Presentation on theme: "Effects of Germination Time Length on Pea Respiration Problem: What effect does germination time have on pea respiration?"— Presentation transcript:
Effects of Germination Time Length on Pea Respiration Problem: What effect does germination time have on pea respiration?
Background With glucose and oxygen, plants are able to perform cellular respiration, creating CO2; this process extracts free energy from carbon compounds for ATP production. Different factors, like germination period, impact the rate of cellular respiration.
Hypothesis As the length of germination of the pea plants increases, the rate of cellular respiration will increase because more oxygen will be needed as the plant grows.
Procedures 1. Soak different sets of peas for 24, 48, and 72 hour periods. 2. Put 25 peas for each time in their respective test tube. Add glass beads to compensate for difference in volume, maintaining a volume of 10 mL determined through water displacement. 3. Record pressure changes for 900 seconds.
Data Table: Length of Germination Volume of Peas in Test Tube Volume of Glass Beads Rate of Change in Pressure (kPa/sec) 24 hours8 mL2 mL-7.753e-5 48 hours8 mL2 mL hours10 mL0 mL Control10 mL0 mL Room Temperature: 18 degrees Celsius.
Results Pressure 1: 72 hour period Pressure 2: 48 hour period Pressure 3: 24 Hour Period
Results Cont. Pressure 1: 48 hour period Pressure 2: Control (Only Beads)
Discussion Different weather conditions give different amounts of moisture availability Peas have higher cellular respiration rates with more germination time Useful in agriculture to determine optimal germination period, optimise plant growth
Conclusion 72 hours best time for cellular respiration based on 3 tested time periods Expect plateau in increase of cellular respiration rate sometime beyond germination time of 72 hours Other conditions to consider to maximize growth: o Temperature o Air Pressure o Moisture Amount
Experimental Errors Did not run control while testing peas Experienced changes in pressure for the control Did not keep the amount of water that the peas were submerged in constant during respective soaking periods