Determination of effect of different type of sun light on the germination Exp. No. 2 write a lab report

Determination of effect of different type of sun light on the germination
Exp. No. 2 write a lab report

Bio Lab 113
1/23/14
I.
Purpose
The purpose of this experiment is to see what affect light has on the germination of pinto beans.
Introduction: Farming corps is the most important process for the survival of human race. The plants not only provide food for our bodies but it also helps provide the oxygen we breathe. They clean the air in a process called photosynthesis. This experiment tests if pinto bean seeds germinate better if they get more direct morning sun light, afternoon light, nonstop light or no light. Seeds are dormant before germination begins. Dormancy ends when the seed environment reaches a temperature of 77 to 85 degrees Fahrenheit and exposed to water and oxygen.
III. Hypothesis: The amount of sun light does effect the germination.
IV. Materials
 100 beans
 10 5 x 8in bags
 Permanent marker
 Ruler
 Paper towel
 Water
 Masking tape
V. Procedure
1. Think of four spots that you could place the seed in. One needs to have at least 4-
5 hours of morning sun, the next 4-5 hours of afternoon sun, one needs to have light all the time and the last need to have no expose to light. Chart what environment the seeds where placed.
II.

3. To germinate the beans, place one folded paper towel, moistened but not soaking wet, into the 5 x 8in bag. Place 10 beans in a horizontal line on the paper towel (betw een the paper towel and bag).
4. Label each bag with the variable being tested.
5. be sure to keep the environment temperature above 70 degrees Fahrenheit\
6. Leave the bags alone for seven days.
7. After a week get the seeds and measure each seed root and record the length, record the length on the chart.
VI. Data and Calculation
4-5 hours of morning sun
(length of plant’s root in cm) presoaked
No sprout
No sprout
4-5 hours of morning sun
Not soaked
No sprout
No sprout
No light (length of plant’s root in cm) presoaked
No sprout
No sprout
No sprout
No light
Not soaked
No sprout
No sprout
No sprout
No sprout
No sprout
No sprout
No sprout
3 cm
1 cm
3.5cm
2cm
0.5cm
4-5 hours of afternoon sun
(length of plant’s root in cm) presoaked no sprout
No sprout
0.5cm
2cm
0.5cm
4cm
1.5 cm
0.5cm
No sprout
16 cm
12.5cm
14 cm
7cm
6.5cm
9cm
5cm
No sprout
No sprout
No sprout
No sprout
3.5 cm
5cm
Nonstop light (length of plant’s root in cm) presoaked No sprout
4-5 hours of afternoon sun
Not soaked
No sprout
Nonstop light not soaked
5cm

no sprout
No sprout no sprout no sprout no sprout
0.6cm
1.1 cm
4 cm
0.4cm
no sprout no sprout no sprout no sprout no sprout no sprout
0.3cm
0.4cm
0.4cm
No sprout
No sprout
No sprout
No sprout
No sprout
No sprout
No sprout
No sprout
No sprout
7cm
8cm
7cm
10cm
2cm
7cm
5cm
6cm
2cm
VII. Results:
Length of Pinto Bean Seeds root
This experiment tested what effect light has on pinto bean seed germination. A total of 100 pinto bean seeds were used, 20 of which were put in temperatures below 70 degrees, and the seeds did not spout. Then the rest were divided into four group, in each group half there presoaked
0
2
4
6
8
10
12
14
16
18 seed 1 seed2 seed 3
4-5 hrs of morning sun presoaked no light not soaked
4-5 hrs of afternoon sun not soaked seed 4 seed 5 seed 6
4-5 hrs of morning sun not soaked nonstop light not soaked
4-5 hrs of afternoon sun presoaked seed 7 seed 8 seed 9 no light presoaked nonstop light presoaked seed 10
Chart Title

overnight. 20 were put in the window that was expose to 4-5 hours of morning sun, 20 put in a window that was exposed to 4-5 hors of afternoon sun, 20 were placed under a grow lamp that was left on nonstop and 20 were placed completely in the dark. The seeds that done the best were the not soaked seeds placed in an environment that did not change the entire time. The seed in the dark did not grow as long as the ones placed in light however they thicker, stronger and longer but were paler then the ones in light. Therefore, this experiment showed that light did have an effect on seed germination, by changing the health of the plant.
VII. Conclusion: The purpose of this experiment is to see what affect light has on the germination of pinto beans. The data shows that light did have an effect on the germination. The plants need light and a constant environment in order to germinate more successfully. The seeds that were placed in the window began to grow slower and shorter, some not even sprouting. This could be due to the drops in temperatures at night. The seeds placed in the closet did germinate, was longer than the seeds in the window, suggesting that the steady environment and temperature may have more of an affect than the amount of light.