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Reproduction in Flowering Plants. Teaching and Learning Resources . By Napaporn Tunya. The Parts of a Flower. Most flowers have four parts: sepals, petals, stamens, carpel. The parts of a flower. Sepals protect the bud until it opens. Petals attract insects. Stamens make pollen.

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reproduction in flowering plants

Reproduction in Flowering Plants

Teaching and Learning Resources

By

Napaporn Tunya

NAPAPORN TUNYA

the parts of a flower
The Parts of a Flower
  • Most flowers have four parts:
  • sepals,
  • petals,
  • stamens,
  • carpel.

NAPAPORN TUNYA

the parts of a flower3
The parts of a flower
  • Sepals protect the bud until it opens.
  • Petals attract insects.
  • Stamens make pollen.
  • Carpel grow into fruits which contain the seeds.

NAPAPORN TUNYA

stamen male
Stamen (male)
  • Anther: pollen grains grow in the anther.
  • When the grains are fully grown, the anther splits open.

NAPAPORN TUNYA

pistil female
Pistil (female)
  • Stigma
  • Style
  • Carpel (ovary)
  • Ovules (eggs)

NAPAPORN TUNYA

pollination
Pollination
  • Flowering plants use the wind, insects, bats, birds and mammals to transfer pollen from the male (stamen) part of the flower to the female (stigma) part of the flower.

NAPAPORN TUNYA

pollination7
Pollination
  • A flower is pollinated when a pollen grain lands on its stigma.
  • Each carpel grows into a fruit which contains the seeds.

NAPAPORN TUNYA

fertilisation
Fertilisation
  • Pollen grains germinate on the stigma, growing down the style to reach an ovule.
  • Fertilised ovules develop into seeds.
  • The carpel enlarges to form the flesh of the fruit and to protect the ovary.

NAPAPORN TUNYA

wind pollination
Wind pollination
  • Some flowers, such as grasses, do not have brightly coloured petals and nectar to attract insects.
  • They do have stamens and carpel.
  • These flowers are pollinated by the wind.

NAPAPORN TUNYA

seed dispersal
Seed dispersal

Seeds are dispersed in many different ways:

  • Wind
  • Explosion
  • Water
  • Animals
  • Birds
  • Scatter

NAPAPORN TUNYA

how birds and animals help seed dispersal
How birds and animals help seed dispersal
  • Some seeds are hidden in the ground as a winter store.
  • Some fruits have hooks on them and cling to fur or clothes.

NAPAPORN TUNYA

how birds and animals help seed dispersal12
How birds and animals help seed dispersal
  • Birds and animals eat the fruits and excrete the seeds away from the parent plant.

NAPAPORN TUNYA

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NAPAPORN TUNYA