Plant Physiology (Biology 327) - Dr. Stephen G. Saupe; College of St. Benedict/ St. John's University; Biology Department; Collegeville, MN 56321; (320) 363 - 2782; (320) 363 - 3202, fax; ssaupe@csbsju.edu |
Light and Seed Germination
Introduction
Some seeds require light for
germination. In this exercise we will test to see if your seeds have a light
requirement. We will set this up in the form of a typical experiment.
Question:
Do our seeds have a light requirement for germination?
Hypothesis:
My seeds do not require light.
Predictions:
If my seeds do not require light, then the germination percentage for the seeds
planted in the light and dark should be the same.
Protocol:
Results:
Table 1. Germination of ____________________ seeds after _________ days in a petri dish lined with filter paper and moistened with water. | ||||
Treatment | Total Seeds | Seeds Germinated | Seeds not germinated | % Germination |
Light | ||||
Dark |
Statistical Test:
It is likely that we will need to perform a statistical test to determine if
our germination rates are significantly different. We will use a Chi square 2 x
2 contingency table test. This is available through the
Concepts of Biology web site.
We will discuss it in class.
Null hypothesis (Ho): |
|
x2 = | |
p = |
Conclusion:
What do you conclude about the effect of light on germination?
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Last updated:
01/07/2009 � Copyright by SG
Saupe