Photosynthesis: Physiological and Ecological Considerations

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11FIGURE 9.4 Optical properties of a bean leaf.9.2.2 Plants compete for sunlight12FIGURE 9.5 The spectral distribution of sunlight at the top of a canopy and underthe canopy.6
9.2.3 Leaf angle and leaf movement can control lightabsorption13FIGURE 9.6 Leaf movement in sun-tracking plants.9.2.4 Plants acclimate and adapt to sun and shade14• Acclimation:a process whereby the newly produced leaf has a setof biochemical and morphological characteristics• Adaptation:a process by which an organism becomes fitted to itsenvironment•Sun and shade leaves:(a) Shade leaves have more total chlorophyll perreaction center, have a higher ratio of chlorophyll b tochlorophyll a, and are usually thinner than sun leaves.(b) Sun leaves have more rubisco and a larger pool ofxanthophyll cycle components than shade.(c) shade leaves PSII: PSI = 3:1sun leaves PSII: PSI = 2:17
Page 1 and 2: 1Lincoln Taiz and Eduardo ZeigerPla
Page 3 and 4: 56•Light can be measured as energ
Page 5: 9.2.1 Light anatomy maximizes light
Page 9 and 10: 17(triangle orache)(wild ginger)Das
Page 11 and 12: 21(triangle orache)FIGURE 9.10 Ligh
Page 13 and 14: THE XANTHOPHYLL CYCLE25An epoxide i
Page 15 and 16: •Two types of photoinhibition29FI
Page 17 and 18: 33Scientific Name: Tidestromia oblo
Page 19 and 20: THE GREENHOUSE EFFECT37FIGURE 9.19
Page 21 and 22: 411 Pa = 1 Newton per meter 2 (N m
Page 23 and 24: 45CO 2 assimilationH 2 O evaporatio

Photosynthesis: Physiological and Ecological Considerations

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