Effect Of Accel, Sucrose And Silver Thiosulphate On The Water Relations And Post harvest Physiology Of Cut Tuberose Flowers
Date
2003Author
Hutchinson, M.J.
Chebet a, D.K
Emongor., V.E.
Type
ArticleLanguage
enMetadata
Show full item recordAbstract
This
study
investigated
the
influence
of
cytokinins,
gibberellins,
sucrose
and
silver
thiosulphate
on
water
relations
and
post-harvest
physiology
of
cut
tuberose
(Polianthes
tuberose
L.)
flowers.
Tuberose
flowers
held
in
de-ionised
water
(DIW)
had
a
vase
life
of
13
days
with
63%
floret
opening.
Addition
of
gibberellins
(G~+7)
in
the
vase
solution
had
no
effect
on
vase
life
or
floret
opening
along
the
spike.
Pulsing
of
the
cut
flowers
with
10%
sucrose
for
24
hr
before
transfer
to
DIW
improved
their
vase
life
by
4
days
and
improved
the
floret
opening
by
21
%
above
DIW
controls.
Addition
of
Benzylaminopurine
(BA)
at
low
concentrations
(25-50
mgL
-1)
improved
vase
life
of
the
cut
tuberose
stems
while
higher
concentrations
(75-100
mgL
-1)
gave
no
improvement.
A
24
hr
pulse
in
10%
sucrose
improved
the
vase-life
by
3.6
days
and
floret
opening
by
13%.
Pulsed
stems
transferred
to
holding
solutions
containing
various
concentrations
of
BA
improved
vase
life
by
an
extra
3
days
at
BA
concentration
of
25
mgL
-1.
Higher
BA
concentrations
gave
no
significant
(P>0.05)
improvement
over
the
pulsed
stems.
However,
floret
opening
was
greater
at
25
and
50
mg
L
-1
BA
(P<0.05).
Of
all
treatments,
STS
gave
the
greatest
improvement'
of
vase
life
at
7
days
longer
than
DIW
control
and
3.5
days
longer
than
the
sucrose-pulsed
solutions.
Very
high
(88%)
floret
opening
was
observed
in
cut
stems
held
in
STS.
There
was
a
general
decrease
in
water
uptake
by
tuberose
stems
over
time.
Lowest
rates
of
water
uptake
werepoted
in
all
treatments
after
8
days.
Among
the
treatments,
the
lowest
water
uptake
was
recorded
in
the
DIW
control
and
in
G~+7
treatments.
Greatest
uptake
was
in
10%
sucrose
+
25
mgL
-1
BA.
Transpiration
losses
were
greatest
for
25
mgL
-1
BA
and
least
for
10%
sucrose.
Differences
among
treatments
in
transpiration
losses
were
noted
only
in
the
flfst
10
days.
In
general,
water
deficit
was
noted
in
cut
flowers
held
in
DIW
and
in
G~+7
after
day
6,
while
stems
in
BA
treatments
manifested
symptoms
from
day
8.
The
cut
flowers
pulsed
in
10%
sucrose
and
held
in
25
and
50
mg
L
-1
BA
and
in
2
roM
STS
only
showed
water
deficit
status
from
day
12
of
~
their
va.-Jife.
Overall
results
suggest
that
STS,
BA
and
sucrose
can
help
improve
tu~iose
vase
life
and
floret
opening
through
improvement
of
the
water
balance.
Citation
M.J. Hutchinson, D.K. Chebet and V.E. Emongor. 2003. Effect of Accel, Sucrose and Silver thiosulphate on the Water Relations and Post harvest Physiology of Cut Tuberose Flowers. African Crop Science Journal II: 279-287Publisher
University of Nairobi Plant Science and Crop Protection