2. What is Pollination?
Pollination is the process of transfer of pollen
grains from anther to the stigma of a flower of the
same species for reproduction.
3. Parts of a Flower
Stigma
Anther
Style
Stamen
Filament
Ovary
Ovule
Petal
Sepal
Carpel
4. Types Of Pollination
Cross Pollination
Self pollination
Pollination that occurs Pollination that occurs
between two different
within same flower
flowers of same species
5. Means Of Pollination:
• Wind: Pollination that is facilitated by the wind.
• Insect : Pollination that occurs through insects,
sometimes animals and birds also facilitate
pollination when the pollen grains get stuck to their
coat on their visit to the plant for shelter, food, etc.
• Water: Water facilitates pollination in very few
terrestrial plants, example: Bog Asphodel.
However water is the main means of pollination in
aquatic plants.
6. Means Of Pollination:
Wind
Anthers are exposed
to the wind so that
pollen can easily be
blown away
Stigma are
feathery/ sticky to
catch pollen
Petals are small so carried by the wind
that the pollen grains
can be blown away
Water
Insect
Brightly
coloured petals
Sticky stigma to attract insects
to
collect pollen
Anthers
positioned to
rub pollen onto
insects
Nectar and a scent present
also to attract insects
7. What happens after Pollination?
• Once pollination has taken place,
a pollen tube grows towards the
ovary with the help of chemical
processes.
• The pollen grain reaches the
ovary through this tube and fuses
with the ovule to form a zygote.
This is called fertilization.
• After this petals and the stamen
fall off.
• The ovules develop into seeds
and the ovary develops into the
fleshy fruit.
Stigma
Style
Carpel
Ovary
Ovule
