science - seed growth - corn, peas, bean
DESCRIPTION
Presentation to assist teachers in setting up and following seed germination for corn, peas, and bean seeds.TRANSCRIPT
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SEED GROWTHCorn, Peas, Beans
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SETTING UP THE SEEDS - VERMICULITE
To set up the experiment:• Use clear cups and insert a
brown paper towel (seed roots show up better) into a plastic cup.
• Fill cup with vermiculite making sure the paper towel is pressed up against the clear cup.
• Put seed between the cup and paper towel (be careful to place each seed according to the directions that follow).
• Add water, just enough to keep the paper towel moist. .
• Place in a sunny spot in the classroom.
Purchase Vermiculite at any home improvement store in the garden section. It is a substance that will hold the water but not absorb the water. It contains no nutrients and will not aid the plant in growing past seed germination.
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CORN – PARTS OF THE SEED
Image from: http://analytical.wikia.com/wiki/Endosperm
Photo from EDU 615, Science; taken by Carrie Reynolds
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CORN
Corn
Plant the white side of the corn towards the cup as this is where the seed starts the root. Photo from EDU 615, Science; taken by Carrie Reynolds
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CORN
Photos from EDU 615, Science; taken by Carrie Reynolds
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CORNThe corn seed begins to germinate.
Some seeds will not germinate like this seed. This is a good opportunity begin a discussion of why this seed did not germinate.
Photos from EDU 615, Science; taken by Carrie Reynolds
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CORN
Stem is starting to grow
Roots are starting to grow
Photos from EDU 615, Science; taken by Carrie Reynolds
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CORN
Stem continues to grow
Roots continue to grow
Photos from EDU 615, Science; taken by Carrie Reynolds
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CORN
The stem continues to grow
The roots continue to grow
Photos from EDU 615, Science; taken by Carrie Reynolds
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PEAS – PARTS OF THE SEED
Image from: http://www.seedbiology.de/structure.asp
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PEAS
The pea seeds are wrinkled prior to planting. Make sure to point this out to the students so they can make the observation of the seed absorbing water and becoming smooth.
Photo from EDU 615, Science; taken by Carrie Reynolds
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PEAS
Notice how the pea seed is wrinkled.
Photo from EDU 615, Science; taken by Carrie Reynolds
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PEAS
As the seed begins to germinate it takes up water and the seed loses it’s wrinkles and becomes smooth.
Imhibition of water
Photos from EDU 615, Science; taken by Carrie Reynolds
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PEAS
The root and stem break through the seed coat and begins to grow.
Photos from EDU 615, Science; taken by Carrie Reynolds
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PEASThe root begins to grow down while the stem begins to grow up.
STEM
ROOTS
Photos from EDU 615, Science; taken by Carrie Reynolds
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PEAS
Roots continue to grow
Stem continues to grow
Photos from EDU 615, Science; taken by Carrie Reynolds
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PEAS
The stem begins to develop leaves.
The roots continue to grow.
Photo from EDU 615, Science; taken by Carrie Reynolds
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PEAS
The stem continues to grow leaves.
The roots continue to grow.
Photo from EDU 615, Science; taken by Carrie Reynolds
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Images from: http://herbarium.desu.edu/pfk/page1/page2/page2.html and http://qinglovesbiology.blogspot.com/2011/04/34-plant-fertilisation.html
BEANS
Testa or seed coat - provides protection to the seed prior to germination.
Photo from EDU 615, Science; taken by Carrie Reynolds
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BEAN - PARTS OF THE SEED
Plumule or shoot - develops into the first set of leaves as the plant grows.
Cotyledon – provides the nutrition to the developing plant.
Radicle or embryonic root – Develops into the root of the plant.
Image from: http://homeschoolblogger.com/preparation/727274/
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BEANS
BeansPlant with the hilum facing down.
Photo from EDU 615, Science; taken by Carrie Reynolds
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BEANS
The embryonic root begins it’s downward decent.Photos from EDU 615, Science; taken by Carrie Reynolds
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BEANS
The testa (seed coat) softens as water is absorbed and the stem and roots break through the seed coat.
Photos from EDU 615, Science; taken by Carrie Reynolds
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BEANSThe stem continues to grow
The roots continue to grow
Photos from EDU 615, Science; taken by Carrie Reynolds
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BEANS
The seed coat begins to become dry allowing the stem and plumule to break through the coat and grow.
The roots continue to grow.
Photos from EDU 615, Science; taken by Carrie Reynolds
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BEANS
Notice the cotyledons, they are providing the nutrition the plant needs to begin to grow. Soon they will become depleted, dry up and fall off the plant.
The plumule have developed into the first true leaves of the plant.
Photos from EDU 615, Science; taken by Carrie Reynolds
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BEANS
The cotyledons will soon dry up and fall off the plant.
Photo from EDU 615, Science; taken by Carrie Reynolds
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RESOURCES
http://analytical.wikia.com/wiki/Endosperm http://www.seedbiology.de/structure.asp http://
herbarium.desu.edu/pfk/page1/page2/page2.html http://
qinglovesbiology.blogspot.com/2011/04/34-plant-fertilisation.html
http://homeschoolblogger.com/preparation/727274/
Photographs from Oglethorpe University, EDU 615 – Inquiring into Science, taken by Carrie Reynolds