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Title: Effect of variegation on growth and chilling sensitivity of 'Marble Queen' pothos
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Permanent Link: http://ufdc.ufl.edu/UF00065853/00001
 Material Information
Title: Effect of variegation on growth and chilling sensitivity of 'Marble Queen' pothos
Series Title: CFREC-Apopka research report
Physical Description: 2 p. : ; 28 cm.
Language: English
Creator: Chase, A. R ( Ann Renee )
Poole, R. T ( Richard Turk )
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
 Subjects
Subject: Variegated plants -- Growth -- Florida   ( lcsh )
Variegated plants -- Effect of temperature on -- Florida   ( lcsh )
Genre: government publication (state, provincial, terriorial, dependent)   ( marcgt )
non-fiction   ( marcgt )
 Notes
Statement of Responsibility: A.R. Chase and R.T. Poole.
General Note: Caption title.
 Record Information
Bibliographic ID: UF00065853
Volume ID: VID00001
Source Institution: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: oclc - 70287652

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HISTORIC NOTE


The publications in this collection do
not reflect current scientific knowledge
or recommendations. These texts
represent the historic publishing
record of the Institute for Food and
Agricultural Sciences and should be
used only to trace the historic work of
the Institute and its staff. Current IFAS
research may be found on the
Electronic Data Information Source
(EDIS)

site maintained by the Florida
Cooperative Extension Service.






Copyright 2005, Board of Trustees, University
of Florida









/ Effect of variegation on growth and chilling sensitivity
Sc / of 'Marble Queen' Pothos

A. R. Chase and R. T. Poole'

..University of Florida, IFAS
^ ." Cen 1 Flori Research and Education Center Apopka
1\ % CFREC- popka Research Report, RH-90-17


\ Ma ag ants are prized for their variegated leaves which add visual interest.
Ep'irem atM eum (pothos) has been grown for many years and several cultivars have
bee d eoped which range from solid green ('Green Gold') to variegated with yellow
('Golden Pothos') or white ('Marble Queen'). Although these cultivars were generated from
the solid green form, they possess differences in cultural requirements for optimal growth
related to the degree of variegation. Preliminary work on chilling sensitivity (500F)
indicated that 'Marble Queen' plants were more sensitive than their greener relatives. This
report summarizes experiments performed to evaluate the effect of variegation on growth
and chilling sensitivity of 'Marble Queen' pothos.

METHODS

Two tests were performed between January and July 1990 utilizing about 50 'Marble
Queen' plants each. Plants in 3" pots were established in Vergro with 6 g Sierra (17-6-12)
with minors/6" pot and grown on a greenhouse bench for 2 months. They were watered 2-3
times/week as needed and received 1500 to 3000 ft-c. (maximum) depending upon time of
year. At the end of the growth period, they were then graded for degree of variegation from
1 (all white) to 5 (all green). Number of leaves, number of vines greater than 6 inches in
length and total vine length were determined at this time as well. Plants were then
subjected to chilling conditions for 1 week at 50 F by placing them in temperature control
chambers. One week after the chilling treatment was completed, the number of leaves with
necrosis was determined. Correlations between the variegation rating and other data were
made statistically.

RESULTS AND DISCUSSION

Although the degree of variegation differed between the two tests, the majority of
plants (69 74%) in each test were rated from 2.5 to 3.5 (very good quality 'Marble Queen',
based on color and form). The mean number of leaves, vines and total vine length was
influenced by the degree of variegation in at least one of the two tests (Table 1 and 2).
Plant growth as measured by these parameters, increased as the degree of variegation (white
tissue) decreased. That is, the green plants grew better than the white ones. In addition,


1 Professors of Plant Pathology and Environmental Horticulture, respectively. Central
Florida Research and Education Center, 2807 Binion Rd., Apopka, FL 32703.








the whiter the plant the more severe the damage incurred from exposure to chilling
conditions.

It was interesting to note how different individual pots of 'Marble Queen' could be
from each other when they were obtained from a single source. Growers are advised to
carefully select plants for stock to eliminate those which are tgo white since theygrow more
slowly than those which are greener and are more sensitive to chilling injury. Cuttings
appeared the same when obtained and developed this range of variegation only after 2
months of growth, the problem for growers who purchase cuttings may be severe because/
as many as one third may be unacceptable.

Table 1. Effect of color on growth and sensitivity to chilling at 50OF for 1 week for
Epipremnum aureum 'Marble Queen' (Exp. 510 30 January to 17 April 1990).


Color # Observations Mean # Mean # leaves Mean #
Grade (percent) leaves with chilling vines
injury
2.0 6 (12%) 20.2" 8.3" 0"
2.5 8 (16%) 21.8 5.0 0.1
3.0 12(24%) 23.8 2.2 0.9
3.5 17(34%) 25.2 1.0 1.8
4.0 6 (12%) 27.2 0.8 1.5
4.5 1 (2%) 32.0 1.0 3.0


Color was graded on a scale from 1 (white) to 5 (green).
" Significant at the 1% level within columns.


Table 2. Effect of color on growth and sensitivity to chilling at 500F for 1 week for
Epipremnum aureum 'Marble Queen' (Exp. 541 18 April to 25 June 1990).


Color # Observations Mean # Mean # leaves Mean # Mean vine
Grade (percent) leaves with chilling vines length (cm)
injury
2.0 1 (2%) 32.0ns 13.0" 0" 0"
2.5 9 (16%) 27.0 4.9 1.9 48.3
3.0 13(23%) 29.4 2.3 1.8 62.1
3.5 17(30%) 28.5 3.6 2.1 77.5
4.0 12(22%) 27.0 4.0 1.5 65.8
4.5 4 (7%) 27.5 3.8 2.2 113.2
Color was graded on a scale from 1 (white) to 5 (green).


" Significant at the 1% level or not significant "s within columns.




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