Seeds and Growing Plants

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Seeds and Growing Plants
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Parts of a plant
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Function of plant parts
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Parts of a flower
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What are seeds?
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Parts of a seed seed coat

• Why do seeds have a seed coat?

Why do seeds have a seed coat?
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Why are seeds so different?
Shape Size Colour
Texture
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Seed coat texture

• Cactus seed under a powerful microscope

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Parts of a seed Inside the seed
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Parts of a seed
First leaves
Epicotyle stem
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What do seeds need to GERMINATE?

• Oxygen - Growth
• Sun - Energy for PHOTOSYNTHESIS
• Temperature Cold? Hot? Warm?
• Water - Photosynthesis and growth

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GERMINATION

• What is germination?
• Steps
• Seed coat breaks
• 2. Radicle becomes ROOT
• 3. Hypocotyl and epicotyl become the STEM
• 4. First leaves grow PHOTOSYNTHESIS

First leaves
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PARTS OF A SEED - INSIDE
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Plants need NUTRIENTS
Carbon
Hydrogen
Oxygen
Soil nutrients
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Soil nutrients
Nitrogen Growth, photosynthesis Phosphorus
photosynthesis, flowering Potassium build
proteins, prevent disease Calcium Strong
cells Magnesium Photosynthesis Sulfur -
build proteins and produce food
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Soil quality - pH
pH7