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Under Which Color Light Do Plants Grow the Tallest?

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Faith Marie Losbanes

on 17 April 2014

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Transcript of Under Which Color Light Do Plants Grow the Tallest?

Under Which Color Light Do Plants Grow the Tallest?
Determine which color light will have the fastest rate of plant growth.
The two main processes that enable growth and food production are photosynthesis and respiration.Plants need water and sunlight. They also require oxygen and carbon-dioxide.
The color spectrum consists of all colors. When a white light is shined through a prism it is separated into all the colors of the spectrum. The colors that we can visibly see are red, orange, yellow, green, blue, indigo and violet.
According to the electromagnetic spectrum, the wavelengths of the color red move very slow then progresses faster as you move closer to the color violet. Violet has the fastest wavelength that is visible to us. The faster the wavelength, the greater the energy in that color.
Put soil in pots ¾ of the way up
Plant four beans in each pot
Water beans until there are at least one bean plant in each pot grown four inches
Make 5 small greenhouses big enough to cover one plant and cover each in a different color of cellophane
Place greenhouses over each pot
Water everyday
Track height of each plant daily for 2 weeks
Potting soil
5 pots or cups
Bean seeds
bamboo skewers
wood glue
Red, yellow, green, blue and transparent cellophane

Faith Marie Layag Losbañes
From the data you can find that the bean plant under the blue light grew the tallest. The Control group and plant under the red light grew the shortest. The plant under green light grew second best and the plant under yellow light grew second to last in the time span.

In the 2 weeks this experiment ran, the plant under red light grew a total of 4.1 cm. The plant under yellow light grew 4.3 cm. Under the green light the plant grew 5.15 cm. Under a blue light the plant grew 7.1 cm and the control plant grew 4.1 cm.

The red and yellow ones grew very healthy looking with plenty of leaves except they were also short. The blue and green ones grew fast and tall but weak. The lower than expected results of the control plant could be explained by the genes inherited by the plant or, even though the plants were kept as close together as needed and rotated, by the position/exposure to sunlight it got.
Blue light regulates growth. Red light increases flowering and budding so the plant has an abundance of foliage
My Hypothesis was partially correct because the bean plant with the blue colored filter did grow the tallest but, my control plant did not grow as tall as I hypothesized.

I predict that the bean plant
under blue light will grow
the tallest.

My thesis in this experiment is that the plant without any colored filter grows the tallest because it is getting all the colors leading to lots of energy being absorbed. If one were to pick among the colors, the blue lighting is the most important and therefore will help the plant grow the best. It gives the most energy to the plant and is the most necessary for plant growth by regulating all of the functions relating to the growth of a plant.

All the colors we don't see are absorbed and the plant reflects off the green light.
The color of light that contributes the most energy to the plant is near the violet end of the electromagnetic spectrum.

(The End)
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