Transcript
![Page 1: Limitations in photosynthesis • Light • Carbon dioxideguralnl/gural/330Environmental plant physiology.pdfType of Plant CAM 5- Example Agave americana (century plant) Pinus sy/vestris](https://reader034.vdocument.in/reader034/viewer/2022042104/5e82b92dc1ca966fad4769fd/html5/thumbnails/1.jpg)
Environmental plant physiology
• Limitations in photosynthesis
• Light• Carbon dioxide
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Limitations
• Optimal PS requires• Rubisco acitivity• Regeneration of RuBP• Metabolism of Triose phosphates
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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,
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Sun and shade plants
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Light levels
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Carbon Dioxide Levels
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C3 vs C4
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CAM plants
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C3 and C4 plants
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Comparison of photosynthetic characteristics
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Isotope discrimination