Reproduction in Flowering Plants

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Slide 1

Reproduction in Flowering Plants

Mrs. Zemcik

Living Environment

Slide 2

Flower

Sexual reproductive structure

Produces egg and sperm

Fertilization takes place inside the flower

Slide 3

Pistil

*Stigma –top of the pistil,

Sticky surface for pollen to stick to

*Style – connects the stigma to the ovary

*Ovary –contains ovules

( eggs)

Stamen

*Anther – produces sperm nuclei by meiosis. Sperm nuclei are enclosed by pollen grains.

*Filament – holds the anther up

Female reproductive organ

Male reproductive organ

Slide 4

Pollination

Transfer of mature pollen grains from the anther to the stigma

-wind

-insects

-birds & other animals

Slide 5

Slide 6

When a pollen grain lands on the stigma, it germinates and a pollen tube grows down through the style to an ovule (egg)

Slide 7

Fertilization

The sperm travels through the pollen tube to the ovule. The sperm & egg fuse forming the zygote (fertilized egg) –this grows into the plant embryo (cells grow by mitosis)

Slide 8

*Self pollination –pollen from same flower *Cross pollination – pollen from a different flower - more variation

Slide 9

The ovary and zygote (fertilized ovule) develop and ripen.

*The ovule forms the seed and the ovary forms the fruit.

A fruit is a ripened ovary

Slide 10

The plant embryo uses food stored in the cotyledon of the seed until it develops leaves for photosynthesis

Slide 11

Seedling

micropyle –opening in ovule where pollen tube attached, sperm entered hilum –scar where ovule attached to ovary radicle –embryonic root

Slide 12

Epicotyl – grows above the cotyledons and gives rise to the leaves.

Hypocotyl –below the point of attachment of the cotyledon, develops into the stem.

Slide 13

Parts of a seed