensity affect the rate of photosynthesis? [1 K/U] - light affects the rate of photosynthesis, increasing it proportional 7. Maybe a blockout of sunlight or not enough access to water and. The maximum rate of dye reduction is 0. The wavelength of light determines its color. Plants need light energy to make the chemical energy needed to create carbohydrates. Light also speeds up transpiration by warming the leaf. Essentially, light energy is a crucial factor in photosynthesis hence the need to test for the difference in the light spectrum. I predict that the more intense the light, the higher the rate of photosynthesis. For the sake of clarity all of the enzymes, except Rubisco, have been omitted and only the carbon skeletons of the intermediates are shown. Photosynthesis is driven by the energy in light. They allow plants to gather light energy. In many cases, UV light is a very important contributor for plant colors, tastes and aromas. To do this job, the. How does the color of light affect the rate of photosynthesis See answers (1) Ask for details ; Follow Report Log in to add a comment to add a comment. Light is an extremely important factor for the process. To experimentally determine the effect of light intensity on the rate of the light-dependent reactions of photosynthesis. The light “quality” is the one that. What were your bubbles per minute for: Orange _____ bpm Blue _____ bpm. 2% NaHCO3, room temperature, and under white light using light intensities of 2200, 4250, 5300, 14400, 20600 lux. Red-orange light (625nm-700nm) shows a good rate of photosynthesis however the best rate of photosynthesis is seen with violet-blue light (400nm-525nm). As light is no longer the limiting factor of photosynthesis, it will then photosynthesize at a high rate until another variable becomes a limiting factor. Photosynthesis is one of the most remarkable biochemical processes found on Earth and allows plants to use sunlight to make food from water and carbon dioxide. Light Color Prediction for Relative Photosynthetic Rate by color WHITE BLUE RED GREEN Light Color (mm of O2) TIME (min) WHITE BLUE RED GREEN 0 0 0 0 0 3 6 9 12 15 Graph the “Amount of Oxygen Liberated” (Rate of Photosynthesis) versus “Time” for all four light colors on one graph. We tested things that affect the rate of photosynthesis such as the importance of carbon dioxide and the source of light emissions. Therefore, different light colors have an effect on photosynthesis and respiration rates. A plant, like the human eye, makes use of the visible light spectrum to fuel photosynthesis and other life processes. IntroductionThis lab has been created in order to find what extent does distance from a light source (5cm, 10cm, and 15cm) affect the rate of photosynthesis (measured in bubbles / 3 min) in Elodea water plants. It is a process by which green plants produce carbohydrates from carbon dioxide and water by the help of chlorophyll (green pigment in plants) in the presence of light energy. The lack of sunlight stunted photosynthesis and therefore the sprouts were not able to produce the chlorophyll needed to create a green color. The Color Of Light Affects Plant Growth 1355 Words | 6 Pages. Which color was the most detrimental to plant growth? What is the wavelength of the light for this color (see fig. Cellular respiration takes place during the daytime and during the night time. behaving differently in the two tubes. The point where an increase in light intensity will not increase photosynthesis any more is called light saturation. With depth color shifts bluer. At a high light intensities photosynthesis reaches a plateau and so does not increase any more. The rate at which their absorbances went down increased as their distance from the light source decreased. By: Nicole Rossi and Emily Wang. The energy intensity provided by red light stimulates overall growth throughout the plant body, while blue light helps to regulate growth rates within the leaves, stems and flowers. Additionally, low temperatures cause plants to grow poorly. Photosynthesis is a process that uses the energy in light rays to converse raw material (water and CO2) into chemical energy. Therefore, different light colors have an effect on photosynthesis and respiration rates. Observe: The color of a light wave is determined by its wavelength. Oxygen production is used to measure the rate of photosynthesis. The color or wavelength of light does affect photosynthesis, which is how plants can basically create their own food. Light is made up of three different colors: red, blue and green. Red light is special in that it can deliver high growth to a plant, but without the limiting effect of blue that obscures the chloroplast to protect it from high-blue midday sun. Site 2: Photolab → biol. Some of the light misses the leaf chloroplast, where the photsynthetic reactions occur, and much of the energy from light that is converted by photosynthesis to carbon compounds is used up in keeping the plant biochemical "machinery. The light intensity range for most plants falls between 1,200 and 2,000 lumens (measurement of light intensity). According to Molina. Manipulated: The variable that you change. tannins 14. More light will result in an increased rate of photosynthesis. using immobilised algae), via the production of oxygen in pondweed, via the increase in dry mass, and via the production of carbohydrates. The influences of light intensities and light spectra on the periodicity of photosynthesis were tested on clade A. chlorophyll c. "The different wavelengths of light to not effect photosynthesis equally: red and blue light are the most effective at promoting photosynthesis. • To investigate the rate of oxygen production during photosynthesis • To measure the effect of wavelength of light on photosynthetic rate • To investigate starch production and storage in a single leaf. Our perception of blue light, especially at shorter wavelengths (for example, 400 to 425 nm) is low compared to green. Gail Navarro 9,191 views. However, it is often thought that the colour of light does influence the rate of photosynthesis. Photosynthesis is a process that uses the energy in light rays to converse raw material (water and CO2) into chemical energy. The wavelength of light determines its color. Light has 3 different characteristics that affect the rate of plant growth. This point where the light intensity does not increase the photosynthesis rate is called the light saturation point. This rate of photosynthesis goes on increasing till light or some other factor acts as a limiting factor (B) The readings show that the rate of photosynthesis is more in sun. The visible light seen by humans as the color white light actually exists in a rainbow of colors in the electromagnetic spectrum, with violet and blue having shorter wavelengths and, thus, higher energy. Which pigment gives com and lemons yellow color a. Carbon dioxide is used during photosynthesis. Place the boxes in a designated area that gets plenty of sunlight during the day. Light also cause photorespiration. My hypothesis is correct. How Does Light Affect Plant Growth? Most of us take light for granted, perhaps due to the fact that it is readily available and we only need it so that we can see clearly. Photosynthesis is a process taking place in plants and can be defined as a conversion of light energy to chemical energy. The vast majority of living. What does the color change indicate in terms of the Elodea plant? It took from 45 minutes to an hour for the phenol red to change from yellow back to a reddish color. 2) photosynthesis requires carbon dioxide to furnish the carbon required to make glucose. The Effect of Different Wavelengths of Light on the Rate of Photosynthesis Investigate the effect of light intensity on rate of photosynthesis Does The Color Of Light Affect Plant Growth?. Gather evidence of inputs and outputs of photosynthesis Grade level: Grade 7, 8. However, more than 95% of it is made by steam reformation of fossil fuels, a process that is energy intensive and produces carbon dioxide. affect the rate of photosynthesis? Experiment on your own by altering the variables in order to determine. Studies show that 385 nm UV light. More light will result in an increased rate of photosynthesis. Does The Color Of Light Affect Plant Growth? - Duration: 10:59. chlorophyll. What are three factors that affect the rate at which photosynthesis occurs? a. As photosynthetic rates increase, more oxygen will be released. 2% NaHCO3, room temperature, and under white light using light intensities of 2200, 4250, 5300, 14400, 20600 lux. Rose Nazarian & Shawn Murie CU Boulder During this lab we wanted to determine if the color of the leaves affects the rate of photosynthesis. Light wavelength. What happens to pigment as leaves change color with seasons? 2. It stops the. In the equation above we can see that plants need not only a light source of sufficient intensity and the correct wavelengths for photosynthesis, but also a supply of carbon dioxide and water. My hypothesis is correct. In so doing, photosynthesis provides the basic energy source for virtually all organisms. The rate at which their absorbances went down increased as their distance from the light source decreased. How a Plant Uses Glucose. " The yellow pigment reflects yellow light, obviously! That's why we see yellow!. On the COLOR tab, slowly drag the. BROOKER KLUGH Queen's University, Kingston, Canada (With 2 figures in the text) VERY extensive literature exists concerning the relation between \ light and photosynthesis, and this fundamental biological pro-. What colors are absorbed the worst? the plant is reflecting the. And the temperature can affect the rate of photosynthesis because if it's too cold or too hot the plant that is apart of photosynthesis will die out. Blue light has an impact on chlorophyll production, but you only need it very small quantities when compared to red light. variables (such as light intensity, water pH, and CO. Photosynthesis Lab. Light also cause photorespiration. To what extent does the colour of light have on the rate of photosynthesis on Cabomba Aquatica plants? Background knowledge: Photosynthesis is a process that occurs in all plants including bacteria and algae. 2005), and probably. On the COLOR tab, slowly drag the. - Investigating Human Power. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Carbon dioxide is used during photosynthesis. The colored curves on the graph above show the intensity of light (solar radiation) at different depths in the ocean plotted against wavelength of light at each depth. Fill a 250 ml Erlenmeyer flask to the 100 ml line with tap water, then add 5 ml of phenol. Irradiation with short-green wavelength at higher PPF increased the growth of lettuce plants. Mitochondria produce sugars more effectively in the darkness than chloroplasts do. So the colour of light affect the rate of photosynthesis. Plant growth is affected by the color of different lights. Essentially, light energy is a crucial factor in photosynthesis hence the need to test for the difference in the light spectrum. Does the same occur in aerobic respiration? What is the effect of these variations on glucose balance? In a photosynthetic organism, the rate of aerobic respiration can be superior, inferior or equal to the rate of photosynthesis. "The different wavelengths of light to not effect photosynthesis equally: red and blue light are the most effective at promoting photosynthesis. It also said that artificial blue light was a cool color. The green pigment, chlorophyll, restricts the efficiency of photosynthesis. Light independent reactions need more heat energy than nighttime temperatures often provide. we will try to isolate one variable, in this case the wavelengths of light, and see what effect these have on the amounts of photosynthesis in leaves. Leaves, flowers, coral, and animal skins contain pigments that give them color. This point where the light intensity does not increase the photosynthesis rate is called the light saturation point. Results may vary. - Height of Holly Leaves Affect Prickliness. The only way to find the limiting factor is to repeat the experiment with more carbon dioxide and see whether the rate is higher above 12 units. Under which color will the release of oxygen gas be slowest? a) blue - fastest b) green c) orange - fast d) red - faster. There’s research that suggests soft-bodied pests cannot survive long periods of cold, which is why you rarely see mealybugs in the winter months. Each color of lights allows plants to grow better in some aspect. Temperature. Photosynthesis process requires several factors such as: Light Intensity: Increased light intensity results in a higher rate of photosynthesis. So the colour of light affect the rate of photosynthesis. How does the temperature effect the rate of photosynthesis? Yong Clement 10 rho Problem QuestionHow does the temperature affect the rate of photosynthesis?HypothesisWhen the tempreture is too low, enzymes do not react with molecules as frequent, and when the tempreture is too high, the enzyme denatures and cannot function properly. Photosynthesis is a process that uses the energy in light rays to converse raw material (water and CO2) into chemical energy. White light appears to be the most effective light for. (C) The readings show that the rate of photosynthesis is the highest in red light and lowest in green. Light is made up of three different colors: red, blue and green. Chlorophyll, the green pigment common to all photosynthetic cells, absorbs all wavelengths of visible light except green, which it reflects to be detected by our eyes. The energy derived from light absorption is used in particular pathways to achieve the final result of synthesis of sugars. Respiration rates differ by the amount of activity and/or development the organism is going through. Why Do Plants Need Light? You might recall your old science classes in grade school discussing photosynthesis when answering the question, "How does sunlight affect plant growth?" Perhaps it looked something like this: 6H2O + 6CO2 —-> C6H12O6 + 6O2. Every plant species has a different light saturation point where photosynthetic levels plateau based on the light environment they evolved in. The plants grown at 238 μmol m −2 s −1 showed a significantly higher rate of photosynthesis (Figure 2A) than plants grown at 80 μmol m −2 s −1 under blue LEDs. Look at the packaging of a few different. Like other green plants, pond weed can make sugar from carbon dioxide and water. Be sure to keep the light intensity. The rate of photosynthesis should correlate with the intensity of the light provided. On the COLOR tab, slowly drag the Light wavelength slider back and forth and observe the effect on oxygen production. the plants that are already in place will grow faster in order to emerge above the other plants to acquire sufficient light for their photosynthesis. Aim: The purpose of this experiment is to find out under what wavelength (different colour of light) the elodea plants are able to grow and photosynthesise the best. Part 2: Photosynthesis and Cellular Respiration Students explore the factors that may affect rates of photosynthesis and cellular respiration. The intensity of light is important for maximizing the rate of photosynthesis. Maybe a blockout of sunlight or not enough access to water and. Effect on plants: Yellow light does not have much effect on photosynthesis. Rate of photosynthesis was determined at pH 7, 0. can determine the rate of this reaction by measuring the amount of product made, in this case O2. Electron carriers Pigments Factors Affecting Photosynthesis 1) Light Intensity in light = ____ in the rate of photosynthesis ***Warning:_____ 2)Temperature – best between 0 C and 35 C If the temperature is too higher or too low, this changes the shape of the enzymes involved in photosynthesis. There are two main “windows” in the Atmospheric “greenhouse effect”. The hypothesis was that the lights higher on the light spectrum, like blue, would have the fastest rate of photosynthesis because the energy is the highest; the green light would have the slowest rate because the chlorophyll inside of the leaves reflects green light, so it will not be absorbed as much as the other colors. The research is tiered by temperature ranges and reproduction rates1. -----Very badly, generally speaking. 1 Received for publication May27, 1976 and in revised form August 16, 1976 photosynthesis and a "blue-absorbing" pigment system, operate in stomatal opening three colors of light. The Effect Of Red Light Treatment On The Rate Of Photosynthesis. 15 The effect of light on shoots Pea seedlings are grown for a week in light or darkness and their shoots compared. Light independent reactions need more heat energy than nighttime temperatures often provide. It’s important to have the right type of light from the spectrum of colors available to ensure the natural pattern of growth is copied as closely as possible. The concentration of CO2: Higher concentration of carbon dioxide helps in increasing the rate of photosynthesis. See, sunlight contains many colors of the visible specturm, and the invisible. The key factors affecting the rate of photosynthesis are light intensity and colour, carbon dioxide concentration and temperature. It’s pretty close to the range of light that humans can see, but not quite. Light intensity has a very large effect on the rate of photosynthesis. the light color has a major effect on the rate of photosynthesis -- oxygen production is high for orange and blue light and low with purple, green, and red light what colors were absorbed best by the plants. Phycobiliproteins use this property to change the color of light they absorb so that the light can be used for photosynthesis. 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. The timer in the square box can be used to measure 30 seconds. The main variables which affect photosynthesis are light, water, CO 2 concentration and temperature. Like other green plants, pond weed can make sugar from carbon dioxide and water. Rather, the color is in the light that shines upon it and is ultimately reflected or transmitted to our eyes. (a) Light-emitting diode light(s) can sustain normal plant growth. Which pigment gives com and lemons yellow color a. The wavelength one is trickier. If you shone white light at a plant then photosynthesis would occur at a normal rate because the correct wavelengths of light are available. It is a process by which green plants produce carbohydrates from carbon dioxide and water by the help of chlorophyll (green pigment in plants) in the presence of light energy. BROOKER KLUGH Queen's University, Kingston, Canada (With 2 figures in the text) VERY extensive literature exists concerning the relation between \ light and photosynthesis, and this fundamental biological pro-. The growth rate of algae is based on photosynthesis and the light that is available to the organism. Visible light has a wavelength that ranges from 400-700 nanometres.