The process of producing offspring is
called reproduction
there are two modes of reproduction in
plants sexual reproduction and asexual
reproduction
The combination or fusion of female and male gametes is
called sexual reproduction.
Sexual reproduction starts with
pollination which is the transfer of
pollen grains from the anther to the
stigma of a flower. The male gametes of a
flower are carried in pollen grains and
the female gametes are carried in ovules.
Most flowers have both male and female
parts in one flower such flowers are
they prefer self pollination.
On the other hand some plant species
have separate male and female flowers
such flowers are called unisexual
flowers, these flowers require
cross-pollination for reproduction.
For example tomatoes and pea have
bisexual flowers
while cucumbers have flowers that are unisexual.
unisexualWhen Pollen falls onto a Flores stigma
it forms a pollen tube that leads to the
flowers ovary there the Pollen cells
fuse with the female gametes in the
ovule to form a seed this seed carries a
baby plant called an embryo inside of it
each time a seed is planted into the
soil and treated with appropriate
conditions it grows into a seedling
which eventually grows into a new plant
sexual reproduction happens inside of a
therefore flowers are the reproductive
parts of plants but what is a sexual reproduction.
We know that plants have roots
stems and leaves these parts are called
the vegetative parts of a plant. When a
new plant is formed using these parts
the process is called vegetative
propagation or asexual reproduction in
Asexual reproduction the fusion of female
and male gametes is not required let's
see how asexual reproduction takes place.
T ,here are different methods of
vegetative reproduction cutting layering,
grafting
and mudding let's have a look at each
method in detail
The method of cutting, the rose plant can be grown by
cutting off part of its stem with two or
more nodes and then planting it in the
ground. This stem will grow into new
plant.
In some plants you don't need to cut the
stem instead a branch can bury itself in
the soil at the same time it is still attached to
the parent plant this branch is called a
layer or a runner.
The layer develops new roots and leaves
and eventually goes into new plant this
is known as layering.
Did you know that grass is propagated by layering?
Most interesting type of vegetative
reproduction is grafting
In grafting a twig from one tree is
joined to a stem from another tree of
the same kind.
Grafting is most often done with fruit
trees like citrus and mango trees to
produce new and improved varieties.
Budding is like grafting except that a
bud is used instead of a twig
the bud is joined to the base of a young
plant and the rest of the host plant is
cut off. Later the bug grows into its own
kind of plant
budding is also done in fruit trees like peach and plum trees.
Summary The process of producing offspring is
called reproduction. There are two
methods of reproduction in plants sexual
reproduction and asexual reproduction
production.
Flowers are the organs of reproduction
during pollination pollen grains which
contain male gametes fuse with the
female gametes in the ovary
seeds are formed at the end of sexual
reproduction.
In asexual reproduction vegetative parts
of a parent plant directly produce
offspring there is no need for fusion
between male and female gametes Examples
of this include cutting, layering,
grafting and budding no seeds are formed
at the end of asexual reproduction.
Comments
Post a Comment