Lab No. 5

Seedling Germination

INTRODUCTION:
This experiment will let us observe the effects of germinating seeds in the light and in the dark. Also this experiment will show how important water and sunlight are to helping a plant grow to its fullest potential.

 

      What was our control for this experiment?

What we did for controlling this experiment was measuring the germination and growth of total plants. Using radish seeds planted under two conditions light condition and total dark condition. What we did in groups two for light condition. and other two for dark condition. Based in our hypothesis was plant 4 seeds per cup in a tray that have 36 cups . We planted two weeks ago, after that period we analyzed our experiment by counting and doing some math.

2-   What is the percent germination for light treatment? For dark treatment?

we measured our germination percentage by doing some math the following formula was used:

Percent germination =(total number of seeds germinated    )/(total number of seeds planted)*100

                                   

 x=68/144*100                                   

 x = 48% for light treatment

                                 

 

x=48/144*100
x = 34% for the dark treatment

 

3- Make a graph of a total germination percent per treatment.

 

 Height average between light and dark treatment.

 

 Weight percentage between wet and dry plants.

1-    Compare the difference in appearance in the dark treatment and the light treatment plants. If there is a difference in appearance, explain.

Seeds planted in light treatment were very green and some of them were curly, it might be because they were compiting for sunlight. While seeds planted in dark treatment they were yellow and very week their leaves were dropping down  almost to die.

 

2-If there was growth in the dark treatment plants, explain why that growth may have taken place even though light was not reaching the plants. Most of plants only need soil and water in order to germinate. there has been some research done that says that some plants can grow even without sunlight but it is in a slow rate.

 

3-    Using your calculation of class’s data, draw or make three graphs, showing the differences in respiration(R) net primary productivity (NPP) and gross primary productivity (GPP) between light and dark treatment. Titles your graph label your x and y, and make sure your treatment are clear in each graph.

 

References:

http://www.newton.dep.anl.gov/askasci/bot00/bot00333.htm

http://www.ehow.com/info_8104036_plants-growing-dark-science-projects.html