| Material Information
||Propagation of Aphelandra Squarrosa 'Dania' cuttings stimulated by bottom heat and rooting hormones
||ARC-A research report
||2 p. : ; 28 cm.
||Henny, R. J
Fooshee, W. C ( William C. ), 1951-
Agricultural Research Center (Apopka, Fla.)
||University of Florida, IFAS, Agricultural Research Center-Apopka
||Place of Publication:
||Aphelandra -- Propagation -- Florida ( lcsh )
Plant cuttings -- Rooting -- Florida ( lcsh )
Plant hormones -- Testing -- Florida ( lcsh )
||government publication (state, provincial, terriorial, dependent) ( marcgt )
bibliography ( marcgt )
non-fiction ( marcgt )
||Includes bibliographical references (p. 2).
||Statement of Responsibility:
||R.J. Henny and W.C. Fooshee.
||Florida Historical Agriculture and Rural Life
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Agricultural Sciences and should be
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Copyright 2005, Board of Trustees, University
PROPAGATION OF APHELANDRA SQUARROSA 'DANIA' CUTTINGS
STIMULATED BY BOTTOM HEAT AND ROOTING HORMONES
R. J. Henny and W. C. Foosheel
University of Florida, IFAS
Agricultural Research Center-Apopka
ARC-A Research Report RH-83-10
Most foliage plants are easily propagated using softwood cuttings.
Their ease in rooting often obviates the use of rooting hormones or bottom
heat which are commonly used to stimulate rooting in many harder-to-root
woody plants. As a result, little detailed research has been conducted to
study the effect of either rooting hormones or bottom heat on root
initiation in most foliage plants (1,2). In this study, Aphelandra
squarrosa 'Dania' was chosen as an example of an easy-to-root foliage plant
in order to see if these cuttings could be stimulated to root faster than
normal using bottom heat in combination with different levels of the
root-inducing indole-3-butyric acid (IBA).
Ninety-six cuttings, obtained from a commercial nursery, were divided
into two equal and uniform groups. Cuttings had at least two pairs of fully
developed leaves plus the expanding terminal growing point. Each batch of
48 cuttings was divided into 4 groups of 12, with each group receiving one
of the following treatments before being inserted into the propagation
1. Control (o treatment)
2. Hormodin () No. 1 (0.1% IBA)
3. Hormodin No. 2 (0.3% IBA)
4. Hormodin No. 3 (0.8% IBA)
The basal 1-cm of each treated cutting was dipped into the various Hormodin
rooting powders followed by a light tapping to remove excess powder.
Cuttings were then placed in a 1:1 peat/perlite propagation medium at a depth
of approximately 2 1/2 4 centimeters (1 1 1/2 inches). One group of
cuttings was placed in unheated propagation medium with a temperature range
of 16- 190C (61 670F) and the other in a medium heated to 26 300C (79 -
860F) with an electric heating cable. Cuttings were placed under mist (15
seconds on every 30 minutes from 9:00 am to 4:00 pm daily) on January 14,
1983. Treatments were placed in a randomized block experiment design in both
Cuttings from the heated rooting medium were removed and evaluated after
18 days. Those from the unheated bench were examined after 35 days. Data
consisted of counting all roots longer than 1 centimeter (cm) and measuring
the longest root from each cutting.
_ _ _'[ -;u... L.
The authors wish to thank the Merck Che ical Division of Merck & Co., Inc.
for supplying the Hormodin powders used in thi s'j'tudy.i195
.S 4 [ f ,
Both bottom heat and rooting hormones stimulated rooting of Aphelandra
squarrosa 'Dania' (Table 1). Cuttings with bottom heat rooted almost twice
as fast as unheated ones. In addition, Hormodin #2 and #3 induced
significantly more roots than Hormodin #1 or the untreated control, whether
the cuttings were heated or unheated. However, mean root length was
significantly shorter at the highest hormone level (Hormodin #3) in both
cases. This may have been due to the large number of roots formed by this
treatment. Roots were so crowded that elongation may have been inhibited.
Based on results from this experiment, it appears that application of
bottom heat and rooting hormones can greatly benefit rooting of Aphelandra
squarrosa'Dania'. Although more roots were initiated using Hormodin #3, it
may be desirable to use Hormodin #2 (or similar compound) with its lower
hormone level to avoid producing an excessive number of roots which retarded
subsequent root elongation.
1. Poole, R.T., C. A. Conover and C. A. Robinson. 1980. Rooting hormones
and propagation of foliage plants. Foliage Digest 3(8):11-12.
2. Miller, V. J. and R. T. Poole. 1982. IBA effects on foliage plant
cuttings. Univ. of Fla., IFAS, ARC-Apopka Res. Rept. RH-82-11. 11 pp.
Table 1. Effect of hormone levels and 2 rooting temperatures and times on
mean number of roots produced and mean root length of Aphelandra
squarrosa 'Dania' cuttings.
Rooting time and temperature
18 days/79-800F 35 days/61-67F
Hormone Mean number Mean root Mean number Mean root
treatment roots length (cm) roots length (cm)
Control 9.0 ay 3.4 ab 10.7 a 3.9 a
Hormodin #1x 11.0 a 4.0 a 14.3 a 4.0 a
Hormodin #2 21.2 b 4.0 a 35.2 b 3.4 a
Hormodin #3 34.4 c 3.0 b 44.0 b 2.6 b
z12 replications per treatment.
Means within columns followed by different letters are significantly dif-
at 1% level by Duncan's New Multiple Range Test.
XHormodin #1 0.1% IBA, Hormodin #2 0.3% IBA and Hormodin #3 0.8% IBA.