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Seeds and Growing Plants. Parts of a plant. Function of plant parts. Parts of a flower. What are seeds?. Parts of a seed – seed coat. Why do seeds have a seed coat?. Why do seeds have a seed coat?. Why are seeds so different?.

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Presentation Transcript
slide3

Function of

plant parts

parts of a seed seed coat
Parts of a seed – seed coat
  • Why do seeds have a seed coat?

Why do seeds have a seed coat?

why are seeds so different
Why are seeds so different?

Shape Size Colour Texture

slide8

Seed coat texture

  • Cactus seed under a powerful microscope
slide10

Parts of a seed

First leaves

Epicotyle = stem

what do seeds need to germinate
What do seeds need to GERMINATE?

Oxygen - Growth

Sun - Energy for PHOTOSYNTHESIS

Temperature – Cold? Hot? Warm?

Water - Photosynthesis and growth

germination
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

plants need nutrients
Plants need NUTRIENTS

Carbon

Hydrogen

Oxygen

Soil nutrients

slide15

Soil nutrients

Nitrogen – Growth, photosynthesis

Phosphorus – photosynthesis, flowering

Potassium – build proteins, prevent disease

Calcium – Strong cells

Magnesium – Photosynthesis

Sulfur - build proteins and produce food