Transcript Introduction to Plant Reproduction

Introduction to Plant
Reproduction
Objective 1.1
Define Propagation
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Propagation
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The reproduction of plants either sexually or
asexually.
Objective 1.2
Define sexual reproduction and
the terms associated with it.
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Sexual Reproduction:
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The union of the female and male sex cells to
produce a seed (embryo).
Ovule: female sex cell.
 Pollen: male sex cell.
 Embryo (seed-germ): an immature plant.
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*Sexual reproduction involves the creation of
a genetically new individual.
Objective 1.3
List and explain the different
types of seeds.
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Monocots:
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Seeds with one seed leaf.
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Leaves have parallel
veins.
1 solid seed.
Stem vacular bundles
scattered.
Roots are adventitious
Flowers in multiples of
three.
Pollen with single
furrow or pore
Dicots
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Seeds with 2 seed leaves
or 2 cotyledons
Veins are “webbed.”
Pollen with three furrows
or pores.
Flowers parts in
multiples of four or five.
Stem vascular bundles in
a ring.
Monocots
Dicot Leaf
Dicot
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Objective 1.4
List and explain the different
types of flowers.
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Complete
Incomplete
Complete Flowers
 Sepals
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The outer part of the flower.
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In open flowers, the sepals are found at the
base of the plant.
Petals
The brightly colored, soft tissue that attracts
insects.
Stamens
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The male part of the flower that has an
anther at the end of it to produce pollen.
Pistil
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Stigma
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Style
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The opening of the pistil.
The tube-like structure that connects the
stigma and ovary.
Ovary
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The site of fertilization and growth of the
seed.
Stigma, Style & Ovary
Ovary
Complete Flower
Complete Flower
Incomplete Flower
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An incomplete flower
is one that lacks one
or more of the four
principal components
identified in a
complete flower.
Objective 1.5
Explain the difference between a
perfect and imperfect flower
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A perfect flower is
one with both the
stamen and pistil
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An imperfect flower
is one that lacks one
of the sex organs.
Objective 1.6
Define pollination, fertilization
and germination.
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Pollination
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Fertilization
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The transfer of pollen
from an anther to a
stigma of a flower of the
same species.
The union of the pollen
and ovule cells.
Germination
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The sprouting of a seed.
Objective 1.7
Define asexual reproduction
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Asexual Reproduction:
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The reproduction of a plant without the uniting of a
pollen and ovule.
Asexual reproduction is often referred to as vegetative
propagation since no seed is involved in the formation
of the new plant.
It is known as a clone.
Leaves, stems or roots may be used to grow a new
plant.
*Produces a genetically identical plant.
Objective 1.8
List the benefits of vegetative
propagation.
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True traits of the parents
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No seed
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Maintains genetic purity with
100% replication of parent plant.
Some plants do not produce a seed or the seeds are
too small to work with.
Accelerates the time it takes to get a new plant to
the market
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Traditionally, it would take up to 40 years to get a
new plant to the general public; however,
micropropagation can yield marketable levels of
plants within 8 to 12 years.
Objective 1.9
List and explain the different types of
vegetative propagation.
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Layering
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Cutting
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Taking a bud from one plant and moving it to another.
Grafting
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Using a short section of plant stems for propagation.
Budding
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Involves getting roots to grow from the stem. I.e., magnolia tree
Placing a section of a stem of one plant onto another plant.
Tissue culture
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Taking a group of cells or a single cell and growing it to a plant.
Layering
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Cutting
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Tissue Culture
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