Ornamental
crops
particularly
cut
flowers
are
considered
sensitive
to
heavy
metals
(HMs)
induced
oxidative
stress
condition.
Melatonin
(MLT)
is
a
versatile
phytohormone
with
the
ability
mitigate
abiotic
stresses
in
plants.
Similarly,
signaling
molecules
such
as
hydrogen
sulfide
(H2S)
have
emerged
potential
options
for
resolving
HMs
related
problems
The
mechanisms
underlying
combined
application
of
MLT
and
H2S
not
yet
explored.
Therefore,
we
evaluated
individual
applications
(100
μM)
form
sodium
hydrosulfide
(NaHS),
donor
H2S,
(1.5
mM)
alleviate
cadmium
(Cd)
(50
mg
L−1)
stock
(Matthiola
incana
L.)
plants
by
measuring
various
morpho-physiological
biochemical
characteristics.
results
depicted
that
Cd-stress
inhibited
growth,
photosynthesis
Cd-associated
excessive
ROS
accumulation.
Combined
efficiently
recovered
all
these
attributes.
Furthermore,
Cd
stress-induced
markers
including
electrolyte
leakage,
malondialdehyde,
peroxide
partially
reversed
Cd-stressed
application.
This
might
be
attributed
or
antioxidant
plant
defense
activities,
which
effectively
reduce
severity
indicators.
Overall,
supplementation,
favorably
regulated
tolerance
stock;
yet,
use
had
greater
effect
on
than
independent
Functional Plant Biology,
Journal Year:
2023,
Volume and Issue:
51(1)
Published: June 2, 2023
While
ameliorating
effects
of
melatonin
(MT)
on
abiotic
stress
tolerance
in
plants
are
widely
reported,
the
mechanism
that
underlies
this
process
remains
elusive.
This
work
investigated
mechanisms
by
which
MT
improved
drought
pepper
(Capsicum
annuum)
plants.
A
foliar
spray
0.1
mM
treatment
was
applied
to
grown
at
80%
and
40%
full
field
capacity
for
3
days.
Drought
caused
a
significant
decrease
plant
dry
weight,
relative
water
content,
leaf
potential,
PSII
efficiency
(Fv/Fm
ratio),
chlorophyll,
soluble
protein,
root
nitrogen
content.
increased
hydrogen
peroxide,
malondialdehyde
(MDA),
nitrate,
ammonium,
free
amino
acids,
sugars,
proline
glycine
betaine.
also
peroxidase
(POD),
glutathione
S-transferase
(GST)
catalase
(CAT)
activities,
electrolyte
leakage
(EL)
methylglyoxal
(MG).
pre-treatment
reduced
oxidative
metabolism
activating
various
enzymes
such
as
nitrate
reductase
(NR),
nitrite
(NiR),
glutamine
synthetase
(GS),
glutamate
(GOGAT)
dehydrogenase
(GDH)
activities.
It
activated
related
glyoxalase
system
(Gly
I
Gly
II)
decreased
NO3−,
NH4+
acid
Our
study
suggests
cost-effective
sustainable
solution
improve
crop
productivity
water-limited
conditions,
enhancing
growth,
photosynthesis
