Transcript Quiz 14B

Asexual Reproduction in Plants
Quiz 14B
Asexual Reproduction
 little genetic variation
 has genes identical to its parent’s
Advantages of Asexual
Reproduction
 identical plants
 saves time
 saves money
Types of Asexual Reproduction
 Vegetative reproduction
 Vegetative propagation
Vegetative Reproduction
The growth of
a new plant
from a stem,
leaf, or root
(something
other than a
seed).
Vegetative Propagation
Man’s use of vegetative
reproduction to grow a new
plant from a root, stem, or leaf.
Types of Vegetative Propagation
that are induced
 cuttings
(or slip)
 layering
 grafting
Cuttings (or slip)
A piece of a
stem, leaf, or
root which is
capable of
growing into a
new plant.
Cuttings (or slip)
Cuttings are possible because
certain types of plants are able to
sprout special types of roots at
the cut end of their stems.
Adventitious roots
When a yellow-flowering hedge
shrub is trimmed, a new shrub
may be started by simply sticking
a trimmed stem into the ground.
Layering
A branch is exposed to the soil,
allowed to form roots, and then
separated from the parent plant.
Vineyards use this method to
quickly reproduce a desirable
variety of grapes.
Layering
Layering
Grafting
The process of transplanting
living tissue from one plant to
another.
Used to propagate
seedless plants:
grapes,
navel oranges
This tree was
Grafting
developed by
the West family
in New South
Wales, Australia
and the process
involves grafting
branches
from compatible fruit trees onto one.
The result is 4 different trees each
with there own variety of fruit.
For example there
Grafting
is a stone fruit tree
with apricots,
peaches, plums,
nectarines and
peachcots; a citrus
tree with oranges,
mandarins,
lemons, limes,
tangellos, grapefruit; a multiple
apple tree, and a pear tree.
Types of Vegetative Propagation
that are natural
 underground stolons (mints)
 rhizomes (cattails)
 corms (gladiolus)
 bulbs (onion)
 tubers (Irish potatoes)
 runners (strawberries)
Underground Stolons
Underground Stolons
Rhizomes
Rhizomes
Corms
Corms
Bulbs
Bulbs
Tubers
Tubers
Runners
Runners