Transcript File - Banguitan National High School

Long Test No. 1 (Feb. 4)
Pointers for Review
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Reproduction in Plants
1. Sexual Reproduction
- Parts of a Flower
- Pollination
- Fertilization
- Seed Dispersal & Germination
2. Asexual Reproduction
- Natural Vegetative Propagation
- Artificial Vegetative Propagation
Quiz # 3 on Thursday
1.
2.
3.
Seed germination
Needs of a growing seed
Asexual Reproduction
- Natural Vegetative Propagation
- Artificial Vegetative Propagation
Asexual
Reproduction
(plants)
Plants are
important part of
the environment
and our lives. In
fact, many of our
needs are being
sustained by the
different plants
around us.
Can you name
some important
things or needs
we get from
plants?
Growing plant
Flowering plant
Germination
Pollination
Dispersal of seeds
Fertilization
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Some plants don't
produce flowers
and seeds. Plants
such as ferns
and mosses are
called nonflowering plants
and produce
spores instead of
seeds.
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Spores are
microscopic specks
of living material.
Ferns produce their
spores on the
undersides of the
leaves (fronds).
They are the brown
"spots" or "pads" on
the bottom of the
leaves.
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Some plants uses
plant parts in
order to
reproduce. We
call it asexual
reproduction or
vegetative
propagation of
plants.
Reproduction in Plants
PLANT
Sexual
•Flowers
REPRODUCTION
(perfect or imperfect)
•Pollination
(self or cross)
Asexual
VEGETATIVE
PROPAGATION
•Fertilization
•Fruits and Seeds
•Seed dispersal/Germination
•Seedling-
young plant
Natural
Artificial
Natural Vegetative Propagation
Natural vegetative propagation is the
growing of new plants from parts of a
parent plant
such as underground stems, roots and
leaves.
New Plants From Stems
Modified stems
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Bulb
Examples: onion (sibuyas), lily, hyacinth
and tulip
A bulb is consist of a short stem base with
one or more buds enclosed in many fleshy
leaves, which store food.
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Corm
Examples: Gabi, Gladiola and Begonia
Corm is a thick stem base with scaly
leaves at the nodes and contains stored
food.
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Tuber
Examples: Irish potato
Tuber is enlarged because of stored food.
The “eyes” of the potato are its nodes
where buds and roots
will develop.
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Rhizome
Example: Ginger (luya), birds of paradise
Rhizome is an underground stem that
grows horizontally near the soil surface.
Roots and buds develop at the nodes and
grow into new plants.
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Runners and Stolons
Examples: Strawberry and Bermuda
These stems grow horizontally above the
ground. When the node touches
the ground the roots and leaves develop
and a new plant grows
New Plants from Roots
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Plants like the turnip (or singkamas),
carrot, radish and sweet potato (kamote)
have storage roots.
These roots contain food.
When planted, storage roots grow into
new plants.
New Plants from the Leaves
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Katakataka has leaves that produce new
plants separate from the parent plant and
continue to grow.
Begonia plants have also produce new
plants from their leaves that touch the soil.
Artificial Vegetative Propagation
It is a method of propagating
plants develop by people who are
engaged in the production of
plants for food or decoration.
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Cutting
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The cutting produces new roots, stems, or
both, and thus becomes a new plant
independent of the parent.
Layering

Layering is a technique for plant
propagation in which a portion of an aerial
stem is encouraged to grow roots while
still attached to the parent plant and then
removed and planted as an independent
plant.
(A)Pull branch down for
simple layer.
(B) Make wound or cut
at bend.
(C) Stake tip to hold
upright.
Compound layers
are suitable for
plants with long
stems or vines.
Grafting
A branch or stem is
cut from one plant
carefully and joined to
another. The branch
or stem shares the
food and water that
passes through the
stem of the mother
plant.
Grafting is done to
improve the quality of
some plants.
Grafting is use to:
1. speed the maturity of some plants.
2. provide strong stalk for some ornamental
plats.
3. repair a damage trunk of a tree which stops
the flow of nutrients.
Budding
It is done by choosing
and cutting a bud from
one plant and attaching
it to another plant.
The bud must fit well to
the mother plant.
When the bud grows
big enough it will
become part of the
plant.
Steps
3
2
1
1
4
5
6
7
Marcotting
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In marcotting, a healthy mature plant is
selected.
The bark of the plant’s stem is removed.
Soil must be put around the open stem
which is then wrapped with cloth, plastic or
coconut husk.
In few months time, roots will grow out of
the stem.
Cloning
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Cloning is a method of producing a new
plant using tissue of culture.
Beginning with a group of cells cut from
the part of the mother plant, thousands of
exact copies can be produced within a
short period.
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Natural Vegetative propagation

- the growing of new plants from parts of a
parent plant such as underground stems,
roots and leaves.

Plants can grow from stems, roots and leaves
(Modified stem)
 A. bulb
 B. tuber
 C. corm
 D. rhizome
 E. runners/ stolons
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Artificial vegetative propagation

A method of propagating plants develop by
people who are engaged in the production
of plants for food or decoration.

Cutting
Grafting
Layering
Budding
Marcotting
Cloning
These methods of propagation helps
improve the quality of plants.
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