1. Cellular Respiration on Seed Germination

2. III. Seed Structure Seed Part Function Testa (seed coat)
Tough, protective outer coat
Cotyledons
Embryonic leaves that function as nutrient storage structures
Micropyle
Scar of the opening where the pollen tube entered the ovule
Embryonic root
Becomes plants root system
Embryonic shoot
Becomes plants first leaves

4. IV. Germination Germination is the development of a new plant
Conditions needed for Germination
1. water to rehydrate dried seed tissues
2. Oxygen aerobic respiration to produce ATP.
3. Ideal temperature and pH for enzyme activity
4. Some seeds need special conditions to germinate
a. fire
b. testa disruption
c. freezing

5. 5. Seeds do not carry out photosynthesis
Seeds use used energy stored in cotyledons for cellular processes
This is in the form of amylose
Seed Germination

6. V. Seed Metabolism during Germination
Water is absorbed & activates cells
Synthesis of gibberelins (plant growth hormones)
Gibberelins cause synthesis of amylase
Amylase hydrolyses stored starch to maltose
Maltose is further broken down into glucose which is used for cellular respiration (in mitochondria)