1. review of reproductive biology 2. pollination ecology on the function of flowers -precise...
TRANSCRIPT
1. Review of reproductive biology
2. Pollination Ecology
On the Function of Flowers
-precise placement-outcrossing-pollination syndromes
-life cycle -variation in flowers
1. Review of reproductive biology
2. Pollination Ecology
On the Function of Flowers
-precise placement-outcrossing-pollination syndromes
-life cycle -variation in flowers
Three paths for pollen flow: selfing: 1. Within flower 2. Between flowers 3. outcrossing (between plants)
Red Maple Flowers
staminate
pistillate
Foxgloves and outcrossing
Female zone
Male zone
Bees fly up
Then start over at the bottom
Three components to outcrossing in foxglove1. Young flowers are male, old are female2. Young flowers are nearer the top3. Bees fly up.
Primroses: Outcrossing with Heterostyly
syndromes
1. Review of reproductive biology
2. Pollination Ecology
On the Function of Flowers
-precise placement-outcrossing-pollination syndromes
-life cycle -variation in flowers
-pollination syndromes
Hummingbird --
-long tube-red color-abundant nectar- no odor- no landing
-pollination syndromes
Sphinx Moth --
-long tube-white color-abundant nectar- exquisite odor (periodic)- landing
evening primrose(Oenothera, Onagraceae)
Angraecum (Orchidaceae)
Angraecum sesquipedale
© Esko Puupponen Xanthopan
-pollination syndromes
Beetle -- two variants, nuptial chamber and painted bowlSee Bernhardt 2000 to fix this slide and the next two.
The beetle pollination syndrome - nuptial-chamber variant
• Many stamens often with appendages• Chamber to accommodate several animals• Night-flowering• Without markings• Scent attractant for beetles
-pollination syndromes
Carrion insect --
-contrasting light and dark pattern-brown-purple color-no nectar- foul odor
Carrion-insect flowers
Wild ginger
Jack in the pulpit
wakerobin
Stapelia - African carrion-insect dispersed flower
-pollination syndromes
Wind--
-no perianth-no nectar-imperfect flowers-abundant pollen-big stigmas
Grasses – family Poaceae (Gramineae)
Sparganium - wind-pollinated aquatic
-pollination syndromes
Flowers that mimic insects
-mate mimics-aggressive mimics
Ophrys pollination
1. Review of reproductive biology
2. Pollination Ecology
On the Function of Flowers
-precise placement-outcrossing-pollination syndromes
-life cycle -variation in flowers