1
Seeds and Seedlings
•
Difference between
monocots and dicots
•
Seed form and function
• Germination
•
Identification Keys
• Reading:
– Botany for
Gardeners, pages
24-31
Monocots vs. Dicots
•
The Angiosperm
phylum
(flowering plants) is
divided into two
classes
: monocots and dicots
•
Many differences between members of the
two classes
• Examples:
– Monocots: grasses, lilies, bananas, orchids,
palms
– Dicots: broad leaf trees and most shrubs,
potatoes, cotton, cacti, tobacco, sunflowers
Fertilization
Zygote
Embryo Development
Mature Embryo
Stored Food
Seed Coat
Germination
The Right Conditions
Plant Growth
Mature Plant
SEED
Embryo = immature plant
What Are Seeds Good For?
•
Travel and life insurance
•
Dispersal over time and
space
– Improved chance of finding
correct micro-climate
– Time germination to coincide
with appropriate season and
growing conditions
– Specific environmental stimuli
may be required to break
dormancy.
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- Spring '09
- ritter
- Plants, Sperm, Seed Coat, Germination • Identification, – Time germination
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