Transcript Different Types Of Seed Dispersal

Different Types Of Seed Dispersal
By Group 6
Ruth, Joanne, Danish and Nirupan
Introduction
Plants, unlike humans, have many different types
of reproduction methods: seeds, spores, stem
cutting and more. We will explain to you about
different types of reproduction methods other
than seeds.
- Listen closely as there will be prizes at the
end.
Reproduction by spores
• Unlike seeds, spores are an asexual method of
reproduction in plants.
• Scientists believe that, at one time, all plants were actually
spore-bearing.
• However, plants began to form seeds rather than spores.
• Primitive plants such as mosses, algae and ferns now rely
on spores to reproduce.
Layering
• These plants produce long, drooping canes.
When the canes make contact with the soil,
they Begin to take root and form new plants.
• Example of plants which uses this technic:
• Blackberries and multiflora roses
•
Budding
• A bud like outgrowth is formed on one
side of the parent cell and soon it
separates and grows into a new plant.
• Example of plant that uses this technic: yeast
•
Vegetative reproduction
• Many plants have the ability for vegetative
propagation.
• Meristematic cells capable of cellular differentiation are
present in many plant tissues.
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This is a mulberry
tree that reproduces
by the process of
vegetative propagationvegetative propagation.
Suckers
• Some plants produce new plant shoots from their
root systems.
• This form of vegetative reproduction is called
suckering.
• The new shoots are called suckers.
Banana trees reproduce by suckers.
Grafting
• A form of asexual plant propagation.
• Consists of connecting two pieces of living plant
tissue in a way that allows the parts to grow and
develop as a single plant.
• A piece of stem or shoot with dormant buds, known
as the scion, is the part that will grow and develop
with branches.
Plantlets and Growth From
Damage
• Plantlets
• Plantlets are new, small plants that grow on the leaf
edges of a parent plant.
Duckweed reproduces by plantlets.
• Growth from Damage
• Tree stumps often produce new shoots; broken
leaves can also take root.
Runners
• Plants like strawberry produce stems that grow
along the ground, creating new plants at intervals
along the runner, complete with roots and leaves.
• The runners are also called stolons.
Strawberry plant
Stem Cutting
• Forcing a cutting to produce roots is the most
common method of propagation.
• This method can used on leaves or stems,
depending on the type of plant.
• This method usually works better with herbaceous
plants but can be successful with woody plants as
well.
This is a geranium that
reproduces by stem cutting.
Quiz Time!!!
Q1) What is another name for runners?
Ans: Stolons
Q2) Is spores a sexual or asexual way of reproducing?
Ans: asexual reproduction
Q3) How do duckweeds reproduce?
Ans: Plantlets
Conclusion
In conclusion, there are many types of
reproduction methods for plants. For example,
spores, stem cutting etc.
Credits and Sources
• Wikipedia, eHow.com, gardenguides.com,
Google and Yahoo
• Tom Clark, Mount Holyoke College Botanic
Garden, Horticulture Identification and
Judging Contest, Plant Propagation
THANK YOU FOR YOUR KIND
ATTENTION!!!!