POLLINATION

1
POLLINATION

• Definition Release, transfer and deposit of the
  microgametophyte on the receptive portion of the
  carpel (usually the stigma)
• Function transfer mobile packets of sperm
  (pollen) for sexual reproduction
• Pollination precedes fertilization

2
Flower Structure

• Flower A determinate shoot with sterile and
  fertile modified leaves.
• Fertile modified leaves are sporophylls
• Two types of sporophylls
• Stamens (Androecium)
• Carpel (Gynoecium)

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Flower Modifications

• Complete vs. Incomplete
• Perfect
• Imperfect
• Monoecious
• Dioecious
• Homogamy vs. Dichogamy Timing
• Protogyny Carpel matures first
• Protandry Stamens mature first

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Why so many modifications?

• Breeding System
• Autogamy
• Allogamy
• Geitonogamy
• Xenogamy
• Advantages for outbreeding

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Pollination Vectors

• ABIOTIC
• Wind Anemophily
• Water Hydrophily
• BIOTIC
• Primary Attractants A reward
• Secondary Attractants Stand Out
• Deception

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Dendromecon Bush Poppy
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Tulip
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Salvia columbarie Chia
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Collinsia heterophyla
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Gilia tricolor
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Delphinium
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Sidalcea
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Helianthus Sunflower
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Cereus
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Thalictrum polycarpum Male
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Thalictrum polycarpum Female
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Rhododendron Butterfly
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Cotton Pollen Exine
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Magnolia
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Echinocereus mojavensis
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Catasetum fimbriatum
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Catasetum Male flower
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Catasetum Female flower
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Calochilus robertsonii
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Trichoceros parviflora
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Ophrys cretica
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(No Transcript)
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Sarracenia Purple Pitcher Plant
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Cypripedium acaule Pink Lady Slipper