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PS II (P680) PS I (P700) 4 photons 2 H 2 O  O 2 + 4 H + 4 e - 2 NADP + 4 H + + 2 NADP +  2 NADPH + 2 H + 4 e - 4 photons 4 e - Noncyclic photophosphorylation.

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Presentation on theme: "PS II (P680) PS I (P700) 4 photons 2 H 2 O  O 2 + 4 H + 4 e - 2 NADP + 4 H + + 2 NADP +  2 NADPH + 2 H + 4 e - 4 photons 4 e - Noncyclic photophosphorylation."— Presentation transcript:

1 PS II (P680) PS I (P700) 4 photons 2 H 2 O  O 2 + 4 H + 4 e - 2 NADP + 4 H + + 2 NADP +  2 NADPH + 2 H + 4 e - 4 photons 4 e - Noncyclic photophosphorylation 1(4) photons 3(4) ADP + 3(4) P i  3(4) ATP + 3(4) H 2 O Cyclic photophosphorylation electron acceptor electron acceptor 4 e - Oxidation of water Reduction of NADP + Noncyclic electron transport Figure 17.1 Ecological Climatology © 2008 G. Bonan

2 Figure 17.2 3 CO 2 + 3 H 2 O 6 PGA 6 H + + 6 NADPH 6 NADP + 6 ATP 6 ADP + 6 P i 1 PGaldehyde 5 PGaldehyde 3 RuBP 3 ATP 3 ADP + 3 P i Carboxylation Reduction Regeneration 3 [  ] 6 [    ] 5 [    ] 1 [    ] 3 [      ] Ecological Climatology © 2008 G. Bonan

3 Figure 17.3 0 10 20 30 40 50 0.01.02.03.04.05.0 Vapor Pressure Deficit (kPa) 0 10 20 30 40 50 -50510152025303540 Temperature (  C) 0 10 20 30 40 50 0200400600800100012001400 Photosynthetic Photon Flux Density (  mol m -2 s -1 ) Stomatal Conductance (mmol CO 2 m -2 s -1 ) 0 10 20 30 40 50 -2.5-2.0-1.5-0.50.0 Foliage Water Potential (MPa) Stomatal Conductance (mmol CO 2 m -2 s -1 ) 25  C 35  C Ecological Climatology © 2008 G. Bonan

4 Figure 17.4 -100102030405060 Temperature (  C) CO 2 Flux Respiration Photosynthesis Net Net CO 2 Flux -10  C45  C25  C Ecological Climatology © 2008 G. Bonan

5 Figure 17.5 0 2 4 6 8 0.01.02.03.04.05.0 Vapor Pressure Deficit (kPa) 25  C 35  C 0 2 4 6 8 1.001.251.501.752.00 Foliage Nitrogen (g m -2 ) 0 2 4 6 8 0100200300400500600 CO 2 Concentration (ppm) Net Photosynthesis (  mol m -2 s -1 ) 0 2 4 6 8 -2.5-2.0-1.5-0.50.0 Foliage Water Potential (MPa) Net Photosynthesis (  mol m -2 s -1 ) 0 2 4 6 8 0200400600800100012001400 Photosynthetic Photon Flux Density (  mol m -2 s -1 ) Net Photosynthesis (  mol m -2 s -1 ) 0 2 4 6 8 -50510152025303540 Temperature (  C) Ecological Climatology © 2008 G. Bonan

6 Figure 17.6 0 1 2 3 4 5 6 7 8 05101520253035404550 Stomatal Conductance (mmol CO 2 m -2 s -1 ) Net Photosynthesis (  mol CO 2 m -2 s -1 ) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 Transpiration (mmol H 2 O m -2 s -1 ) 0 1 2 3 4 5 6 7 8 05101520253035404550 Stomatal Conductance (mmol CO 2 m -2 s -1 ) Net Photosynthesis (  mol CO 2 m -2 s -1 ) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 Transpiration (mmol H 2 O m -2 s -1 ) Photosynthesis Transpiration Ecological Climatology © 2008 G. Bonan

7 Figure 17.7 0 5 10 15 20 25 30 35 0100200300400 Maximum Photosynthesis (  mol CO 2 m -2 s -1 ) Maximum Leaf Conductance (mmol H 2 O m -2 s -1 ) savanna grass semi-arid shrub desert annual tropical swamp tundra tundra decid. shrub boreal conifer tundra ever. shrub tropical rainforest temperate deciduous Mediterranean shrub Woody Herbaceous Ecological Climatology © 2008 G. Bonan

8 Figure 17.8 PPFD (  mol photons m -2 s -1 ) Photosynthesis (  mol CO 2 m -2 s -1 ) WjWj WjWj WcWc 0 5 10 15 20 02004006008001000 Ecological Climatology © 2008 G. Bonan

9 Figure 17.9 0 50 100 150 200 250 300 350 020406080100120140160 V max (  mol m -2 s -1 ) J max (  mol m -2 s -1 ) Crop (dicot) Crop (monocot) Fruit tree Vegetable Tropical tree Herb Desert annual and perennial Shrub Temperate broadleaf deciduous tree Temperate needleleaf evergreen tree Ecological Climatology © 2008 G. Bonan

10 Figure 17.10 0 50 100 150 200 05101520253035 Leaf Nitrogen (mg N g -1 ) Maximum Net Photosynthesis (nmol CO 2 g -1 s -1 ) 0 50 100 150 200 050100150200250300350 Maximum Net Photosynthesis (nmol CO 2 g -1 s -1 ) Specific Leaf Area (cm 2 g -1 ) 0 5 10 15 20 25 30 35 050100150200250300350 Leaf Nitrogen (mg N g -1 ) Specific Leaf Area (cm 2 g -1 ) Broadleaf deciduous tree Needleleaf evergreen tree Ecological Climatology © 2008 G. Bonan

11 Figure 17.11 0 10 20 30 40 50 60 70 0102030405060 Leaf Nitrogen (mg N g -1 ) Leaf Respiration (nmol CO 2 g -1 s -1 ) 0 10 20 30 40 50 60 70 01224364860728496 Leaf Lifespan (months) Broadleaf forb Broadleaf shrub Broadleaf tree Needleleaf tree Leaf Respiration (nmol CO 2 g -1 s -1 ) 0 10 20 30 40 50 60 70 0100200300400500 Specific Leaf Area (cm 2 g -1 ) Leaf Respiration (nmol CO 2 g -1 s -1 ) Ecological Climatology © 2008 G. Bonan

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