Sexual Reproduction in Plants
- Created by: rainbowdash
- Created on: 14-01-13 13:53
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Sexual Reproduction in Plants
INSECT POLLINATED PLANT
Pistil (Female) = Stigma, Style, Ovary
Stamen (Male) = Anthers, Filaments
Carpel = Pistil + Receptable
POLLINATION
Is the process of introducing pollen grains (containing the male gametes) are brought into contact with the female part of the flower (carpel)
Self-polinating plants have less genetic variation than plants pollinated by others, but still have genetic variation due to mutation
WIND POLLINATED PLANTS
Ryegrass is one example of a wind-pollinated plant
- Z = Bracht (modified petal for protection)
- Y= Feathery stigma (better capture of pollen in wind)
- X = Ovary
- W = Anthers (low hanging better exposure to wind and pollen in wind)
COMPARISON
- Insect Pollinated
- Stamen within and protected by petals
- Have a nectary
- Brightly coloured petals
- Smooth stigma
- Large Pollen
- Hooks/Spikes on pollen to make it stick
- Scented to attract pollinators
- Wind Pollinated
- Stamen hang outside corolla (petals)
- No nectary
- Dull green or no petals
- Feathery stigma to aid pollen capture
- Smaller…
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