Transcript So what is germination and fertilization?

So what is
pollination/fertilization/germination
??????
Pollination:
Transfer of pollen from anther to the
stigma
How many methods of pollination do
you know?
Ways in which pollination occurs• Rain
• Wind
• Insects
Manually
Gravity
Fertilization:
• Joining of two gametes (male + female cells)
to form a new organism.
Germination:
When a seed changes from a
dormant to an active condition.
What is required for germination?
Varies depending upon plant
General Requirements
• Adequate moisture
• Favorable Temperatures
• Presence of oxygen
Vernalization
• Some seeds require cold to
open the seed coat.
Scarification
• Some seeds require
abrasion to open the seed
coat.
• Freezing and thawing.
• Pass through digestive tract
of animal.
• Manually
Your task is to make a flower model to
illustrate pollination using the guide
posted on my website.
Terms to know:
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Cotyledon
First seed leaves
Radicle
First root
Endosperm
Initial nutrient source for
seedling
• Seed Coat
• Provides Protection
• Germ
• Embryonic plant
What is the difference between
monocot and dicot plants?
Monocot
• Seed can not be split in two.
• Single cotyledon
• Parallel veins
• Fibrous roots
• Grass type plants
• Flower petals multiples of 3
Dicot
• Seed can be split in halves
• Two cotyledons
• Net like veins in leaf
• Tap root
• Broadleaf type plants
• Petals multiples of 4 or 5
Take 5 monocot and 5 dicot seeds.
“Plant” them in brown paper towel
and watch the parts emerge over the
next several days. Record your
observations. Communicate with your
instructor to identify the parts.
Monocot Germination Parts
Single Cotyledon
Coleoptile
(Seeks out light)
Radicle
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http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/G/Germination.html
http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/W/Welcome.html
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Good videos???? G:\horticulture\videos\VLC_file.htm
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