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Photosynthesis:

Photosynthesis:. Photoautotrophs in action. Photosynthesis. Light energy Chemical energy Autotrophs are important to our biosphere. WHY?. Mesophyll. chloroplast. vein. stomata. Leaf cross-section. So where are we?. Chloroplasts. Photosynthesis occurs in the chloroplast.

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Photosynthesis:

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  1. Photosynthesis: Photoautotrophs in action

  2. Photosynthesis • Light energy Chemical energy • Autotrophs are important to our biosphere. • WHY?

  3. Mesophyll chloroplast vein stomata Leaf cross-section So where are we?

  4. Chloroplasts Photosynthesis occurs in the chloroplast

  5. Light spectrum Increasing energy Gamma X-rays UV Infrared Microwaves Radio Visible light Wavelength (nm) 600 nm

  6. Chloroplast pigments Chloroplasts contain many pigments: • Chlorophyll a • Chlorophyll b • Carotenoids • Anthocyanins • Xanthophyll

  7. A new equation… Light

  8. Overview of Photosynthesis Light NADP+ ADP + P Calvin Cycle Light Reactions

  9. Cyclic Photophosphorylation e- Excited state Light Heat Light (fluoresence) Ground state Chlorophyll molecule

  10. Primary electron acceptor NADP+ Primary electron acceptor Electron transport chain Primary electron acceptor Reaction- center chlorophyll NADPH-producing Photosystem Water-splitting Photosystem Non-cyclic photophosphorylation Light

  11. INPUT 3 CO2 3 RuBP 6 3-PGA 6 3 ADP 6 ADP + 6 Calvin cycle 6 3 6 NADP+ 5 G3P 6 G3P 1 G3P Glucose and other compounds OUTPUT Calvin Cycle

  12. Overview of Photosynthesis NADP+ ADP + P Calvin Cycle Light Reactions

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