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Rapid Radish Experiment

Rapid Radish Experiment - Rapid Radish Experiment Bio 152 J...

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Rapid Radish Experiment Bio 152 J. Schnurr Abstract
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This version of the Rapid Radish Experiment tested the effects of different colored light on plant growth. By using color filters, the light available to the plants was altered. In nature, plants are fed by sunlight which contains light from all areas on the light spectrum following the mnemonic ROY G BIV (red, orange, yellow, green, blue, indigo, and violet). In this experiment, the spectrum of light was limited by the color filters. The chloroplast in plant cells is the feature in plants responsible for light absorption. The reason for the green color is because the pigment chlorophyll reflects green light and is the most abundant of the five pigments found in chloroplasts. My hypothesis is that the plants in the box with the green filter would be shorter than those in the other boxes because they chloroplasts will not absorb a sufficient amount of light for sugar production. Ten plant seeds were placed in each of five boxes with different colored cellophane covering a small hole which was cut into the top of each box. The plants were then provided with 50 mL of water to begin with and placed under fluorescent lights. 30 mL of water was added and measurements were taken at certain times throughout a period of three weeks. The conclusion of this did not prove my hypothesis however and I attribute this to poor data as a result of bad design. The light filters that were used were either plastic cellophane sheets or gel filters obtained from the drama department. The filters effectively changed the color of the visible light but my results show that this had little effect on the growth of the plants. There are many reasons for this such as actual light penetration and human error. In other words, the cellophane may have been mistaken for pure colors when they were not.
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