seed germination: emergence of radicle through seed coat waterwarm temperature so if you want to...
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Seed Germination:
Emergence of Radicle through Seed Coat
Water Warm TemperatureSo if you want to store seeds what are the conditions?
Dry Cold
Dormant seeds need more than moisture and warmth:
Thick Seed Coat
Thin Seed Coat
Insufficient Development
Inhibitor: Abscisic Acid
Inhibitor: Phenolics
Scarification
Light
Soil Fungus Association
Stratification > Vernalization
Leaching by Repeated Rain
Kentucky Coffee Tree
Lettuce
Orchids
Most CT feral plants
Cacti
Darkor or Pea
Dormancy is caused by: Is overcome by: Example:
Seeds lacking dormancy need:
nick digestscrub firefreeze-thaw cycles
6 weeks at 4° C
20° C
Barley Seed Germination
Fruit+Seed Coat
Endosperm
Aleurone LayerStorage Protein
Amino Acids
hydrolys
is
translat
ion
transcri
ption
hydrolys
is
starch
sugar
-amylase
RNA
DNA GA
imbibition
water
radicle apex
shoot apex
growth
cotyledon monocot
maltose
Embryo
exocytosis
Capsella Seed:
Seed Coat
Endosperm
Embryo
Shoot Apex
Cotyledons - dicotHypocotyl
Radicle
Root Apex
Micropyle
Lettuce Seed Germination
660 nm
730 nmdark
Seed Coat
translat
ion
transcri
ption
hydrolys
is
starch
sugar
-amylase
RNA
DNA
imbibition
water
radicle apex
shoot apex
growth
dicot
photoreversibility Pfr Pr
photoactivation
Embryo
phytochromered and white light stimulate germination
cotyledons
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