TITLE: The Effect of Gibberellic Acid on Germination

AUTHOR: Jennifer Richardson

SCHOOL: Hanover High School

SCHOOL ADDRESS: 287 Cedar Street

This experiment was done to determine the effect of Gibberellic acid on the germination of dwarf pea plants and marigolds. Various concentrations used were 10 ppm, 20 ppm, 40 ppm, 80 ppm, and 100 ppm. The method used was treating the seeds with the different concentrations of Gibberellic acid. In total 12 petri dishes were prepared each containing 20 seeds. The results were recorded for 8 days, until it appeared as though no new seeds would germinate. Results for the dwarf pea plants showed that the 20 ppm solution was most effective followed by the 40 ppm solution. For the marigolds the 100 ppm solution proved to be the most effective on germination. All of the 20 seeds prepared to begin, germinated by the fifth day of experimentation, followed by the 10 ppm solution. The experiment showed that Gibberellic acid had only a slight effect on the marigolds. When Gibberellic acid solutions were used on dwarf pea plants there was more of an effect when 20 ppm, 40 ppm, and 80 ppm were used. Thus concluding that due to the type of plant used there was not a major, consistent effect on the germination of these seeds.