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Effects of different colors of light on the photosynthesis rate.

Do NOT remove theO2 sensor from the respiration chamber.Part B: Photosynthesis/Respiration (Net) Rate under Colored Light13.

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Color & Light Effects on Photosynthesis | Hunker

The Effects of Different Colored Lights on Algal Oxygen ProductionPhotosynthesis Background Resources











The Effects of Different Light Colors on Photosynthetic Rate

Our experiment tested which color (red, blue, green) would influence the plant to produce the most amount of photosynthesis. There are four main photosynthetic pigments found in the chloroplast of the plant called chlorophyll a, chlorophyll b, xanthophylls, and carotenes. All these pigments absorb light and possibly utilize the light energy in photosynthesis. Light energy is essential for photosynthesis. An initial experiment showed that all the pigments at peak absorbance showed violet/blue light at the highest level, orange/red light as the second highest, and yellow/green having the lowest level of absorption. We hypothesized that photosynthesis was affected by the light absorption rate.

Effect of colour of light on the rate of photosynthesis

coli Promotion of Photosynthesis in ChloroplastThe effects of the intensity of light on the rate of photosynthesis in plants.

Plants utilize the process of photosynthesis to convert solar energy into chemical energy to produce cellular respiration. The process of photosynthesis uses the energy of sunlight, which is then absorbed into different pigment types to help the cyclical functions that eventually create atmospheric oxygen. In this experiment we asked how different colors of light effect the rate of photosynthesis. The experiment attempted to see how blue colored and red colored lights affected the rate of photosynthesis. It was hypothesized that because plants absorb more red light, then we predict plants in red light should have a higher rate of photosynthesis when compared to plants in blue. The hypothesis was tested by taking the leaves of a live plant and placing the leaves in a flask. A carbon dioxide gas probe was then placed in the flask to test if the levels of carbon dioxide changed. The independent variable was the color of light and the dependent variable was the rate of photosynthesis in change in levels of carbon dioxide per minute per gram. The change in carbon dioxide levels were proportional to the rate of photosynthesis. Thus red light and blue light was placed upon the flasks of leaves for a total of thirty minutes. The first and last ten minutes the leaves were set in the light and the second ten- minute increment the leaves were in the dark. The second ten minutes was to see if carbon dioxide levels decreased thus to control the cellular respiration. The results show in comparing the carbon dioxide levels that the p=value is .36 meaning there was no significance in the comparison. Therefore the different wavelengths in light made no extreme difference on the rate of photosynthesis. In comparison to other experiments done by others the results were much the same finding that neither light wavelength affected the rate of photosynthesis. The experiment was done with a limited amount of time and the leaves were most likely dead by the end of the experiment. A better hypothesis would be to see how the wavelengths of different colored lights like yellow and green affect the rate of photosynthesis. The use of more live plants would help obtain better results also.

Photosynthesis is the ability of plants toabsorb the energy of light, and convert it intoenergy for the plant. To do this, plants havepigment molecules which absorb the energy of lightvery well. The pigment responsible for mostlight-harvesting by plants is chlorophyll, a greenpigment. The green color indicates that it isabsorbing all the non-green light-- the blues(~425-450 nm), the reds and yellows (600-700 nm). Red and yellow light is longer wavelength, lowerenergy light, while the blue light is higherenergy. In between the two is green light(~500-550 nm). It seems strange that plantswould harvest the lower energy red light insteadof the higher energy green light, unless youconsider that, like all life, plants first evolvedin the ocean. Sea water quickly absorbs thehigh-energy blue and green light, so that only thelower energy, longer wavelength red light canpenetrate into the ocean. Since early plants andstill most plant-life today, lived in the ocean,optimizing their pigments to absorb the reds andyellows that were present in ocean water was mosteffective. While the ability to capture thehighest energy blue light was retained, theinability to harvest green light appears to be aconsequence of the need to be able to absorb thelower energy of red light.

Affect of Different Colored Lights on Photosynthesis

Effect of Different Colored Lights on Photosynthesis

Green or yellow light will have the slowest rates of photosynthesis because they are reflected by the pigments in the plant.
MATERIALS
PROCEDURE
PROCEDURAL FACTORS
INDEPENDENT VARIABLE
DEPENDENT VARIABLE
CONFOUNDING VARIABLES
CONTROL GROUP
REPLICATION
TABLE
GRAPH
DESCRIPTION & ANALYSIS
SOURCES OF ERROR AND IMPROVEMENTS
In this lab experiment, the team examines how the rate of photosynthesis is affected by different light colors in the leafs.

The plant responded to the different colored light as follows: The rate of photosynthesis was the most successful in white light, and more successful in red and blue lighting, than in green and yellow lighting systems.

Effect or Light color on photosynthesis | Academic …
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  • Light Absorption for Photosynthesis - HyperPhysics …

    Bright light is a basic element of photosynthesis, but variations in the color of light have an effect on plants

  • Khan Academy is a nonprofit with the mission of providing a free, ..

    Posts about Effect or Light color on photosynthesis written by Dr. Lynn

  • Pigments absorb light used in photosynthesis.

    been able to show the rate of photosynthesis against light of a full spectrum of colors.

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Photosynthesis Lab--Color by Delaney Emma on Prezi

Clean and dry the respiration
chamber.
Light Color
Rate of O2
production/
consumption in
the DARK
(ppm/m)
Rate of O2
production/
consumption in
the LIGHT
(ppm/m)
GROSS Rate
(ppm/m)
(|rate in the
light| plus |rate in
the dark|)
Biol 171L – FA15 Effect of Light Color on Photosynthesis 7-7
17.

The Effect of Light Wavelength on Photosynthesis Rates ..

To begin measuring the O2 concentration in the chamber, click the green button in the
Biol 171L – FA15 Effect of Light Color on Photosynthesis 7-6
Logger Pro menu bar.

the order of colors in each trail as ..

You will analyze the entire class dataset, giving you
approximately 10-20 samples per treatment.
Your goal is to determine which color of light is the best driver of photosynthesis.

This tutorial introduces photosynthesis

You will either measure the respiration/ photosynthesis rate of Elodea under two of
five colors of lights (blue, green, orange, red, and white) (Parts A & B); or, you will record the
absorption spectrum for Elodea (Parts C & D), and measure the respiration/ photosynthesis rate
of Elodea under one of five colors of lights (blue, green, orange, red, and white) (Parts A & B).
Each color of light (blue, green, orange, red, and white) represents one treatment.

Photosynthesis Lab | Photosynthesis | Color

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You will also do an absorption spectrum of the photosynthetic pigments extracted
from Elodea and determine if there is a correlation between the rates of photosynthesis
under the different colored bulbs, the wavelengths of light that those filters transmit, and
the optimum wavelengths of light absorbed by the plant.
Biol 171L – FA15 Effect of Light Color on Photosynthesis 7-5
EXPERIMENT PROCEDURE
Overview
You will work in groups, as directed by your TA, and each group will take one part of the
experiment.

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