Title: Part 1: Plant Reproduction
1Part 1 Plant Reproduction
2Definition of Plant Reproduction
- Reproduction
- Process by which organisms duplicate themselves
- Propagation
- Deliberate reproduction of plants either sexually
or asexually.
3Sexual 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
4Sexual 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
5Sexual and Asexual Reproduction
- Homologous Chromosomes
- Produce different plants
- Homozygous Chromosomes
- Produce nearly exact duplicates
6Cootie 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
7Part 2
- Breaking down Sexual and Asexual Propagation
8Sexual 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
9Benefits 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
10Bell-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?
11Asexual 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
12Types of Asexual Propagation
- Cutting
- Using a short section of plant stems for
propagation.
13Types of Asexual Propagation
- Layering
- Involves getting roots to grow from the stem.
I.e., magnolia tree
14Types of Asexual Propagation
- Budding
- Taking a bud from one plant and moving it to
another.
15Types of Asexual Propagation
- Separation
- Using vegetative structures are separated from
the parent plant as a natural means of
reproducing.
16Types of Asexual Propagation
- Grafting
- Placing a section of a stem of one plant onto
another plant.
17Types of Asexual Propagation
- Tissue culture
- Taking a group of cells or a single cell and
growing it to a plant.
18Benefits 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.
19Show 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.
20Exit 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.
21Show What You KNOW!
- List the benefits of sexual and asexual
propagation.