Effect of Light Color on Plants

1604 Words Dec 25th, 2011 7 Pages
Living organisms have been classified by humans according to several different characteristics, one of them being the manner in which they obtain nutritive organic molecules (1), in other words, their food. Plants are denominated as autotrophs, organisms that can produce their own food from abiotic sources surrounding them, such as light, carbon dioxide and water (2). Plants use these three factors in photosynthesis to convert light energy into chemical energy, which is then stored until the plant needs it, or used right away (3).
The process of photosynthesis takes place on organelles (substructures inside eukaryotic cells) called chloroplasts, more specifically, on the membrane of the thylakoids inside the chloroplasts,
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They were watered with normal tap water, placed next to the same windowpane for a week and monitored every day.

The cellophane secured with the rubber band created a seal that was too tight, preventing excess water from evaporating which overloaded the plants with water and deprived them of enough oxygen. Towards the end of the week, the plants were left covered by the cellophane, but unsecured by the rubber band so that the water was able to evaporate, to provide the dry mass of the samples, which were on average 0.06g lighter than at the beginning of the week, when they were planted . The mass measured included the seeds, soil and plastic container. Even though an unknown type of fungus started growing in the containers because of the high humidity and warm temperature, some shoots were visible (Table 1).

Cellophane Color Qualitative Data
Red Some oat and mustard shoots, fungus growth
Yellow Fungus growth, no shoots visible
Green Oat and some mustard shoots visible, some fungus growth
Blue Some oat and few mustard shoots, fungus growth
Clear Fungus growth, no shoots visible

These samples were discarded and a new method was devised:

A cardboard egg container was cut into fifteen separate segments (for the five
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