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1. Review of reproductive biology 2. Pollination Ecology On the Function of Flowers -precise placement -outcrossing -variation in flowers -life cycle
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Figure 38.2 Review of an idealized flower
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Figure 38.3a Trillium
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1. Review of reproductive biology 2. Pollination Ecology On the Function of Flowers -precise placement -outcrossing -variation in flowers -life cycle
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Figure 38.1 Simplified overview of angiosperm life cycle
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Figure 38.3ax2 Lily
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Figure 38.4 The development of angiosperm gametophytes (pollen and embryo sacs)
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Dispersed Pollen Grain Generative Cell Tube Cell Pollen Coat 4 Microspores
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Figure 38.5 Pollen grains have tough, ornate, and distinctive walls
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Figure 38.3ax1 Lily
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Cross Section of an Ovary One ovule just after meiosis
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Figure 38.4 The development of angiosperm gametophytes (pollen and embryo sacs)
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Mature female gametophyte Egg Four-nuclear female gametophyte after two mitotic divisions of the megaspore)
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Figure 38.9 Growth of the pollen tube and double fertilization
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Figure 38.10 The development of a dicot plant embryo
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http://gened.emc.maricopa.edu/bio/bio181/BIOBK/BioBookflowersII.html
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Figure 30.17 The life cycle of an angiosperm
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1. Review of reproductive biology 2. Pollination Ecology On the Function of Flowers -precise placement -outcrossing -life cycle -variation in flowers
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Angraecum (Orchidaceae)
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1. Review of reproductive biology 2. Pollination Ecology On the Function of Flowers -precise placement -outcrossing -life cycle -variation in flowers
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Three paths for pollen flow: selfing: 1. Within flower 2. Between flowers 3. outcrossing (between plants)
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Red Maple Flowers staminate pistillate
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Figure 38.3e Maize, a monoecious species
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syndromes
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Foxgloves and outcrossing
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Figure 38.3bx1 Foxglove
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Female zone Male zone Bees fly up Then start over at the bottom 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.
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