1. Seed Germination: Emergence of Radicle through Seed Coat
Seeds lacking dormancy need:
Water
Warm Temperature
So if you want to store seeds what are the conditions?
Dry Cold
Dormant seeds need more than moisture and warmth:
Dormancy is caused by:
Is overcome by:
Example:
nick digest
scrub fire
freeze-thaw cycles
Thick Seed Coat
Scarification
Kentucky Coffee Tree or
Thin Seed Coat
Light
Dark
Lettuce
Pea
Insufficient Development
Soil Fungus Association
Orchids
Inhibitor: Abscisic Acid
Stratification > Vernalization
Most CT feral plants
6 weeks at 4° C
20° C
Inhibitor: Phenolics
Leaching by Repeated Rain
Cacti

2. Barley Seed Germination
hydrolysis
starch
Fruit+Seed Coat
maltose
Endosperm
sugar
exocytosis
Aleurone Layer
cotyledon
-amylase
translation
Storage Protein
monocot
hydrolysis
shoot apex
RNA
growth
transcription
Embryo
Amino Acids
DNA GA
water
radicle apex
imbibition

3. Capsella Seed:
Embryo
Seed Coat
Shoot Apex
Endosperm
Cotyledons - dicot
Hypocotyl
Radicle
Root Apex
Micropyle

4. Lettuce Seed Germination
shoot apex
hydrolysis
starch
Seed Coat
sugar
cotyledons
-amylase
translation
dicot
growth
RNA
transcription
Embryo
DNA
photoactivation
phytochrome
radicle apex
photoreversibility
red and white light stimulate germination
water
660 nm
Pfr Pr
dark
730 nm
imbibition