1. Colorado AgriScience Plant Science
Unit 4: Reproduction & Genetics
Lesson 3: Seeds, Fruit, & Germination
11/13/2018
Colorado AgriScience

2. Seed Anatomy Seed Coat Germination
Protective layer surrounding embryo & endosperm
Protects the seed from drying out & from physical injury
Plays an important role for determining when conditions are conducive for germination
Germination
The act of growth beginning
11/13/2018
Colorado AgriScience

3. Seed Anatomy Embryo Little plant that will grow into a mature plant
Dormant inside the seed
It has a stem, root, one or two cotyledons
Monocots have one cotyledon
Dicots have two cotyledons
11/13/2018
Colorado AgriScience

4. Seed Anatomy Food Supply
Protein & Starch stored in the seed for the embryo
Monocots
Energy supply is the endosperm
Dicots
Energy supply is stored in the two cotyledons
11/13/2018
Colorado AgriScience

5. 11/13/2018
Colorado AgriScience

6. Fruit After fertilization the ovary wall enlarges & forms the fruit
May be fleshy or dry
Serve to disseminate or scatter seeds from parent plant
11/13/2018
Colorado AgriScience

7. Stratification & Scarification
Process where a seed must go through a period of cold to germinate
Scarification
Breakdown of the seed coat for germination
Pass through the acid stomach of an animal
Soil bacteria and enzymes will breakdown seed coat
11/13/2018
Colorado AgriScience

8. Seed Germination
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Colorado AgriScience

9. Seed Germination – Dicot
11/13/2018
Colorado AgriScience

10. Seed Germination – Dicot
11/13/2018
Colorado AgriScience

11. Seed Germination – Monocot
11/13/2018
Colorado AgriScience

12. Factors Causing Poor Germination
Mechanical Injury to Seed
Disease
Storage Conditions
Age of Seed
Soil Temperature to Cold
Hard Seed Coat
Insufficient Soil Moisture
11/13/2018
Colorado AgriScience

13. Factors Causing Poor Germination
Planting to Deep
Chemical Damage
Crusting of Soil
11/13/2018
Colorado AgriScience

14. Any Questions
11/13/2018
Colorado AgriScience