Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.
Photosynthesis By: Matt Goebel, Julia Douglas, Brandon Schroeder, and Courtney Rodgers
Photosynthesis <ul><li>Light energy into chemical energy </li></ul><ul><ul><li>Occurs in Chloroplasts (or prokaryotic equi...
Photosynthesis <ul><li>Chlorophyll are the main photosynthetic pigment </li></ul><ul><ul><li>Light is trapped here </li></...
Photosynthesis <ul><li>Light energy used to produce ATP and split water molecule </li></ul><ul><ul><li>Light captured by C...
Photosynthesis <ul><li>Hydrogen combined with carbon dioxide used to form organic compounds (Ex. Sugar) </li></ul><ul><ul>...
Photosynthesis <ul><li>Photosynthesis can be measured by: </li></ul><ul><ul><li>Depletion of substrate </li></ul></ul><ul>...
Photosynthesis <ul><li>Factors affecting photosynthesis: </li></ul><ul><ul><li>Temperature </li></ul></ul><ul><ul><li>Ligh...
Photosynthesis <ul><li>Carbon Dioxide Concentration </li></ul><ul><ul><li>As the CO2 increases, so does the reaction </li>...
Photosynthesis <ul><li>Light Intensity </li></ul><ul><ul><li>At low levels, photosynthesis cant occur at high rate </li></...
Absorption <ul><li>All chlorophyll absorb  red  &  blue </li></ul><ul><li>Measured in Photons </li></ul><ul><ul><li>Pigmen...
Light-dependent reactions <ul><li>Light-dependent reactions MUST have light </li></ul><ul><li>2 parts: </li></ul><ul><ul><...
Photosystem II <ul><li>Electron acceptor: accepts excited electrons from chlorophyll  </li></ul><ul><ul><li>Plastoquinne (...
Photosystem II
Photophoshorylation & Chemiosmosis <ul><li>Photophoshorylation  </li></ul><ul><ul><li>ATP from light energy </li></ul></ul...
Photosystem I <ul><li>Product is NADPH </li></ul><ul><li>Electrons are photoactivated </li></ul><ul><ul><li>Electrons are ...
Photosystem I
Structure of Chloroplasts  <ul><li>Chloroplast envelope: double membrane </li></ul><ul><li>Internal membranes -> Tykaloids...
Action Spectrum <ul><li>Rate of absorption  </li></ul>
Absorption Spectra <ul><li>% of absorbancy </li></ul>
Limiting Factors  <ul><li>Only 1 factor actually limits photosynthesis </li></ul><ul><ul><li>Factor furthest from optimum ...
Upcoming SlideShare
Loading in …5
×

Photosynthesis

1,039 views

Published on

Published in: Education
  • Be the first to comment

  • Be the first to like this

Photosynthesis

  1. 1. Photosynthesis By: Matt Goebel, Julia Douglas, Brandon Schroeder, and Courtney Rodgers
  2. 2. Photosynthesis <ul><li>Light energy into chemical energy </li></ul><ul><ul><li>Occurs in Chloroplasts (or prokaryotic equivalent) </li></ul></ul><ul><li>Light from sun has range of wavelengths </li></ul><ul><li>-Different colors </li></ul>
  3. 3. Photosynthesis <ul><li>Chlorophyll are the main photosynthetic pigment </li></ul><ul><ul><li>Light is trapped here </li></ul></ul><ul><ul><li>Embedded in the Chloroplast’s membrane </li></ul></ul><ul><li>Different colors, different absorption from chlorophyll </li></ul><ul><li>Remaining colors reflected back </li></ul><ul><ul><li>green leaves </li></ul></ul>
  4. 4. Photosynthesis <ul><li>Light energy used to produce ATP and split water molecule </li></ul><ul><ul><li>Light captured by Chlorophyll </li></ul></ul><ul><ul><li>Light energy trapped into Chemical energy (electrons) </li></ul></ul><ul><ul><li>Chemical energy used to form ATP </li></ul></ul><ul><ul><li>Split water molecule used for: </li></ul></ul><ul><ul><ul><li>Organic molecules (Ex. Glucose) </li></ul></ul></ul><ul><ul><ul><li>Oxygen given off </li></ul></ul></ul>
  5. 5. Photosynthesis <ul><li>Hydrogen combined with carbon dioxide used to form organic compounds (Ex. Sugar) </li></ul><ul><ul><li>Bonds formed by energy from ATP </li></ul></ul><ul><ul><li>Different combinations of C, H, O and N </li></ul></ul><ul><ul><li>Plants are able to form all the organic compounds they need </li></ul></ul>
  6. 6. Photosynthesis <ul><li>Photosynthesis can be measured by: </li></ul><ul><ul><li>Depletion of substrate </li></ul></ul><ul><ul><ul><li>Because: rate of photosynthesis changes, the measure of water/carbon dioxide being used changes </li></ul></ul></ul><ul><ul><li>Increase in biomass </li></ul></ul><ul><ul><ul><li>Because: rate of photosynthesis changes, rate of organic molecules created change, biomass change </li></ul></ul></ul>
  7. 7. Photosynthesis <ul><li>Factors affecting photosynthesis: </li></ul><ul><ul><li>Temperature </li></ul></ul><ul><ul><li>Light Intensity </li></ul></ul><ul><ul><li>Carbon Dioxide Concentration </li></ul></ul><ul><li>Temperature affects photosynthesis </li></ul><ul><ul><li>Increases with kinetic energy of reactants </li></ul></ul><ul><ul><li>Maximum at “optimal” temperature </li></ul></ul><ul><ul><li>Decreases as enzymes begin to denature </li></ul></ul>
  8. 8. Photosynthesis <ul><li>Carbon Dioxide Concentration </li></ul><ul><ul><li>As the CO2 increases, so does the reaction </li></ul></ul><ul><ul><li>Maximum rate of photosynthesis is reached </li></ul></ul><ul><ul><li>Saturation point with CO2 is met and no longer affects plant’s rate of photosynthesis </li></ul></ul>
  9. 9. Photosynthesis <ul><li>Light Intensity </li></ul><ul><ul><li>At low levels, photosynthesis cant occur at high rate </li></ul></ul><ul><ul><li>Increase in light intensity, increase rate of photosynthesis </li></ul></ul><ul><ul><li>Light intensity keeps increasing until rate of photosynthesis can’t increase anymore </li></ul></ul><ul><ul><li>Too high intensity can damage cell </li></ul></ul>
  10. 10. Absorption <ul><li>All chlorophyll absorb red & blue </li></ul><ul><li>Measured in Photons </li></ul><ul><ul><li>Pigment absorbs photon through electrons </li></ul></ul><ul><ul><li>Too much energy/ not enough energy and the energy can't be absorbed </li></ul></ul><ul><ul><li>Electron at high energy level is called an excited proton </li></ul></ul><ul><li>Accessory pigments absorb other wavelengths and then transfers them to chlorophyll </li></ul>
  11. 11. Light-dependent reactions <ul><li>Light-dependent reactions MUST have light </li></ul><ul><li>2 parts: </li></ul><ul><ul><li>Photosystem II </li></ul></ul><ul><ul><li>Photosystem I </li></ul></ul>
  12. 12. Photosystem II <ul><li>Electron acceptor: accepts excited electrons from chlorophyll </li></ul><ul><ul><li>Plastoquinne (hydrophobic) </li></ul></ul><ul><ul><li>Become photoactivated </li></ul></ul><ul><li>Accepts 2 electrons and becomes reduced plastoquinne </li></ul><ul><li>Causes photolysis of water </li></ul><ul><ul><li>Generates Oxygen </li></ul></ul><ul><li>Reduced plastoquinne has energy for photosynthesis </li></ul>
  13. 13. Photosystem II
  14. 14. Photophoshorylation & Chemiosmosis <ul><li>Photophoshorylation </li></ul><ul><ul><li>ATP from light energy </li></ul></ul><ul><ul><li>Main = non-cyclic </li></ul></ul><ul><ul><li>Energy pumps proteins across tykaloid membrane </li></ul></ul><ul><li>Chemiosmosis </li></ul><ul><ul><li>Proteins travel back over gradient </li></ul></ul><ul><ul><li>ATP becomes ADP </li></ul></ul><ul><ul><li>Plastocyanin takes electrons </li></ul></ul>
  15. 15. Photosystem I <ul><li>Product is NADPH </li></ul><ul><li>Electrons are photoactivated </li></ul><ul><ul><li>Electrons are passed along chain of freedoxin (protein) </li></ul></ul><ul><li>Electron from photosystem I replaced by electrons from plastocyanin </li></ul><ul><ul><li>Used to reduce NADPH </li></ul></ul><ul><li>Electrons move back up chain -> ATP </li></ul>
  16. 16. Photosystem I
  17. 17. Structure of Chloroplasts <ul><li>Chloroplast envelope: double membrane </li></ul><ul><li>Internal membranes -> Tykaloids </li></ul><ul><li>Stroma: clear fluid around tykaloids </li></ul><ul><li>Grana: stacks of tykaloids </li></ul>
  18. 18. Action Spectrum <ul><li>Rate of absorption </li></ul>
  19. 19. Absorption Spectra <ul><li>% of absorbancy </li></ul>
  20. 20. Limiting Factors <ul><li>Only 1 factor actually limits photosynthesis </li></ul><ul><ul><li>Factor furthest from optimum </li></ul></ul><ul><li>Factors: </li></ul><ul><ul><li>Light intensity </li></ul></ul><ul><ul><li>Carbon Dioxide concentration </li></ul></ul><ul><ul><li>Temperature </li></ul></ul>

×