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1. Review of reproductive biology 2. Pollination Ecology

On the Function of Flowers. 1. Review of reproductive biology 2. Pollination Ecology. -variation in flowers -life cycle. -precise placement -outcrossing -pollination syndromes. Figure 38.2 Review of an idealized flower. Figure 38.3a Trillium.

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1. Review of reproductive biology 2. Pollination Ecology

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  1. On the Function of Flowers 1. Review of reproductive biology 2. Pollination Ecology -variation in flowers -life cycle -precise placement -outcrossing -pollination syndromes

  2. Figure 38.2 Review of an idealized flower

  3. Figure 38.3a Trillium

  4. Figure 38.3f Sagittaria: staminate flowers (left), carpellate flowers (right)

  5. Figure 38.3ex Begonia, a monoecious species

  6. Figure 38.3d2 Aloe

  7. Figure 38.3b Lupines

  8. On the Function of Flowers 1. Review of reproductive biology 2. Pollination Ecology -variation in flowers -life cycle -precise placement -outcrossing -pollination syndromes

  9. Figure 38.1 Simplified overview of angiosperm life cycle

  10. Figure 38.3ax2 Lily

  11. Figure 38.4 The development of angiosperm gametophytes (pollen and embryo sacs)

  12. 4 Microspores Tube Cell Generative Cell Dispersed Pollen Grain Pollen Coat

  13. Figure 38.5 Pollen grains have tough, ornate, and distinctive walls

  14. Figure 38.3ax1 Lily

  15. Cross Section of an Ovary One ovule just after meiosis

  16. Figure 38.4 The development of angiosperm gametophytes (pollen and embryo sacs)

  17. Four-nuclear female gametophyte after two mitotic divisions of the megaspore) Mature female gametophyte Egg

  18. Figure 38.9 Growth of the pollen tube and double fertilization

  19. Figure 38.10 The development of a dicot plant embryo

  20. http://gened.emc.maricopa.edu/bio/bio181/BIOBK/BioBookflowersII.htmlhttp://gened.emc.maricopa.edu/bio/bio181/BIOBK/BioBookflowersII.html

  21. Figure 30.17 The life cycle of an angiosperm

  22. On the Function of Flowers 1. Review of reproductive biology 2. Pollination Ecology -life cycle -variation in flowers -precise placement -outcrossing -pollination syndromes

  23. On the Function of Flowers 1. Review of reproductive biology 2. Pollination Ecology -life cycle -variation in flowers -precise placement -outcrossing -pollination syndromes

  24. Three paths for pollen flow: selfing: 1. Within flower 2. Between flowers 3. outcrossing (between plants)

  25. Red Maple Flowers staminate pistillate

  26. Figure 38.3e Maize, a monoecious species

  27. syndromes

  28. Foxgloves and outcrossing

  29. Figure 38.3bx1 Foxglove

  30. Three components to outcrossing in foxglove 1. Young flowers are male, old are female 2. Young flowers are nearer the top 3. Bees fly up. Male zone Then start over at the bottom Bees fly up Female zone

  31. On the Function of Flowers 1. Review of reproductive biology 2. Pollination Ecology -life cycle -variation in flowers -precise placement -outcrossing -pollination syndromes

  32. -pollination syndromes Hummingbird -- -long tube -red color -abundant nectar - no odor - no landing

  33. -pollination syndromes Bat -- -abundant pollen -white or drab color -abundant nectar - good odor - strong landing

  34. Banana (Musa), pollinated by bats, dispersed by monkeys

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