Photosynthesis light dependent reaction

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Photosynthesis light dependent reaction

  1. 1. Two metabolic pathways LIGHT DEPENDENT LIGHT INDEPENDENT 16 ADP + 16Pi 16 ATP 12 NADP + 12H 12 NADPH12 H2O 24 H+ + 6O2
  2. 2. LIGHT DEPENDENT LIGHT INDEPENDENTIN: THYLAKOID STROMAUSES: WATER, LIGHT CO2, ATP, NADPHPRODUCES: HIGH ENERGY COMPOUNDS GLUCOSE
  3. 3. LIGHT DEPENDENT REACTIONS1. OCCURS PHOTOSYSTEMS = EMBEDDED IN THYLAKOID MEMBRANE2. CHLOROPHYLL KEY LIGHT CAPTURING MOLECULE ABSORBS LIGHT IN WAVELENGTHS OF RED, BLUE, VIOLET3. ACCESSORY PIGMENTS CAROTENOIDS AND PHYCOCYANINS4. PHOTOSYSTEMS – TWO DIFFERENT ONES a. Types PHOTOSYSTEM I PHOTOSYSTEM II
  4. 4. GENERAL ABOUT PHOTOSYSTEMS1. THEY ARE EACH A LIGHT HARVESTING COMPLEX2. GROUP OF MOLECULES (PROTEINS, CHLOROPHYLL, ACCESSORY PIGMENTS, e- CARRIER MOLECULES) THAT WORK TOGETHER TO HARVEST LIGHT INTO HIGH ENERGY COMPOUNDS3. STRUCTURE - 2 PARTS • LIGHT HARVESTING COMPLEX = 300 CHLOROPHYLL & ACCESSORY • e- TRANSPORT CHAIN = SERIES OF e- CARRIER MOLECULES IN MEMBRANE
  5. 5. Photosystem structure ATP SYNTHASE T H Y L A K O I D Rxn Ctr P700 M Rxn Ctr P680 E M B Photosystem II Photosystem I
  6. 6. ATP SYNTHASETHYLAKOID Rxn Ctr P700M Rxn Ctr P680EMB Photosystem II Photosystem I
  7. 7. ATP SYNTHASETHYLA 2e-K 2e-OID Rxn Ctr P700M Rxn Ctr P680EMB Photosystem II Photosystem I
  8. 8. H+ H+ H+ H+OUTSIDE THYLAKOID H+ H+ H+ H+ ATP SYNTHASE T H Y L A 2e- K 2e- O I D Rxn Ctr P700 M Rxn Ctr P680 E M B Photosystem II Photosystem I INSIDE THYLAKOID
  9. 9. H+ H+ H+ H+ H+ H+ H+ H+ ATP SYNTHASETHYLA 2e-K 2e-OIDME 12H2OMB 24H+ + 6O2 Photosystem II Photosystem I
  10. 10. H+ H+ H+ H+ 16 ATP H+ H+ H+ H+ 16 ADP + P ATP SYNTHASETHYLA 2e-K 2e-OIDME 12H2OMB 24H+ + 6O2 Photosystem II Photosystem I
  11. 11. H+ H+ H+ H+ 16 ATP H+ H+ 12 NADPH 12 NADP + 12 H H+ H+ 16 ADP + P ATP SYNTHASETHYLA 2e-K 2e-OIDME 12H2OMB 24H+ + 6O2 Photosystem II Photosystem I

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