1 / 11

Understanding Photosynthesis: The Role of Plants in Our Survival

Explore the fascinating process of photosynthesis, where plants convert CO2 and sunlight into sugars essential for life. This complex cycle, including the light reactions and the Calvin Cycle, involves the transformation of energy and matter, producing ATP, NADPH, and O2. Discover how factors such as light intensity, humidity, and temperature influence photosynthetic rates, and learn how many plants it would take to sustain human life. This insightful overview highlights the critical balance of nature that supports our ecosystem through photosynthesis.

devaki
Télécharger la présentation

Understanding Photosynthesis: The Role of Plants in Our Survival

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  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

More Related