Page 149 - Ultimate Visual Dictionary (DK)

FER TILIZATION
THE PROCESS OF FERTILIZATION
Anther Stamen Remains of stigma Generative nucleus
Filament and style (divides to form two Pollen tube
Carpel
male gametes) nucleus
Ovary
Pollen grain Pore
Anther lands on stigma
Stamen
Filament
Surface of stigma
Pollen
tube
Sepal
Male gamete Pollen
Pedicel Prickle (sex cell) tube
(flower Sepal nucleus
stalk) Pedicel POLLEN GRAIN GERMINATES
(flower stalk)
Pollen grain Stigma
2. FERTILIZATION HAS TAKEN 3. OVARIES BEGIN TO SWELL;
PLACE; PETALS FALL OFF STAMENS WITHER AND DIE Style
Pollen tube
Polar nucleus
Exocarp Remains Antipodal
(outer layer of style cell
Exocarp Remains of pericarp)
(outer of style
layer of Carpel Ovary Ovule
pericarp) Carpel
Micropyle
Remains of (entrance
stamen to ovule)
Remains Embryo sac
of stamen Ovum Male gamete
(female gamete) Receptacle
Sepal
MALE GAMETES TRAVEL TO
EMBRYO SAC
Sepal Pedicel Pedicel Nucellus
(flower stalk) (flower stalk) (layer surrounding Antipodal cell
embryo sac)
Integument
(outer part
5. CARPELS EXPAND AND BECOME 6. CARPELS EXPAND of ovule)
MORE FLESHY FURTHER 2nd male gamete
fuses with polar 1st male
Exocarp nuclei to form gamete fuses
(outer layer Remains Remains of style endosperm nucleus with ovum to
of pericarp) of style form embryo
Synergid nucleus
(disappears after Pollen tube reaches
Drupelet fertilization) ovum via micropyle
FERTILIZATION
Drupelet
Exocarp
(outer Style and
layer of stigma wither
pericarp)
Testa
Remains Endosperm (seed coat)
of stamen (food store)
Cotyledon
Remains
Remains of stamen Pericarp (seed leaf)
of sepal (maturing Plumule
Pedicel Pedicel ovary wall)
(embryonic
(flower (flower Remains shoot)
stalk) stalk) of sepal
Embryo plant Radicle
(embryonic
10. DRUPELETS (COLLECTIVELY 11. DRUPELETS RIPEN FULLY root)
AN AGGREGATE FRUIT) EXPAND
DEVELOPMENT OF EMBRYO
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