Environmental plant physiology • Limitations in photosynthesis • Light • Carbon dioxide
Environmental plant physiology
• Limitations in photosynthesis
• Light• Carbon dioxide
Limitations
• Optimal PS requires• Rubisco acitivity• Regeneration of RuBP• Metabolism of Triose phosphates
Sun and shade leavesSun leaf Shade leaf
• Sun leaves thicker, palisade cells elongated, more rubisco, more xanthophyll cycle components
• Shade leaves thinner, more total chlorophyll per reaction center, more chl b,
Sun and shade plants
Light levels
Carbon Dioxide Levels
C3 vs C4
CAM plants
C3 and C4 plants
Comparison of photosynthetic characteristics
Isotope discrimination