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The purpose of plants
Convert inorganic to organic
Foundation of food web- autotrophs
Shelter
Energy
Medicine
Soil Stability
Adaptations: allowed plants to move on to
land not present in non-vascular plants
Mycorrhizae fungus- in 80% of plants
Pollen grains
Stomata
Cuticle-waxy
Vascular tissue
Xylem- non-living, water from roots
Phloem- living, food to roots
Rate of PhotosynthesisAvailability of raw materials
Temperature 68-95oF (20-35oC)- below or above enzyme activity decreases
Intensity of sunlight
Rate levels off at a given
intensity
ChlorophyllThe pigment that absorbs the sunlight
Chlorophyll absorbs in the blue,
violet and red
spectrum but reflects green light
You see the wavelength reflected
The Players• CO2, H2O, O2, C6H12O6 sunlight
• NADPH, ATP - energy molecules• NADP+, ADP - potential energy
NADP+ NADPH
Light Dependent ReactionTakes Place in the Thylakoid Membrane
Pigment in photosystem II transfers energy to photosystem I
Energy is used by NADP+ to become NADPH
H+ from oxidation of water convert ADP to ATP
2H2O 4H+ + O2
The Dark ReactionThe Calvin Cycle
Takes place in the stroma, does not require light
Energy for reaction is provided by NADPH and ATP
from light reaction
Forms Glucose
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