Vegetative Propagation

1
Vegetative Propagation

• Natural Methods

2
Epiphyllous Buds
Bryophyllum delagoensis
http//www.bryophyllum.com/b/files/img.php?width5
00file50.jpg
Bryophyllum daigremontianum
Cytokinins accumulate in notches stimulate shoot
development
http//www.bryophyllum.com/b/files/img.php?width5
00file60.jpg
3
Scaly Bulb
http//www.hort.cornell.edu/4hplants/Vegetables/Im
ages/Onion-23.jpg
Onion, Tulip, Daffodil
Scales are leaf bases. Basal plate is stem. Roots
are adventitious. Lateral buds in axis make
bulbils.
http//www.s-3gim.mb.edus.si/Medicina/Cokan/pomlad
anska3.jpg
4
Scaly Bulbs
http//www.floridata.com/ref/A/images/alli_sa3.jpg
In garlic bulbs, the lateral buds become bulbils
called cloves of garlic.
http//trc.ucdavis.edu/egsutter/plb171/VisualMater
ial/largePhotoSStruc/BulbsPic/bulb-tun-onion64labl
e.jpg
5
Corms Just the basal plate
Crocus and Gladiolus
http//trc.ucdavis.edu/egsutter/plb171/VisualMater
ial/largePhotoSStruc/corm-gladiolus74lable.jpg
Lateral buds develop into cormels
http//www.srgc.org.uk/bulblog/161003/Crocus20sat
ivus20corm20and20stigma.jpg
6
Tuber at end of rhizome (underground stem)
Tuber swells as a storage organ. The apical bud
and lateral buds are eyes. A piece of potato
with an eye can be treated almost like a seed.
http//www.csdl.tamu.edu/FLORA/tfplab/veg13.jpg
Potato, Helianthus tuberosus
http//www.bayercropscience.co.uk/images/upload/bl
ight.jpg
7
Stolons Spider Plant and Strawberry
http//www.botgard.ucla.edu/html/botanytextbooks/g
eneralbotany/images/typesofshoots/stolon/Fragarias
tolons2.jpg
Leafless overground branch develops crown which
arches to soil, roots, and becomes independent.
http//www.plantoftheweek.org/image/chlorophytum.j
pg
8
Tip layer
Black Raspberry and Forsythia
http//www.uwgb.edu/biodiversity/herbarium/shrubs/
rubocc_stem02.jpg
9
Tip Layer
Leafy shoot tip arches to soil, takes root, and
becomes independent plant. Bramble describes this
behavior.
http//pearl.agcomm.okstate.edu/hort/fruits/fruits
_images/f6215f3.jpg
10
Root sprouts
Red Raspberry and Rose, many others!
Roots growing from original plant near soil
surface, accumulate cytokinins, make
sprout. Results in thicket
http//www.urbanext.uiuc.edu/raspberries/images/di
agram_parts.gif
11
Vegetative Propagation

• Artificial Methods

12
Leaf-petiole Cutting
African violet Jade plant Kalanchoe Pepperomia
1. IAA produced
2. IAA transported
Blade
7. Shoot formed
Petiole
6. CK transport
3. Callus develops
4. Roots form
5. CK produced
13
Stem Cutting
Plectranthus and many more!

1. IAA produced
2. IAA transported
3. Callus develops
4. Roots form
5. Sell sooner!

IAA
IAA
IAA
IAA
14
Tip Layer

1. Bend stem to soil

Yes, it is both a natural and an artificial
method!
2. Wound bark on lower side
3. Apply rooting powder
4. Bury in moist soil
5. Anchor to ground
6. Wait and separate!
IAA
15
What if the plant you want to clone is a special
maple tree that turns wonderful combinations of
green, yellow, orange, and red in the fall. The
lowest branch is many feet above the soil making
a tip-layer impossible. Leaf and stem cuttings
fail but you think a tip-layer might work if only
the tree were not so tall. How do you solve this
dilemma?
If the cutting is Mohammad, and you cannot bring
Mohammad to the mountain, you should
bring the mountain to Mohammad! Air Layer!
We will work this example on the whiteboard
together in class!