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THE REPRODUCTIVE PART OF PLANT IS A FLOWER

Sexual Reproduction

In

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Flowering Plants

PREPARED BY REKHA CHOUDHARY T.G.T SCIECNE

The Carpel

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The female part of the flower is called the Carpel.

The Stamen

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The male parts of the flower are called Stamens.

Stamens

(male reproductive parts).

Anther

The top of the Stamen is called the Anther.

Filament

The Filament acts in the same way as a stem and holds up the Anther.

What is the yellow powder on the Anther?

Pollen grains

Carpel

(female reproductive part).

Stigma

The top of the Carpel is called the Stigma.

Style

The Style acts in the same way as a stem and holds up the Stigma.

Ovary

The ovary contains the eggs.

Pollination

Transfer of pollen grains from anther to stigma of a flower

pollen

stigma

If the pollen grains are transferred from the anther to the stigma of the same flower it is self pollination

If it is transferred from the anther of one flower to the stigma of another flower it is cross pollination.

Pollination takes place by insects, wind, water etc.

Pollen sticks to insects and as they move around the pollen sticks to the stigma.

During windy days the pollen get blown from the anther to the stigma.

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After the pollen grain is transferred to the stigma it produces a pollen tube which passes through the style and enters the ovary and ovule.

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pollen

stigma

eggs

zygote

When the pollen germ cell fuses with the eggs in the ovule to form a zygote this process is called Fertilisation.

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Fertilisation

SEED AND FRUIT

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Once fertilisation has taken place , the zygote (fertilised ovule) becomes a seed, and the ovary becomes a fruit.

The petals die and fall off.

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