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Lecture+21+W+2012

Lecture+21+W+2012 - Lecture 21 Flowering Plants Flowering...

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Flowering plants - Flowers - Pollination (Sexual Encounters of the Floral Kind - movie) - A few clicker questions - Fruits Lecture 21: Flowering Plants
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Flowers grouped on a stem are known as an inflorescence Flowers
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Inflorescences make a more showy display Flowers
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Sunflower ( Helianthus annuus ) Sunflower - Helianthus annus
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Sunflower longitudinal section Sunflower - Helianthus annus
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Disc Floret Ray Floret Sunflower - Helianthus annus
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Not all flowers are showy!
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Hummingbird
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A. Mimulus lewisii --Bee Pollinated C. Mimulus cardinalis-- Humingbird Pollinated Schemske and Bradshaw, PNAS 1999 Pollination Syndromes
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Variation in F2 Schemske and Bradshaw PNAS 1999
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Which Traits affect pollinator visitation? Measure visitation rates in progeny population Look for correlation between floral traits and visitation Increase red -> decrease bee visitation 80% Increase nectar 3-fold, double hummingbird visits (independent of color)
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Flowering plants - Flowers - Pollination (Sexual Encounters of the Floral Kind - movie) - A few clicker questions - Fruits Lecture 21: Flowering Plants
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