Fertilization procees in rice plants
can be divided into five steps, which are illustrated below.
For more detail of Flowering
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of Carpel, where Fertilization occurs
Pollination takes place immediately
before the anthesis. Anthers
elevate by elongating the stamen filaments, and
untimately they go out the spikelet during anthesis.
When anthers touch stigma, some
pollen are left on the stigma.
The stigma can receive pollen also
during the flowering, when the spikelet opens.
Within 2 to 3 minutes, the pollen left
on stigma starts to germinate, to grow pollen tube toward the egg cell.
Pollen tubes are the pathways for sperm
to reach the egg.
Penetration of PollenTube into the Ovule
The pollen tube reaches the ovule.
It happens within 15-60 minuts after
the pollen tube starts growing.
The rice plant carries out double fertilization
as many other higher plants do.
Step 1: Fertilization
of the Egg
Step 2: Fertilization
of the Polar Nuclei in the Embryo Sac
Division of the Fertilized Egg (Zygote)
Fertilization is completed.
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In the following morning, the fertilized
egg begins cell division to develop into an embryo.
An embryo is a baby of the plant, which
is kept dormant in the seed until
the right condition for germination comes.
© Thomas L. Rost 1997
Section of Plant Biology
Division of Biological Sciences
UNIVERSITY OF CALIFORNIA, DAVIS