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The light environment of plants and photosynthetic adaptations

REWM 3500 Rangeland Plant Ecophysiology Friday, September 4, 2009. The light environment of plants and photosynthetic adaptations. Light response curve of photosynthesis Adaptation and acclimation to variable light conditions. 9.7 Response of photosynthesis to light in a C 3 plant.

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The light environment of plants and photosynthetic adaptations

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  1. REWM 3500 Rangeland Plant Ecophysiology Friday, September 4, 2009 The light environment of plants and photosynthetic adaptations • Light response curve of photosynthesis • Adaptation and acclimation to variable light conditions

  2. 9.7 Response of photosynthesis to light in a C3 plant

  3. 9.8 Light-response curves of photosynthetic carbon fixation in sun and shade plants

  4. 9.10 Light-response of photosynthesis of a sun plant grown under sun or shade conditions

  5. 9.11 Changes in photosynthesis in individual needles, a complex shoot, and a forest canopy

  6. 9.1 Leaf anatomy from a legume (Thermopsis montana) grown in different light environments

  7. Sun Shade Upper palisade parenchyma Lower palisade parenchyma Spongy parenchyma

  8. Terms to know: • Light response curve • Light compensation point (LCP) • Apparent light use efficiency (phi, θ) – initial slope • Maximum rate of photosynthesis - Amax • Dark respiration (Rd) • Light limited part of curve • Carboxylation limited part of curve • Sun and shade leaves • Palisade layer • Spongy layer • Grana stacks • Leaf level adaptation and acclimation

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