REPRODUCTION IN FLOWERING PLANTS

Reproduction in Flowering Plants
Mrs. Zemcik
Living Environment
Flower
Sexual reproductive structure

Produces egg and sperm

Fertilization takes place inside the flower
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
Pollination
Transfer of mature pollen grains from the anther to the stigma
-wind
-insects
-birds & other animals
When a pollen grain lands on the stigma, it germinates and a pollen tube grows down through the style to an ovule (egg)
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)
*Self pollination –pollen from same flower

*Cross pollination – pollen from a different flower
- more variation
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
The plant embryo uses food stored in the cotyledon of the seed until it develops leaves for photosynthesis

micropyle –opening in ovule where pollen tube attached, sperm entered

hilum –scar where ovule attached to ovary

radicle –embryonic root
Seedling

Epicotyl – grows above the cotyledons and gives rise to the leaves.
Hypocotyl –below the point of attachment of the cotyledon, develops into the stem.
Parts of a seed
Dicot




Monocot
Seed Germination
This powerpoint was kindly donated to
www.worldofteaching.com


http://www.worldofteaching.com
Is home to well over a thousand powerpoints submitted by teachers. This a free site. Please visit and I hope it will help in your teaching