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Chapter 31.2

Chapter 31.2. A Closer Look at Flowers and Their Pollinators . AP Biology Spring 2011. Pollination Vectors. Pollination Vectors: agents that bring pollen grains to female floral parts Wind currents, insects, birds, or other animals. Pollination Vectors.

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Chapter 31.2

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  1. Chapter 31.2 A Closer Look at Flowers and Their Pollinators AP Biology Spring 2011

  2. Pollination Vectors • Pollination Vectors: agents that bring pollen grains to female floral parts • Wind currents, insects, birds, or other animals

  3. Pollination Vectors Many plants are pollinated by wind which randomly distributes pollen from plant to plant Other plants attract pollinators

  4. Attraction of Pollinators to Flowers • Bright Colours and Strong Patterns: • Carotenoids, anthocyanins • Attract birds, butterflies, and bees

  5. Attraction of Pollinators to Flowers • Fragrant Oils: • Sensory receptors in some animal pollinators are exploited • Intense fruity or musky odors

  6. Attraction of Pollinators to Flowers • Sugar-rich Nectar and Pollen: • Rewards for some pollinators • Reinforces return visits • Nectar: feeds butterflies, bees, and hummingbirds • Pollen: abundant source of vitamins and minerals • Flowers: coevolved to fit precisely with a specific pollinator and exclude others

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