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Seed Germination:

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Emergence of Radicle through Seed Coat. Water. Warm Temperature ... Thick Seed Coat. Thin Seed Coat. Insufficient Development. Inhibitor: Abscisic Acid ... – PowerPoint PPT presentation

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Title: Seed Germination:


1
Seed Germination
Emergence of Radicle through Seed Coat
Water
Warm Temperature
So if you want to store seeds what are the
conditions?
Dry Cold
Dormant seeds need more than moisture and warmth
nick digest scrub fire freeze-thaw cycles
Thick Seed Coat
Scarification
Kentucky Coffee Tree
Thin Seed Coat
Light
Lettuce
Dark
Pea
Insufficient Development
Soil Fungus Association
Orchids
Inhibitor Abscisic Acid
Stratification gt Vernalization
Most CT feral plants
20 C
6 weeks at 4 C
Inhibitor Phenolics
Leaching by Repeated Rain
Cacti
2
Barley Seed Germination
maltose
exocytosis
?-amylase
monocot
Embryo
3
Capsella Seed
Embryo
Seed Coat
Shoot Apex
Endosperm
Cotyledons - dicot
Hypocotyl
Radicle
Root Apex
Micropyle
4
Lettuce Seed Germination
?-amylase
dicot
Embryo
phytochrome
photoreversibility
red and white light stimulate germination
660 nm
730 nm
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