Photosynthesis: Physiological and Ecological Considerations

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23鍚特卡雲杉The Sitka Spruce (Picea sitchensis) is a large coniferous evergreen tree growingto 50-70 m tall, exceptionally to 90 m tall, and with a trunk diameter of up to 5 m.It acquires its name from the community of Sitka, Alaska.(http://en.wikipedia.org/wiki/Picea_sitchensis)9.3.2 Leaves must dissipate excess light energy24FIGURE 9.12 Excess light energy in relation to a light response curve ofphotosynthetic evolution.12
THE XANTHOPHYLL CYCLE25An epoxide isa cyclic etherwith only threering atoms.FIGURE 7.35 Chemical structure of violazanthin, antheraxanthin, and zeaxanthin.•energy dissipation: As the amount of light incident to a leafincrease, a greater proportion of violaxanthin is converted toantheraxanthin and zeaxanthin.26FIGURE 9.13 Diurnal changes in xanthophyll content as a function ofirradiance in sunflower (Helianthus annuus).13
Page 1 and 2: 1Lincoln Taiz and Eduardo ZeigerPla
Page 3 and 4: 56•Light can be measured as energ
Page 5 and 6: 9.2.1 Light anatomy maximizes light
Page 7 and 8: 9.2.3 Leaf angle and leaf movement
Page 9 and 10: 17(triangle orache)(wild ginger)Das
Page 11: 21(triangle orache)FIGURE 9.10 Ligh
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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