preview

Germination Lab

Good Essays

Title: The Effects of Freezing on Germination Rate
Introduction:
The purpose of this experiment was to discover which species out of three seeds would have the germination rate be the most negatively affected after being frozen for several days. Seed banks store frozen seeds which implied that freezing seeds doesn’t cause any major damage to the seeds. However, some species of seeds would probably be more resistant to being frozen than others. Seeds are native to and are grown in many different types of environments some of which are much warmer and colder than others so there seemed to be a possibility that plants from colder environments would produce seeds less susceptible to damage from low temperatures.
Experimental Question: How does …show more content…

The average number of bean seeds that sprouted in the control groups was 1.5 and the average number that sprouted in the freezer groups was 3. Overall, the beans had the lowest germination rate out of all three species. In all of the groups of squash seeds except for the freezer group in trial 1, 6 seeds sprouted. The freezer group in trial 1 had 7 seeds that sprouted. The average number of seeds that germinated in the squash control groups was 6 and in the freezer groups the average was 6.5. Overall, the squash seeds had the highest germination rate. The pea seeds had the most variation in the number of seeds that germinated. In trial 1, 3 seeds germinated in the control group and 4 seeds germinated in the freezer group, 133.3% more than the control. In trial 2, the control group had five seeds that germinated, 3 more than the two that germinated in the freezer group which had only 40% as many seeds as the control. On average, 4 seeds sprouted in the control groups and 3 seeds sprouted in the freezer …show more content…

There were also procedural problems including imprecise measurement of the water at the beginning of the setup, inconsistent seed placement on the paper towels and irregular times at which the seeds were observed and watered. Also, the seeds were placed very close together which resulted in roots growing over into other paper towels and the faster spread of mold. This mold, which began growing on some of the seeds within a few days, was a major factor. Because the mold began to spread to other seeds and because none of the seeds sprouted after mold had grown, the moldy seeds probably should have been removed. There were also a couple breaks in the pattern of observing and watering the seeds

Get Access