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Respiration

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brief introduction to cellular respiration in plants

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Presentation Transcript

  1. Slide 1: light 6CO2 + 12H2O ï‚® C6H12O6 + 6O2 + 6H2O C6H12O6 + 6H2O + 6O2 ï‚® 6CO2 + 12H2O + Energy 1
  2. Slide 2: Energy Relationship of Photosynthesis and Respiration 2
  3. Slide 3: Photosynthesis Respiration Produces food Converts food into plant energy ATP produced through ATP produced through photophosphorylation oxidative phosphorylation Occurs in cells with Occurs in all living cells chloroplasts Oxygen released Oxygen utilized Water used Water produced Carbon dioxide used Carbon dioxide produced Occurs in sunlight Occurs in dark and light 3
  4. Slide 4: 4
  5. Slide 5: Glycolysis • Translates loosely to sugar splitting • Start with a molecule of glucose • Products = pyruvate, water, and ATP 5
  6. Slide 6: Tricarboxylic Acid cycle • Start with pyruvic acid • Net outcome is the release of carbon dioxide and electrons • Electrons and protons important for the next steps bound in NADH and FADH2 6
  7. Slide 7: Electron Transport System • Electrons from the TCA cycle move through a series of oxidation and reduction reactions • Electron transport is coupled to pumping protons across the membrane. • Oxygen is the final acceptor of electrons from NADH and FADH2 • From one molecule of glucose ultimately you get oxygen reduced to water and the formation of 36 molecules of ATP 7
  8. Slide 8: http://www.life.uiuc.edu/plantbio/cell/ 8
  9. Slide 9: http://www.life.uiuc.edu/plantbio/cell/ 9
  10. Slide 10: http://www.life.uiuc.edu/plantbio/cell/ 10
  11. Slide 11: http://www.life.uiuc.edu/plantbio/cell/ 11
  12. Slide 12: http://www.life.uiuc.edu/plantbio/cell/ 12
  13. Slide 13: http://www.life.uiuc.edu/plantbio/cell/ 13
  14. Slide 14: http://www.life.uiuc.edu/plantbio/cell/ 14
  15. Slide 15: http://www.life.uiuc.edu/plantbio/cell/ 2e- + 2H+ + ½O2  H2O 15
  16. Slide 16: http://www.life.uiuc.edu/plantbio/cell/ 16
  17. Slide 17: 17 http://www.wellesley.edu/Chemistry/chem227/electrontransport/bigpicture.gif
  18. Slide 18: Respiration • Occurs in all living cells • Takes place in the mitochondria • Chemical opposite of the photosynthetic process • Releases ATP 18
  19. Slide 19: Factors Affecting Respiration • Temperature • Oxygen availability • Soil conditions • Light • Growth rate and metabolic activity of the tissues 19
  20. Slide 20: What’s the big deal with respiration? • Used to make chemical energy more accessible for plant growth and development. – Growth, repair, reproduction – Fight off pathogen attack 20
  21. Slide 21: Fermentation Glucose ï‚® pyruvic acid ï‚® acetaldehyde + CO2 ï‚® ethanol 21
  22. Slide 22: Big picture? • Why do extension personnel recommend that growers keep night time temperatures in the greenhouse 9 ºF lower than daytime temperatures? • If 9 ºF lower is better than I am going to grow my plants at 15 ºF below the daytime temps. I will get better growth. Right? • How can you use the principles covered in class today to make an apple last longer? 22

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