The Plant Kingdom Part III

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The Plant Kingdom (Part III)

• Kings of Photosynthesis

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Engage
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Explore

• Begin Photosynthesis Lab
• Photosynthesis Foldable

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Explain

• Autotrophs biotic producers photoautotrophs
  chemoautotrophs obtains organic food without
  eating other organisms
• Heterotrophs biotic consumers
  obtains organic food by eating other organisms or
  their by-products (includes decomposers)

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Video 2
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General Over View of Photosynthesis

• Sunlight
• 1. 6 CO2 6 H2O ------------------gt C6H12O6 6 O2
• Chlorophyll
• 2. Carried out in plants, algae, and some
  bacteria.
• 3. In plants and algae chloroplasts. Bacteria
  cytoplasm.
• 4. The process is broken down into two parts
  a). Light reactions b). Dark reactions
  (Calvin Cycle).

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Light Spectrum
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Light Being Used

• Chlorophyll is the main pigment in the
  chloroplast. It is green and will reflect the
  green light.
• Plants use the violet- blue area of the spectrum
  the most.
• The orange - red area is used also used.

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Chlorophyll Light Absorption
Absorption of Light by Chlorophyll a and
Chlorophyll b
Chlorophyll b
Chlorophyll a
V
B
G
Y
O
R
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The chloroplast

• Sites of photosynthesis
• Pigment chlorophyll
• Plant cell mesophyll
• Gas exchange stomata
• Double membrane
• Thylakoids, grana, stroma

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Photosynthesis An Overview
Chloroplast
Chloroplast
NADP
ADP P
Light- Dependent Reactions
Calvin Cycle
ATP
NADPH
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Video 3
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Light Reactions

• This set of reactions needs sunlight and
  chlorophyll.
• They occur in the area of the chloroplast called
  the thylakoids.
• Sunlight hits and activates an area called the
  photosystem causing water molecules to split into
  H and O2
• The Oxygen leaves the cell, while the H are used
  to help create 2 high energy chemicals ATP and
  NADPH.
• These chemicals are sent to the stroma to be used
  in the Dark Reactions.

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Dark Reactions

• They occur in the stroma of the chloroplast.
• This process does not need sunlight and can
  occur 24 hours a day.
• In this series of reactions the plant makes a
  chemical called PGAL from carbon dioxide and the
  energy from the ATP and NADPH.
• This PGAL is an intermediate compound that is raw
  material for all the materials a plant needs. The
  most common is sugar.

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Calvin Cycle
CO2 Enters the Cycle
Energy Input
ChloropIast
5-Carbon Molecules Regenerated
6-Carbon Sugar Produced
Sugars and other compounds
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Summary

• This is a building process
• It requires water, carbon dioxide, sunlight, and
  chlorophyll. It produces sugar and oxygen..
• The Light reaction produces oxygen and the needed
  materials for the Dark reactions.
• The Dark reactions produce PGAL from the carbon
  dioxide, ATP and NADPH.
• PGAL will be used to produce sugar and other
  materials.

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Elaborate

• Finish Photosynthesis Lab
• Photosynthesis Concept Map
• Compare/Contrast Photosynthesis and
  Cellular Respiration

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CO2
Photosynthesis
includes
uses
takes place in
uses
use
take place in
to produce
to produce
of
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Evaluation