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How Many Plants Would it Take to Keep You Alive?

How Many Plants Would it Take to Keep You Alive?. CO 2 Diffusion in a Leaf. Photosynthetic Electron Transport The “Light” Reactions. ATP. 6NADPH. ADP. H +. Stroma. 6NADP +. 12H +. Cyt b 6 f. 12e -. PSII. ATPase. 12e -. PSI. H +. 12H +. 3 O 2. Lumen. 6H 2 O. 12H +. 6 ATP.

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How Many Plants Would it Take to Keep You Alive?

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  1. How Many Plants Would it Take to Keep You Alive?

  2. CO2 Diffusion in a Leaf

  3. Photosynthetic Electron Transport The “Light” Reactions ATP 6NADPH ADP H+ Stroma 6NADP+ 12H+ Cyt b6f 12e- PSII ATPase 12e- PSI H+ 12H+ 3 O2 Lumen 6H2O 12H+

  4. 6 ATP 6 ADP 3 RuBP (5C) Caboxylation rubisco 3 CO2 (1C) 6 PGA (3C) 6 ATP PGA Kinase 6 ADP Reduction 6 1,3 BisPGA (3C) 6 NADPH GAPDH 6 NADP GAP GAP GAP GAP (3C) GAP GAP DHAP (3C) DHAP (3C) Sucrose, Starch, other Fun Stuff S1,7BP (7C) F1,6BP (6C) SBPase FBPase S7P (7C) Regeneration F6P (6C) X5P (5C) R5P (4C) X5P (5C) E4P (4C) Ru5P (5C) Ru5P (5C) Ru5P (5C) Stroma PRK

  5. CO2 Sugars Calvin Cycle CO2 Uptake Produces Sugars ADP NADP+ Photosynthesis, Our Life Support System! ATP NADPH H+ 4H+ Light Reactions Splits H2O O2 Production NADPH and ATP 8H+ 4H+ O2 H2O 4H+

  6. The Greenhouse Effect Put To Good Use ! atmosphere Infrared light detector Infrared light Source air flow

  7. Measuring Water Vapor • Relative Humidity (%) • Partial Pressure (kPa) • Mole Fraction (ppt) • Dew Point (°C)

  8. Photometric Sensor Quantum Sensor Units: Lux or Footcandles Units: µmol m-2 s-1 or µE m-2s-1 Measuring Irradiance PAR = Photosynthetically Active Radiation 400 – 700 nm PPFD = Photosynthetic Photon Flux Density, also called Quantum Flux

  9. Conditions to Measure Photosynthesis At • What Factors Could influence the Photosynthetic rate of the plant? • What conditions are the most realistic for how our life support plants will be growing and photosynthesizing

  10. LI-COR 6400

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