Group Title: CFREC-Apopka research report - Central Florida Research and Education Center-Apopka ; RH-90-24
Title: Use of Thidiazuron in attempt to stimulate basal branching of Monstera Siltepecana
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 Material Information
Title: Use of Thidiazuron in attempt to stimulate basal branching of Monstera Siltepecana
Series Title: CFREC-Apopka research report
Physical Description: 2 p. : ; 28 cm.
Language: English
Creator: Henny, R. J
Fooshee, W. C ( William C. ), 1951-
Central Florida Research and Education Center--Apopka
Publisher: University of Florida, IFAS, Central Florida Research and Education Center-Apopka
Place of Publication: Apopka FL
Publication Date: 1990
Subject: Branching processes   ( lcsh )
Foliage plants -- Growth -- Florida   ( lcsh )
Genre: government publication (state, provincial, terriorial, dependent)   ( marcgt )
bibliography   ( marcgt )
non-fiction   ( marcgt )
Bibliography: Includes bibliographical references (p. 2).
Statement of Responsibility: R.J. Henny and W.C. Fooshee.
General Note: Caption title.
 Record Information
Bibliographic ID: UF00065854
Volume ID: VID00001
Source Institution: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: oclc - 70287706

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}- D ( Use of Thidiazuron in Attempt to Stimulate Basal Branching
of Monstera Siltepecana

R.J. Henny and W.C. Fooshee

University of Florida, IFAS
Central Florida Research and Education Center Apopka
2807 Binion Road, Apopka, Florida 32703
CFREC-Apopka Research Report RH-90-24

Introduction: Monstera siltepecana is an unusual vining foliage plant with
attractive leaves that have a silvery sheen between the leaf veins.
However, it does not produce basal breaks and hence its use as a potted
plant is limited. We felt that stimulating development of basal shoots by
growth regulator treatment might enhance its value. With this goal in
mind, we treated Monstera siltepecana with thidiazuron.

Thidiazuron, the active ingredient in a commercial cotton defoliant
(Droppe 50 WP; NOR-AM Chem Co., Wilmington, DE), has been shown to produce
cytokinin-like activity in tissue cultures of bean (2). In a previous test
with Alocasia (1) thidiazuron stimulated development of many basal buds at
the base of treated plants; however, most buds failed to produce leaves or
grow out. In addition, shoot and root growth of treated plants were
stunted severely at the higher treatment levels.

Materials and Methods: Sixty rooted liners of Monstera siltepecana,
growing in 1-inch plastic cells (72 cells per tray), were potted into
4-inch pots containing VerGro container mix (Verlite Co. Tampa, Fl) on June
8, 1989. Plants were treated with thidiazuron the same day by applying
10 ml (2 teaspoons) of test solution at their base using a syringe. The
treatment solutions were made from dilutions of a 100 ppm stock solution
(200 mg Dropp 50 WP/liter = 100 ppm a.i.). Ten plants were treated at each
thidiazuron rate of 0, 1, 5, 10, 50 and 100 ppm. Data recorded at 12 weeks
after treatment included number of buds longer than 1 cm and fresh weight
of shoots and roots.

Results and Discussion: The response of Monstera siltepecana to
thidiazuron treatment was comparable to that observed with Alocasia (1).
Treated plants produced several buds greater than 1 cm in length but most
buds failed to grow out by termination of the experiment (Table 1). The
buds formed at the 50 and 100 ppm treatment levels were abnormal in

Growth of treated plants was stunted compared to control plants. Root
and shoot weights were less at all treatment levels except the 1 ppm rate.
At the 50 ppm treatment shoot and root weights were 1/3 and 1/8 of the
controls respectively. The small values for root weight at high rates of
thidiazuron suggest root loss as all plants were well rooted initially.
Avoidance of root damage will be imperative if thidiazuron use as a
branching stimulater is to become acceptable commercially. Results from
this study indicate that rates tested should not exceed 5 ppm.
r'-- 1S^H

Table 1. Effect of thidiazuron (DroppR 50 WP) on plant growth and
production of elongated basal buds in Monstera siltepecana. Treatments
were applied as a 10 ml soil drench to the base of plants in 4-inch pots.

Thidiazuron Total no. Fresh Weight Shoot/
concentration elongated shoots roots Root
(ppm) buds (g) (g) Ratio

0 0.0 31.8 10.6 3.2
1 0.6 35.6 10.7 3.4
5 6.7 30.1 7.1 4.6

10 16.7 26.7 4.9 6.6

50 11.6 10.6 1.3 8.5

100 3.9 6.7 0.8 10.7

LSD (5%) 4.8 3.9 1.9 4.1

Literature Cited:

1. Henny, R.J. and W.C. Fooshee. 1990. Thidiazuron stimulates basal bud
and shoot formation in Alocasia X Chantrieri Andre'. HortScience

2. Mok, M.C., D.W.S. Mok, D.J. Armstrong, K. Shudo, Y. Isogai and T.
Okamoto. Cytokinin activity of N-phenyl-N1-1,2,3-thiadiazol-5-ylurea
(Thidiazuron). Phytochemistry 21:1509-1511.


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