Describe rate of respiration in germinating seeds
Answers
Answer:
Germination percentage is an estimate of the viability of a population of seeds. The equation to calculate germination percentage is: GP = seeds germinated/total seeds x 100 . The germination rate provides an measure of the time course of seed germination. Germination rate is determined by calculating the GP at different time intervals after planting and then plotting these data.
Methods:
Obtain a petri dish and filter paper.
Select a seed source and record the name in Table 1.
Count out 50 seeds (fewer if large seeds). Soak them in water for an hour.
Spread the seeds on a layer of filter paper in the dish
Moisten the paper with enough water so that the seeds just barely begin to float (about 10 ml).
Put on the lid and place the dish in the dark.
Record the number of seeds that germinate daily. Remove the seeds as they germinate.
Explanation:
The rise in the level of water indicates that CO2 is produced by germinating seeds during respiration. Actually, the germinating seeds respire and produce CO2, which is absorbed by KOH solution. This creates a vacuum in the conical flask. The air present in the bent glass tube moves into the conical flask.