Chapter 8 Photosynthesis

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Chapter 8 Photosynthesis
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Autotrophic nutrition

• The making of their own food from simple
  inorganic compounds (e.g., water, CO2)
• with external energy supplied (e.g., solar energy)

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Photosynthesis
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Light Reactions

• Where? In chloroplasts of green plants
• Reaction

H
sunlight
water
O2

chlorophyll
This reaction is also called photolysis (????)
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Dark Reactions

• Where? In chloroplasts of green plants
• Reactionthe H from light reactions reduce CO2
  to carbohydrate and water

Carbon dioxide
Carbohydrates
Water
Hydrogen atom
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Adaptations of the leaf
Reduce water lost
Transparent to allow light to pass through
Closely packed, with lot of chloroplasts
To transport water
Loosely packed with air spaces for gaseous
exchange
To transport away food produced
With chloroplast, control the size of stomata
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Mineral requirements of plants

• Magnesium
• from soil as Mg2
• to make chlorophyll molecule
• Nitrogen
• from soil as nitrates
• producing proteins