Organic chemicals which are produced by the plant in small amounts act as a plant growth regulator (PGR's). This plant growth regulators do exactly what the name says the regulate the growth of a plant. They also regulate how the plant grows. Plant growth regulators are one chemicals that develop in one area of the plant. This chemical stimulates growth in the other parts of the plant. The thing that is interesting is that the PGR's do not need much of the chemical to work. Different PGR's are used for different species of plants, for example a farmer might want his crops to grow a certain way so he would use a certain PGR to manipulate its growth.
In this experiment we examined the difference between two PGR's and water, to see what there affects
would be on a pea plant. We used two separate plant growth regulators the first one we used was napthalenatic acid (NAA), and the second was Giberellic acid (GA3). The purpose of this experiment was to see how these two plant growth regulators and water affected the length of the stalk of the plant.
In conclusion we find that plant growth regulators are a very important tool because it helps the grower have more control over the way he or she's plants grow and develop. Also we found that GA3 is most affective in stimulating the elongation of the stem. The chemical NAA and water proved to be very in sufficient in this particular experiment.
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