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Does the color of light affect the growth of an Alaskan pea plant?

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´╗┐Color of Light Effecting the Growth of Alaskan Pea Plants 2012 Rachel Kim Sixth Hour Mrs. Davis Table of Contents Abstract???????????????????????????????????3 Statement of Problem?????????????????????????????...3 Review of Literature?????????????????????????????.3-5 Hypothesis??????????????????????????????????5 Variables and Groups?????????????????????????????5 Materials??????????????????????????????????..6 Procedure??????????????????????????????????.6 Results?????????????????????????????????......7-8 Conclusion?????????????????????????????????...9 Bibliography?????????????????????????????...??9-10 Abstract Pea plants, along with many other plants and vegetables, are taken for granted. Without them, much of the world would be different and it would affect the planet in a negative manner. Therefore, it is necessary for plants to be able to grow. In this paper, there is information on seed germination and light?s effects on plants. These are important part of seeds? growth and they were a part of the experiment that was performed and then analyzed in this paper. The experiment tested the color of light?s effect on an Alaskan pea plants? growth throughout the course of fourteen days. The colors used in the experiment are red and green. Plants absorb red light and it is good for growth while plants reflect green light so it is not the most ideal light for growth. Statement of Problem Does the color of light affect the growth of an Alaskan pea plant? Review of Literature Seeds must protect themselves until they are in the right conditions for them to grow. Until the conditions are right, seeds are dormant and appear dead and it is difficult to tell if they are actually alive (Germination). ...read more.


The amount of time plants are exposed to light, or photoperiod, determines the flowering in plants (VanDerZaden). For a time, it was believed that the period of light caused flowering and triggered other responses in a plant but the length of uninterrupted darkness is what effects the floral development (VanDerZaden). It is important for seeds to be able to be dormant because that they can be saved and planted at a later time. Dormant seeds are only able to be planted because of germination which ?wakes up? or activates the seeds. If seeds could not be germinated, then dormant seeds could not be planted which would mean less crops and flowers which would effect in a negative way. Many animals would die because crops and also flowers are near the bottom of the food chain and are necessary in life for almost all living things, even if an animal is a carnivore. Germination is not the only thing necessary for plants? growth. Plants need water, nutrients, carbon dioxide, warmth and a source of light. Light is a key part of photosynthesis and without it, a plant would not be able to produce food for itself and it would eventually die. Germination and light are necessary in plant growth, and plants are necessary for all living things. Hypothesis As the growth a pea plant is exposed to different colors of light (red and green), the plant?s growth will be better in the red light. ...read more.


13cm 14cm 15.8cm 17.8cm 20.2cm 8.3cm 8 10.6cm 12cm 14cm 15.6cm 17.2cm 18.8cm 8.2cm 10.3 11.5cm 13.4cm 16.5cm 19.1cm 20.6cm 22.5cm 8.8cm Conclusion The hypothesis predicted that if plants were put under colored lights (red and green) that the plants growing under the red light would grow the best. This was proven false in the experiment. The plants under the red light grew a total average of 8.2 centimeters throughout the experiment and the plants under the green light grew a total average 8.8 centimeters and finally the plants under the standard light bulb grew 8.3 centimeters. The estimated plants that would grow the most actually grew the least. Most plants absorb red light, causing red light to be very useful in growing plants so it is surprising that the plants under the red light had grown the least. The plants that grew under the green light grew the most which is surprising because plants generally reflect green light. The plants were placed in an area that was warm and that would not require any light bulbs to be turned on during the day to have the room lit. Each lamp was also no more than three feet apart from each other and the lamps were constantly on throughout the experiment. The results may have been different, had each group of plants been placed farther apart in a darker area where the only light sources were the lamps. ...read more.

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