Part 1: Plant Reproduction - PowerPoint PPT Presentation

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Part 1: Plant Reproduction

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Part 1: Plant Reproduction Asexual and Sexual Definition of Plant Reproduction Reproduction Process by which organisms duplicate themselves Propagation Deliberate ... – PowerPoint PPT presentation

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Title: Part 1: Plant Reproduction


1
Part 1 Plant Reproduction
  • Asexual and Sexual

2
Definition of Plant Reproduction
  • Reproduction
  • Process by which organisms duplicate themselves
  • Propagation
  • Deliberate reproduction of plants either sexually
    or asexually.

3
Sexual and Asexual Reproduction
  • Sexual Reproduction
  • Through formation of seeds
  • Requires two sex cells or gametes
  • Formed by meiosis
  • Each requires one set of chromosomes (haploidal)
  • Two gametes form cell with two sets of
    chromosomes (diploidal)
  • Zygote

4
Sexual and Asexual Reproduction
  • Asexual reproduction
  • Vegetative process
  • Eliminates genetic variation
  • Facilitated by combination of
  • Mitosis
  • Normal division of cell nucleus
  • Cytokinesis
  • Completion of division and formation of cell wall

5
Sexual and Asexual Reproduction
  • Homologous Chromosomes
  • Produce different plants
  • Homozygous Chromosomes
  • Produce nearly exact duplicates

6
Cootie Catcher Review
  • Using the template provided, follow the
    instructions to make your very own cootie
    catcher.
  • To label the cootie catcher, put colors on the
    front, numbers on the inside and definitions
    under the flaps.
  • You will have four main flaps to write the
    definitions of the following terms
  • Reproduction
  • Propagation
  • Sexual Propagation
  • Asexual Propagation

7
Part 2
  • Breaking down Sexual and Asexual Propagation

8
Sexual Propagation
  • Sexual Reproduction
  • 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.
  • Sexual reproduction involves the creation of a
    genetically new individual.
  • Uses seeds in one of two ways
  • Scarification
  • Breaking seed coat to permit water uptake by
    embryo
  • Stratification
  • Exposure of seed to low temperatures
  • Destroys growth inhibitors
  • Occurs naturally during winter

9
Benefits of Sexual Propagation
  • Less expensive than asexual
  • Faster than Asexual
  • It is the only way to get new varieties of plants
  • Some plants can only produce sexually

10
Bell-ringer ExerciseShow What You Know!
  • In your own words, describe sexual propagation.
  • List two benefits of sexual propagation.
  • What two ways can you prepare a seed for
    germination?

11
Asexual Propagation
  • The reproduction of a plant without the uniting
    of a pollen or ovule.
  • Can be referred to as vegetative propagation
    since no seed is involved.
  • Uses vegetative parts of existing stock plant to
    grow new plants called daughter plants.
  • Leaves, stem or roots
  • The daughter plant will have traits identical to
    those of the plant which they were derived, also
    called a clone
  • Clones
  • New plants reproduced asexually from single plant
  • Ramet
  • Individual plant within clone
  • Clonal Varieties
  • Important plants propagated almost totally by
    asexual means

12
Types of Asexual Propagation
  • Cutting
  • Using a short section of plant stems for
    propagation.

13
Types of Asexual Propagation
  • Layering
  • Involves getting roots to grow from the stem.
    I.e., magnolia tree

14
Types of Asexual Propagation
  • Budding
  • Taking a bud from one plant and moving it to
    another.

15
Types of Asexual Propagation
  • Separation
  • Using vegetative structures are separated from
    the parent plant as a natural means of
    reproducing.

16
Types of Asexual Propagation
  • Grafting
  • Placing a section of a stem of one plant onto
    another plant.

17
Types of Asexual Propagation
  • Tissue culture
  • Taking a group of cells or a single cell and
    growing it to a plant.

18
Benefits of Asexual Propagation
  • True traits of the parents
  • Maintains genetic purity with
  • 100 replication of parent plant.
  • Produces more plants faster
  • No seed
  • Some plants do not produce a seed or the seeds
    are too small to work with.

19
Show What You Know!
  • In your own words, define asexual propagation.
  • List the benefits of asexual propagation.
  • List the types of asexual propagation and give
    one key word for each type.

20
Exit Ticket
  • ________ is the deliberate reproduction of plants
    either sexually or asexually.
  • The process by which organisms duplicate
    themselves is called____________.
  • Homologous produces ________ plants and
    homozygous produces __________ plants.
  • Define asexual propagation.
  • Define sexual propagation.
  • Explain the processes that facilitate asexual
    propagation.
  • List the benefits of sexual and asexual
    propagation.
  • Select three types of asexual propagation and
    describe the process of each.

21
Show What You KNOW!
  • List the benefits of sexual and asexual
    propagation.
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