- a plant
part that when removed from the parent plant and placed under theproper
environmental conditions forms adventitious roots and/or shoots.
TO MINIMIZE WATER LOSS IN CUTTINGS?
1) Place cuttings
in cool, humid area - for leafless
2) Spray cuttings
antitranspirants - chemicals that decrease transpiration by
forming a film on the leaf surface or
by physiologically closing stomata.
3) Place cuttings
in a humidity chamber - enclosed chamber
with very high humidity.
4) Place cuttings
under an intermittent mist system.
A propagation system that
periodically (every 5 to 30 minutes) sprays a fine mist of water on the
cuttings to keep the foliage moist and minimize water loss.
a) high relative
b) cooler temperature
c) allows use of
higher light intensity
d) increases endogenous
root promoting substances
e) may decrease disease
- the loss of nutrients and other compounds from inside leaves
During intermittent mist
propagation up to half of some of the nutrients in the leaf can be leached
out. This causes the cuttings to be nutrient deficient. The
problem can be corrected with nutrient mist.
mist - addition of dilute fertilizers to
the mist; replaces nutrients lost to leaching. Use
2-6 oz. of a 20-20-20 or equivalent soluble fertilizer
per 100 gallons of water.
USED ON CUTTINGS
stimulates adventitious root formation on stem cuttings.
- IBA (most commonly used), NAA (frequently used), 2, 4-D (less used).
stimulates adventitious shoot formation on leaf or root cuttings.
- kinetin (commonly used), benzyladenine (BA) (commonly used), zeatin (seldom
pyranylbenzyladenine(PBA) ( used in research).