Sexual reproduction in
Flowering plants
Contents
I. Flowers
II. Pre fertilisation
III. Double fertilisation
IV. Post fertilisation
V. Apomixes and Polyembryony
, Flowers
Flowers are the reproductive structure in flowering plants
Male parts of the flower
Known as stamens
Comprise of anther and filament
Female parts of the flower
Known as pistil
Comprise of stigma, style and ovary
Pre Fertilisation: Structures and Events
Androecium (Male reproductive structures)
The proximal end of the filament is attached to the
thalamus of the flower.
In angiosperms, the anther is bilobed, with each lobe
having two theca. Therefore they are dithecous.
The anther is a four sided structure consisting of
four microsporangia, two in each lobe
The microsporangia develops further and become
pollen sacs
A microsporangia is surrounded by four wall
layers- the epidermis, endothecium, middle layers
and tapetum.
The outer three layers perform the function of
protection and help in dehiscence of the anther,
Flowering plants
Contents
I. Flowers
II. Pre fertilisation
III. Double fertilisation
IV. Post fertilisation
V. Apomixes and Polyembryony
, Flowers
Flowers are the reproductive structure in flowering plants
Male parts of the flower
Known as stamens
Comprise of anther and filament
Female parts of the flower
Known as pistil
Comprise of stigma, style and ovary
Pre Fertilisation: Structures and Events
Androecium (Male reproductive structures)
The proximal end of the filament is attached to the
thalamus of the flower.
In angiosperms, the anther is bilobed, with each lobe
having two theca. Therefore they are dithecous.
The anther is a four sided structure consisting of
four microsporangia, two in each lobe
The microsporangia develops further and become
pollen sacs
A microsporangia is surrounded by four wall
layers- the epidermis, endothecium, middle layers
and tapetum.
The outer three layers perform the function of
protection and help in dehiscence of the anther,
